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-
- Description:
- The idea that structure determines the properties of a material is a powerful concept in chemistry and in all fields in which chemistry is important, including engineering, medicine, and materials science. My research aims to better understand the structure-property relationships of a class of materials known as metal–organic frameworks (MOFs)....
- Keyword:
- structure property relationships, contrast media, diamond anvil cell , metal–organic framework, nanomaterials, and materials chemistry
- Subject:
- Nanotechnology, Chemistry, and Materials Science
- Creator:
- Robison, Lee
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 06/28/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_795236 and http://dissertations.umi.com/northwestern:15463
-
- Description:
- Electrochemical devices play a vital role in the efforts towards a sustainable green future. Solid acid based electrochemical cells, employing super protonic CsH2PO4 (CDP) as the electrolyte component, offer unique application advantages due to their operability at intermediate temperatures 250°C. At these temperatures, one can achieve improved reaction kinetics over...
- Keyword:
- oxynitrides, fuel cells, solid acid fuel cells , atomic layer deposition, solid acid electrolyzer cells, and molybdenum oxynitrides
- Subject:
- Alternative energy, Materials Science, and Energy
- Creator:
- Pandey, Shobhit A
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/02/2022
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15837 and etdadmin_upload_858454
-
- Description:
- Thermoelectric devices utilize semiconducting n-type and p-type thermoelectric materials to convert heat into electricity. Despite their promise for deep space power generation or waste heat recovery, most high-performing thermoelectric materials reported in literature are absent in practical applications - partially due to inconsistent synthesis and poor mechanical performance. This work...
- Keyword:
- Thermoelectrics, Doping, Phase Equilibrium, Defects, Mechanical Properties, and Semiconductors
- Subject:
- Physical chemistry, Materials Science, and Energy
- Creator:
- Male, James Patrick
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 06/22/2022
- Date Created:
- 2022-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_879755 and http://dissertations.umi.com/northwestern:15943
-
- Description:
- A significant portion of material science research is concerned with understanding theway that defects affect the properties materials. In the field of thermoelectrics introducingor removing point (0D), dislocation (1D), grain boundary (2D), or precipitate (3D) defectsare popular methods for altering a materials thermoelectric efficiency. Herein I discussdifferent studies conducted during...
- Keyword:
- Saturation Annealing, Band Engineering, Point Defect, Thermoelectric, and Phase Boundary Mapping
- Subject:
- Materials Science
- Creator:
- Wood, Maxwell
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/01/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_773176 and http://dissertations.umi.com/northwestern:15347
-
- Description:
- Industrial processes heavily rely on catalysts to control product selectivity and lower energy barriers required for chemical transformations. Catalysts are most commonly solid heterogeneous catalysts that facilitate separations from reaction mixtures and enhance recyclability. Heterogeneous catalysts used in industrial processes exhibit efficacious results, but in certain instances drawing structure-function relationships...
- Keyword:
- Polymerization, Oligomerization, Metal–Organic Frameworks, Structure-property relationships, and Heterogeneous catalysis
- Subject:
- Chemistry and Materials Science
- Creator:
- Goetjen, Timothy
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/16/2023
- Date Created:
- 2022-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_938937 and http://dissertations.umi.com/northwestern:16320
-
- Description:
- To relate the mechanical responses of hard-soft copolymer systems with their microstructures, a coarse-grained molecular dynamics (CGMD) approach is employed. With the generic bead-spring polymer model mapped from atomistic simulations, this dissertation first studies the morphology of structures with various hard-soft compositions and interactions between hard beads. Following that, this...
- Keyword:
- coarse-grained molecular dynamics, local modulus, polyurea, micro-phase separation, interphase, and viscoelasticity
- Subject:
- Molecular physics, Materials Science, and Mechanical engineering
- Creator:
- Zhang, Min
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2018-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14464 and etdadmin_upload_626984
-
- Description:
- The start of the 21st century brought the sweeping proliferation of portable electronics such as laptops, tablets, and smartphones. These technologies were largely enabled by advances in energy storage methods – lithium ion batteries in particular. Society's push for more advanced energy storage applications, such as electric vehicles, stresses the...
- Keyword:
- conversion reaction, transmission electron microscopy, intercalation electrode, lithium ion battery, and electron energy loss spectroscopy
- Subject:
- Materials Science
- Creator:
- Castro, Fernando Cuauhtli
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2018-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_621102 and http://dissertations.umi.com/northwestern:14419
-
- Description:
- Transition metal oxides (TMOs) like perovskites are known to be versatile for functional properties such as ferroelectricity, magnetism, optical properties, and high-temperature superconductivity, because of their sensitive coupling between atomic structure and properties. By studying and understanding the fundamental structure-property relationships present in TMOs, it is possible to strategically engineer...
- Keyword:
- perovskites, Density functional theory, and oxygen vacancy
- Subject:
- Inorganic chemistry, Materials Science, and Condensed matter physics
- Creator:
- Shin, Yongjin
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/01/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15282 and etdadmin_upload_764869
-
- Description:
- Continuous and coordinated materials discovery efforts have amassed a wealth of knowledge concerning many general classes of materials. The number of known phases of all structure-types, however, is far less than number of possible materials dictated by the elements on the periodic table. Recently, with improved computational abilities and well-developed...
- Keyword:
- Materials Discovery, Solid-State Chemistry, Crystallography, and Synthesis
- Subject:
- Chemistry and Materials Science
- Creator:
- Flynn, Steven Matthew
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/15/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15456 and etdadmin_upload_794308
-
- Description:
- Thermoelectric (TE) materials has been drawn broad attention given that it can enable direct conversion between thermal and electrical energies, hence is treated as a vital candidate for clean power generation as well as waste heat recycling. However, the energy conversion efficiency of TE devices used nowadays is still very...
- Keyword:
- Nanostructure, Lead Chalcogenide, Thermoelectric, and Electron Microscopy
- Subject:
- Materials Science
- Creator:
- Cai, Songting
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 10/06/2021
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_829997 and http://dissertations.umi.com/northwestern:15626
-
- Description:
- Van der Waals, or layered, materials offer a flexible platform to tune properties via exfoliation down to the single- or few-layer limit; they are at the forefront of cutting-edge materials science and engineering research because of the innumerable ways to tune materials as a function of thickness or composition. Due...
- Keyword:
- liquid-phase exfoliation, van der Waals materials, ambient-reactive, two-dimensional materials, and solution processing
- Subject:
- Materials Science
- Creator:
- Lam, David
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 09/22/2022
- Date Created:
- 2022-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_913984 and http://dissertations.umi.com/northwestern:16137
-
- Description:
- Two-dimensional (2D) materials are a promising class of electronic materials that have generated great interest to improve and create new and existing technologies. The promise of this family of materials relies on their high surface-to-volume ratio and atomic thickness in addition to their unique (opto)electric properties. However, these morphological properties...
- Keyword:
- Two-dimensional, Indium Selenide, Electronics, Black Phosphorus, Passivation, and Liquid phase exfoliation
- Subject:
- Materials Science
- Creator:
- Wells, Spencer Allan
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2018-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_617587 and http://dissertations.umi.com/northwestern:14403
-
- Description:
- As the interest in rational synthesis for solid-state materials accelerates, there is an urgent need to understand the design principles concealed within these reactions. In situ material synthesis provides such an avenue to not only uncover these assembling rules, but also for finding new materials even in seemingly familiar phase...
- Keyword:
- Material Synthesis, Heteroanionic, In Situ, X-ray Diffraction, Solid-State Synthesis, and Rational Design
- Subject:
- Chemistry and Materials Science
- Creator:
- McClain, Rebecca
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 06/22/2022
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15949 and etdadmin_upload_880527
-
- Description:
- In the United States and around the world, the growing energy demands and climate concerns necessitate renewable and efficient energy production. Thermoelectric materials could be one small part of this larger picture movement, but their high cost and low efficiency must be improved to realize commercial use. To decrease the...
- Keyword:
- experimental, semi-empirical model, carrier concentration, dopability, Thermoelectric, and statistical and machine learning
- Subject:
- Materials Science
- Creator:
- Miller, Samuel A
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2018-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_612765 and http://dissertations.umi.com/northwestern:14381
-
- Description:
- Part I: Evaluating the relationship between Crosslink Kinetics and Thermodynamics with the hydrogel mechanics. The past two decades have witnessed a surge of applications built upon dynamic covalent chemistry (DCC), both attributed to the scope of developed reactions as well as their modularity.1-3 These reactions have comparable strengths to their...
- Keyword:
- Hydrogels, Rheology, Photoswitch, and Kinetics
- Subject:
- Organic chemistry, Polymer chemistry, and Materials Science
- Creator:
- Accardo, Joseph
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 06/22/2022
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15898 and etdadmin_upload_873494
-
- Description:
- Drying oils have been used as a binding medium for oil paints since the 15th century. These oil paints transition from a liquid-like paste to a solid-like film as a result of crosslinks forming between the oil molecules. These reactions have been extensively studied chemically, but other material properties are...
- Keyword:
- ATR-FTIR, Linseed oil, Drying oils, and Mechanical Properties
- Subject:
- Polymer chemistry and Materials Science
- Creator:
- dePolo, Gwen Ellen
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 08/23/2023
- Date Created:
- 2023-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16730 and etdadmin_upload_1012786
-
- Description:
- Supervised learning model is one of the most fundamental machine learning models. It can provide powerful capability of prediction by learning complex patterns hidden in many, sometimes thousands, predictors. It can also be used as a building block of other machine learning tasks, like unsupervised learning and reinforcement learning. Such...
- Keyword:
- Stochastic Microstructures, Fisher Score, Deep Learning, Machine Learning, Concept Drift, and Nonstationarity Analysis
- Subject:
- Materials Science, Statistics, and Computer science
- Creator:
- Zhang, Kungang
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/01/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_765218 and http://dissertations.umi.com/northwestern:15297
-
- Description:
- Nanocarriers are drug delivery vehicles that have at least one dimension at the nanoscale (10-9 m). Engineering the nanocarrier surface is a strategy for targeting drug delivery to specific cell types to enhance efficacy and minimize side effects. A useful analogy is to consider how the chassis of an automotive...
- Keyword:
- Nanotechnology, Glaucoma, Immunomodulation, Protein Adsorption, Nanocarrier Chassis, and Targeted Drug Delivery
- Subject:
- Pharmaceutical sciences, Materials Science, and Biomedical engineering
- Creator:
- Vincent, Michael Patrick
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/02/2022
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15870 and etdadmin_upload_863441
-
- Description:
- Nanomaterials are increasingly incorporated in modern day life, from the biogenic viruses that cause pandemics and the mineral crystallites embedded alongside collagen in our bones, to the anthropogenic nanomaterials that are small but powerful components of sunscreen and paint, swimming pool algaecides and wound dressings, cancer treatments, bicycle frames, and...
- Subject:
- Nanoscience and Materials Science
- Creator:
- DiCorato, Allessandra Elizabeth
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 10/07/2021
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_843461 and http://dissertations.umi.com/northwestern:15714
-
- Description:
- Selecting the best material to deliver optimum performance in real-world applications is one of the most significant challenges in engineering. Hundreds of thousands of computationally-predicted, but experimentally unexplored materials exist today in the public inorganic material databases as candidates for consideration. This thesis discusses three projects in the domain of...
- Keyword:
- statistical modeling, materials design, uncertainty quantification, materials selection, computational materials, and materials informatics
- Subject:
- Materials Science
- Creator:
- Gopakumar, Abhijith Mini
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/16/2023
- Date Created:
- 2022-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_947056 and http://dissertations.umi.com/northwestern:16368
-
- Description:
- Metallic conductivity and broken inversion symmetry were long thought to be contraindicated properties, under the assumption that long-range Coulombic interactions (screened by free charge carriers) were necessary for coordinated polar displacements. Within the past decade, the discovery of polar metals has prompted a rethinking of the relationship between metallicity and...
- Keyword:
- first principles, contraindicated, polar, phase, ferroelectric, and metal
- Subject:
- Physics, Chemistry, and Materials Science
- Creator:
- Hickox-Young, Daniel Timothy
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 10/07/2021
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15762 and etdadmin_upload_845260
-
- Description:
- Thermoelectric materials have attracted widespread attention in recent decades because of their ability to directly convert thermal energy into electrical energy. Given that waste heat is the primary source of lost energy in the world, the implications of developing better thermoelectric materials are both immediate and far-reaching. Admittedly, large progress...
- Keyword:
- phase diagram, thermoelectric, first-principles, density functional theory, thermodynamics, and energy
- Subject:
- Materials Science and Computational physics
- Creator:
- Hua, Xia
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/01/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15239 and etdadmin_upload_763275
-
- Description:
- Dual-phase (DP) steels have been widely applied in automobile industry, and are famous for continuous yielding in their corresponding stress-strain curves. The appearance of yield-point phenomena, or discontinuous yielding, is considered undesirable for DP steels. Herein, we take advantage of the undesirable appearance of yield-point phenomena in DP steels as...
- Keyword:
- dual-phase steel, inter-critical annealing, microstructure-property relationship, and Materials design
- Subject:
- Materials Science
- Creator:
- Ren, Qingqiang
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/01/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15327 and etdadmin_upload_770896
-
- Description:
- This thesis describes the synthesis and photophysical characterization of low-dimensionalmaterials—including thin-film semiconductors, colloidal quantum dots, and molecules—with the broader motivation of integrating them into mixed-dimensional heterostructures with novel responses to external stimuli. Due to their high surface area to volume ratio and incomplete dielectric screening, mixed-dimensional heterostructures have high sensitivity...
- Subject:
- Physics, Chemistry, and Materials Science
- Creator:
- Olding, Jack Nicklaus
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 10/07/2021
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15691 and etdadmin_upload_840718
-
- Description:
- Soft materials such as colloids and polymers often exhibit a variety of mesoscopic structures that are governed merely by weak physical interactions. Due to these intermediate structures, they can be easily taken out of thermal equilibrium by introducing external stimuli such as a shear flow and electromagnetic fields. This thesis...
- Keyword:
- Phase transition, Nonequilibrium dynamics, Coarse-grained simulations, Self-assembly, Soft matter, and Machine Learning
- Subject:
- Materials Science, Computational physics, and Statistical physics
- Creator:
- Han, Ming
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2018-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14411 and etdadmin_upload_618073
-
- Description:
- Increasingly high global energy consumption demands effective approaches to high energy efficiency and, at the same time, paths to reduced release of carbon dioxide, a primary greenhouse gas behind global climate change. Friction reduction is a vital aspect towards making energy systems more efficient and one of the most crucial...
- Keyword:
- wear, tribology, lubrication, and friction
- Subject:
- Materials Science and Mechanical engineering
- Creator:
- Khan, Arman Mohammad
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 06/28/2021
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15582 and etdadmin_upload_819626
-
- Description:
- One of the grand challenges in science is development of soft materials that mimic living organisms to optimize the way we use energy, translate or morph reversibly or sense their envi- ronment and respond in a useful fashion. Using the insights from studying biological structures, we hope to design soft...
- Subject:
- Materials Science, Biochemistry, and Computational chemistry
- Creator:
- Iscen, Aysenur
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14770 and etdadmin_upload_679718
-
- Description:
- From the early usage of metallic thin films as mirrors tracing back to 2900 BC, to the modern thin film photonic circuits as a mature optical processing platform, and to the growing class of atomically-thin two-dimensional (2D) materials with diverse and tailorable properties, thin film materials have played an important...
- Keyword:
- Two-dimensional materials, Photonic circuits, Thin film materials, Topological photonics, Electron-beam lithography, and Optical materials
- Subject:
- Physics and Materials Science
- Creator:
- Liu, Pufan
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/16/2023
- Date Created:
- 2022-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_946295 and http://dissertations.umi.com/northwestern:16358
-
- Description:
- Recent progress in semiconductor synthesis and photophysics has revealed a host of new materials with exciting properties for applications in optoelectronic devices such as sensors, photovoltaics, solid state lighting, and more. One of the most significant recent additions to the field is the class of hybrid and inorganic materials that...
- Subject:
- Physical chemistry, Chemistry, and Materials Science
- Creator:
- Cuthriell, Shelby A
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 08/23/2023
- Date Created:
- 2023-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16650 and etdadmin_upload_1000360
-
- Description:
- Herein, we present an overview of our studies of the morphology, dynamics, and formation of heterogeneous soft matter systems via the emerging technique of liquid phase transmission electron microscopy (LPTEM). This particular subset of materials, more commonly referred to as emulsions, is tremendously commercially and biologically relevant, encompassing applications in...
- Keyword:
- liquid phase transmission electron microscopy, soft matter, emulsions, polymers, and surfactants
- Subject:
- Polymer chemistry and Materials Science
- Creator:
- Vratsanos, Maria A.
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 08/23/2023
- Date Created:
- 2023-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_1009969 and http://dissertations.umi.com/northwestern:16698
-
- Description:
- The investigation of ceria-related materials has a long history since 1920s. The first publication on web of science traces back to 1928. Ever since that, more studies come out and surge starting from 1987. This material has attracted extensive attention due to its wide applications in electrochemical devices, catalysis, and...
- Keyword:
- zirconium, thermochemical fuel production, catalysis, ceria, redox kinetics, and oxygen vacancy
- Subject:
- Materials Science
- Creator:
- Yuan, Weizi
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/01/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15180 and etdadmin_upload_753575
-
- Description:
- Biological organisms have the extraordinary ability to form mineral structures with unparalleled control. From curved single crystals to hierarchically structured skeletal parts, biomineralization processes produce materials with properties that are highly optimized for their intended applications. These processing techniques occur at ambient conditions using materials abundant in the environment, and...
- Keyword:
- Enamel, Atom Probe Tomography, and Biominerals
- Subject:
- Materials Science
- Creator:
- DeRocher, Karen
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/01/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15281 and etdadmin_upload_764846
-
- Description:
- The on-going demand for miniaturized optical and on-chip photonic systems of the future has led to a few potential solutions in the literature. Recent advances in van der Waals and 2-dimensional materials signal a bright future for the next generation, compact electronic and photonic devices. With reduced dimensionality and material...
- Keyword:
- Polarization, Phonons, van der Waals, Plasmons, Wave plate, and 2D materials
- Subject:
- Optics, Materials Science, and Electromagnetics
- Creator:
- Abedini Dereshgi, Sina
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 05/31/2023
- Date Created:
- 2023-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16396 and etdadmin_upload_958293
-
- Description:
- The ability to control the crystalline ordering and morphology of polymeric nanomaterials is a grand challenge in the field of materials science, which could enable the development of functional materials able to solve long-standing problems in renewable energy and medicine. In this work, we explore a combination of supramolecular chemistry...
- Keyword:
- Regenerative Medicine, Supramolecular Polymer, Peptide Amphiphiles, Covalent Polymer, Photocatalysis, and Machine Learning
- Subject:
- Nanotechnology and Materials Science
- Creator:
- Bruckner, Eric Paul
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 06/22/2022
- Date Created:
- 2022-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_894432 and http://dissertations.umi.com/northwestern:15994
-
- Description:
- Nanomaterials present an exciting landscape of innovation at length scales below 100 nm, wherein controllable synthesis and materials metrology have led to tunable structure-property relationships and next-generation products. The disruptive field of nanotechnology is poised to capitalize upon the exotic chemistry and physics of these nanomaterials to enable more efficient...
- Keyword:
- graphene, scalable manufacturing, nanomaterials, nanomanufacturing, 2D materials, and electronic materials
- Subject:
- Nanotechnology, Materials Science, and Engineering
- Creator:
- Downing, Julia Rocio
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 05/31/2023
- Date Created:
- 2023-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16548 and etdadmin_upload_985168
-
- Description:
- Multimetallic nanoparticles represent an important class of electrocatalysts which are critical for many energy and environmental applications including fuel cells, hydrogen production, and greenhouse gas elimination. The properties of these nanoparticles depend on their composition, size, shape, and structure. Therefore, developing new strategies which provide a high level of control...
- Keyword:
- Electrocatalyst, Catalysis, Nanoparticle synthesis, and Multimetallic Nanoparticle
- Subject:
- Nanotechnology, Nanoscience, and Materials Science
- Creator:
- Huang, Liliang
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/01/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_754834 and http://dissertations.umi.com/northwestern:15185
-
- Description:
- Tooth enamel, the outermost layer of human teeth, is a complex, hierarchically structured biocomposite. The details of this structure are important in multiple human health contexts, from understanding the progression of dental caries (tooth decay) to understanding the process of amelogenesis (enamel formation) and related developmental defects.While much is known...
- Subject:
- Materials Science
- Creator:
- Free, Robert D
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/01/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15383 and etdadmin_upload_780056
-
- Description:
- In this dissertation, I summarize my findings of the dynamics of colloidal suspensions over a large range of volume fractions in two systems: drop impact and film rupture. The existence of a deformable surface in both these systems allows me to capture the consequences of non-Newtonian flow using high-speed imaging....
- Keyword:
- shear rheology, drop impact, Fluid dynamics, High-speed imaging, Soft matter, and Colloidal suspensions
- Subject:
- Physics and Materials Science
- Creator:
- Shah, Phalguni S.
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/16/2023
- Date Created:
- 2022-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_937776 and http://dissertations.umi.com/northwestern:16311
-
- Description:
- Advanced wireless soft electronics integrate a wireless power transfer circuit and a small battery. It is skin-compliant, and lightweight accommodating the complex motion of the body. These unique features of the device provide a continuous physiological measurement without discomfort and spatial constraints. Using the device, we can observe and track...
- Keyword:
- health monitoring, health data, wearable technology, sleep study, rehabilitation, and flexible electronics
- Subject:
- Materials Science, Health sciences, and Medicine
- Creator:
- Lee, Kun Hyuck Hyuck
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/15/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15329 and etdadmin_upload_770941
-
- Description:
- Atomistic methods offer a powerful set of tools in the study of materials systems, as they allow materials scientists to ask questions with a high degree of specificity. They are well suited for studying and designing energy materials, critical due to the climate crisis, in part due to their ability...
- Subject:
- Materials Science
- Creator:
- Patel, Shane
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 03/24/2023
- Date Created:
- 2023-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16415 and etdadmin_upload_962311
-
- Description:
- As the pursuit for higher performance and lower cost photovoltaics, and for new applications of optoelectronic devices moves beyond crystalline silicon, there are many unique opportunities for materials research into hybrid organic-inorganic, and organic semiconductors. This dissertation focuses on both hybrid organic-inorganic materials and organic materials for optoelectronic applications. In...
- Keyword:
- Perovskite, Self-assembly, and Ferroelectric
- Subject:
- Inorganic chemistry and Materials Science
- Creator:
- Passarelli, James
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/15/2021
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_797908 and http://dissertations.umi.com/northwestern:15491
-
- Description:
- Ultrafine particles are often used as lubricant additives because they can enter tribological contacts to reduce friction and protect surfaces from wear. They tend to be more stable than molecular additives under high thermal and mechanical stresses during rubbing. However, in lubricant oil, ultrafine particles tend to aggregate together to...
- Keyword:
- Graphene, Librication, and Tribology
- Subject:
- Materials Science
- Creator:
- Dou, Xuan
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2018-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14400 and etdadmin_upload_616912
-
- Description:
- Semiconductor nanocrystals possess unique photophysical properties that make them desirable for many optoelectronic applications such as photovoltaics, LEDs, and quantum computing. When the size of a semiconductor is reduced to below the excitonic Bohr radius of the material, its carriers becomes quantum confined resulting in drastic changes to optical, electronic,...
- Keyword:
- Nanocrystals, Spin, Semiconductors, Spectroscopy, Thermal properties, and Carrier Dynamics
- Subject:
- Physical chemistry, Chemistry, and Materials Science
- Creator:
- Harvey, Samantha
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/02/2022
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_857543 and http://dissertations.umi.com/northwestern:15830
-
- Description:
- Early-stage oxidation and corrosion mechanisms of CoCrMo and NiCrMo alloys can be analyzed on the nanoscale by transmission electron microscopy. Both alloys are attractive for a broad array of applications such gas turbines and aircraft engine components as they are known for their excellent corrosion resistance and mechanical properties at...
- Keyword:
- CoCrMo, Applied sciences, Electron microscopy, Corrosion, Oxidation, and Tribology
- Subject:
- Materials Science and Engineering
- Creator:
- Lin, Alex Yu-Wei
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 01/21/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15082 and etdadmin_upload_741813
-
- Description:
- The halide perovskites AMX3 (A = large cation, B = Sn or Pb, and X = halide) have been the subject of intense investigation due to their outstanding optical and electronic properties, which have enabled high solar cell efficiencies thanks to a beneficial electronic structure and long charge carrier lifetimes....
- Keyword:
- exciton, halide perovskite, semiconductor, radiation detector, and self-trapped exciton
- Subject:
- Inorganic chemistry, Applied physics, and Materials Science
- Creator:
- McCall, Kyle Matthew
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14511 and etdadmin_upload_638483
-
- Description:
- How molecular chirality manifests at the nano- to macroscale has been a scientific puzzle since Louis Pasteur discovered biochirality. In general, amphiphilic molecules can organize into a variety of assembly shapes including micelles, spherical vesicles, cylindrical micelles, and planar bilayers. However, when such amphiphilic molecules are chiral, helical ribbons, helicoidal...
- Keyword:
- self-assembly, soft mattter, electrostatics, membranes, chiral, and charge
- Subject:
- Physical chemistry, Physics, and Materials Science
- Creator:
- McCourt, Joseph
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 08/23/2023
- Date Created:
- 2023-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16654 and etdadmin_upload_1000771
-
- Description:
- This thesis explores the potential of two-dimensional (2D) or van der Waals (vdW) materials for printed optoelectronic devices. The research focuses on the development of processing, imaging, and modeling of materials and thin-film devices to optimize performance and introduce novel properties. A gate-dependent resistor network model is presented that establishes...
- Keyword:
- scanning probe microscopy, transition metal dichalcogenides, thin-film transistors, finite element simulation, printed electronics, and 2D materials
- Subject:
- Materials Science
- Creator:
- Zhu, Zhehao
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 05/31/2023
- Date Created:
- 2023-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16504 and etdadmin_upload_982806
-
- Description:
- The three-dimensional (3D) nanoscale structure of III-As nanowires is correlated with optical and electronic property measurements to deconvolve the contributions of strain, composition, and crystal structure to characteristics of interest for future electronic and optoelectronic devices. Multiple advanced two-dimensional (2D) and 3D characterization techniques are employed such as atom probe...
- Keyword:
- synchrotron, nanowires, coherent X-rays, III-Vs, atom probe tomography, and correlative imaging
- Subject:
- Physics and Materials Science
- Creator:
- Hill, Megan Olivia
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/01/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_771146 and http://dissertations.umi.com/northwestern:15331
-
- Description:
- Advancements in the understanding and synthesis of transition metal compounds have allowed materials engineers to design functional materials with a range of properties, such as ferroelectricity, non-linear optical activity, colossal magnetoresistance, and superconductivity. Conventional routes to tune and design functional materials includes chemical cation substitution and heterostructuring of oxide thin...
- Keyword:
- Oxyfluoride, Materials Design, Functional Properties, and Density Functional Theory
- Subject:
- Materials Science
- Creator:
- Harada, Jaye Kimiko
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 06/28/2021
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_819002 and http://dissertations.umi.com/northwestern:15569
-
- Description:
- Rationally assembled nanostructures exhibit distinct physical and chemical properties beyond their individual units. The development of nanofabrication tools enables precise structural defining of nanomaterials scalable to large areas. This dissertation focuses on plasmonic nanoparticle arrays that show unique diffractive coupling with lattice spacings engineered close to the wavelength of light....
- Keyword:
- Light-matter interactions, Metal nanoparticles, Plasmonic superlattices, Upconverting nanolasing, Nanoscale lasers, and Stretchable photonics
- Subject:
- Optics, Nanoscience, and Materials Science
- Creator:
- Wang, Danqing
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14605 and etdadmin_upload_661446
-
- Description:
- Scalable processing of well-defined interfaces is key not only for wider application of two-dimensional (2D) materials in technology but also for improved fundamental understanding. Atomic layer deposition has useful characteristics, especially self-limited growth at low temperatures, that make it well suited for the production of uniform interfaces. Related processes, such...
- Keyword:
- van der Waals epitaxy, 2D material, and atomic layer deposition
- Subject:
- Nanotechnology and Materials Science
- Creator:
- Moody, Michael
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 06/22/2022
- Date Created:
- 2022-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_889957 and http://dissertations.umi.com/northwestern:15979
-
- Description:
- There is considerable technical interest in the improvement of battery technology, as it would allow for the enhancement and realization of many different applications, including the continued miniaturization of portable computational devices, plug-in electric vehicles, and intermittent power storage. Lithium metal represents a theoretical limit on the anode energy density...
- Keyword:
- battery, SEI, scanning probe, mechanical, and lithium
- Subject:
- Materials Science and Energy
- Creator:
- Campbell, Colin Thomas
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/01/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15275 and etdadmin_upload_764606
-
- Description:
- Elemental powder blends are an emerging alternative to prealloyed powders for high-throughput alloy design via additive manufacturing techniques due to their flexibility, low cost, and ease of customization. This dissertation investigates elemental alloying elements (Sc and Zr) which are high-melting and highly reactive, unlike previous work which focused on more...
- Keyword:
- additive manufacturing, in situ diffraction, elemental blends, laser powder-bed fusion, aluminum, and creep
- Subject:
- Materials Science
- Creator:
- Glerum, Jennifer Anne
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/16/2023
- Date Created:
- 2022-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16304 and etdadmin_upload_936163
-
- Description:
- As demonstrated by efforts in graphene commercialization, scalable synthesis and high-quality material availability are primary limiting factors for the realization of technologies based on two-dimensional (2D) materials. Thus, in considering the fate of emergent 2D materials such as the metal chalcogenides, the challenge of scalable synthesis is a highly relevant...
- Keyword:
- 2D Materials, Pulsed Laser Deposition, Applied Sciences, Metal Chalcogenides, and Chemical Vapor Deposition
- Subject:
- Nanotechnology, Nanoscience, and Materials Science
- Creator:
- Bergeron, Hadallia
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/01/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15165 and etdadmin_upload_750151
-
- Description:
- Nanotechnology research broadly encompasses the exploration of the unique chemical,optical, electronic, or biological properties of materials with dimensions < 1 µm. Inorganic nanoparticles are one such class of materials, with properties that are exceptionally sensitive to particle size and structure. This is especially evident in the field of heterogeneous chemical...
- Keyword:
- Parallelized, Catalysis, Nanoreactor, Nanoparticle, and Synthesis
- Subject:
- Nanotechnology, Materials Science, and Chemical engineering
- Creator:
- Jibril, Liban
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 06/22/2022
- Date Created:
- 2022-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16023 and etdadmin_upload_899605
-
- Description:
- Soft materials in nature are formed through programmed self-assembly of biomolecules to create complex architectures and optimized physical properties. It is therefore a key challenge in biomaterials science and engineering to understand the principles that govern the structure and properties of such materials, and the interactions between their different components....
- Subject:
- Materials Science and Biomedical engineering
- Creator:
- Sangji, Mohammad Hussain
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 10/07/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_816157 and http://dissertations.umi.com/northwestern:15536
-
- Description:
- Transport along and across the grain boundaries of solid-state electrolytes has implications for a broad range of materials and in an equally broad range of technologies. Over the past 2-3 decades, a substantial body of literature has been developed to explain grain boundary transport properties within the context of space...
- Keyword:
- Grain Boundary Charge Transport, Oxide Electrolytes, Electron Holography, Impedance Spectroscopy, Atom Probe Tomography, and Space Charge Theory
- Subject:
- Applied physics and Materials Science
- Creator:
- Xu, Xin
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14848 and etdadmin_upload_686556
-
- Description:
- Nanoparticle synthesis is capable of producing particles with any combination of structure, chemistry, size, shape, and surface. All of the different combinations of these physical properties can produce nanoparticles with almost countless materials properties suited for many applications. Given this interest in using nanoparticles in so many different fields, including...
- Keyword:
- nanoparticle growth, thermodynamics, nanoparticles, kinetics, hydrothermal synthesis, and crystal growth
- Subject:
- Inorganic chemistry, Chemistry, and Materials Science
- Creator:
- Ly, Tiffany
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 10/07/2021
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15645 and etdadmin_upload_832870
-
- Description:
- In the late 2000’s, scientific studies in cultural heritage saw a great advancement in macro X-ray fluorescence (XRF) imaging of paintings. These images are used to generate elemental distribution maps, which aid in identifying chemical elements and paint pig- ments as well as their locations throughout the layers of the...
- Keyword:
- machine learning, x-ray fluorescence, and image processing
- Subject:
- Artificial intelligence, Materials Science, and Computer science
- Creator:
- Chopp, Henry Hayashi
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 08/23/2023
- Date Created:
- 2023-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_998414 and http://dissertations.umi.com/northwestern:16642
-
- Description:
- One of the central challenges in solid-state chemistry is synthetic control over structure. Owing to limited reactivity of Pb with transition metals at ambient pressure and high temperature as well as the variety of properties that emerge from the few known binary transition-metal–Pb compounds, this research focuses on accessing and...
- Subject:
- Chemistry and Materials Science
- Creator:
- Tamerius, Alexandra
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 10/07/2021
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_845128 and http://dissertations.umi.com/northwestern:15755
-
- Description:
- Materials science has been central to human advancement since time immemorial. There has always been curiosity around studying the processes required to extract materials, examine their structure, and ultimately tailor their properties to meet human needs. Over the last few centuries, the ability to tailor material properties was driven by...
- Keyword:
- Gaussian Process, Mixed Variable Machine Learning, Data Centric Design, Multicriteria Optimization, and Microstructure
- Subject:
- Materials Science, Statistics, and Design
- Creator:
- Iyer, Akshay
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/02/2022
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_851800 and http://dissertations.umi.com/northwestern:15801
-
- Description:
- This dissertation explores the fundamental science of flexoelectricity and its implications using a combined experimental and theoretical approach. I begin by introducing the flexoelectric effect and formalizing the basics of strain gradients, polarization, and flexoelectric coefficients. Next, I describe the development of a flexoelectric characterization system based upon three-point bending...
- Keyword:
- Oxides, First Principles, Triboelectricity, Flexoelectricity, and Surfaces
- Subject:
- Physics and Materials Science
- Creator:
- Mizzi, Christopher Adam
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 06/28/2021
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15527 and etdadmin_upload_815247
-
- Description:
- Polymer and polymer/ceramic composites known as bone cements are commonly used in musculoskeletal reconstructive surgeries where bone tissue fixation, reinforcement, or void filling may be needed. Polymethylmethacrylate, PMMA, was the initial (and currently only) FDA-approved bone cement for bone-void filling applications yet faces many inherent material-based challenges that impacts its...
- Keyword:
- Citrate-based biomaterials, V70, Hydroxyapatite, Bone Cement, Vertebral Body Fractures, and Polymethylmethacrylate
- Subject:
- Polymer chemistry, Materials Science, and Biomedical engineering
- Creator:
- Huddleston, Samantha
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 09/22/2022
- Date Created:
- 2022-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16143 and etdadmin_upload_915696
-
- Description:
- Discrete molecules, linear and branched polymers, and disordered cross-linked networks are well studied objects of chemical synthesis. However, two-dimensional polymers (2DPs) have been long missing from this continuum of molecular architectures, both in chemical synthesis and in Nature. Recently, new polymerization strategies and characterization methods have enabled the unambiguous realization...
- Keyword:
- Covalent Organic Frameworks, Controlled Polymerization, Organic Electronics, and Two-dimensional Polymers
- Subject:
- Polymer chemistry, Chemistry, and Materials Science
- Creator:
- Evans, Austin Michael
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/15/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_793170 and http://dissertations.umi.com/northwestern:15454
-
- Description:
- Additive manufacturing is a promising process that has the capability to build components with complex geometries for structural and biomedical applications. Due to the rapid and localized directional solidification of molten metallic alloys, unique phase transformations occur at the melt pool that can provide for components with greater strength and...
- Subject:
- Materials Science and Mechanical engineering
- Creator:
- Wolff, Sarah
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2018-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14448 and etdadmin_upload_626097
-
- Description:
- This thesis describes a series of fundamental studies that address the role of electrostatic interactions in modulating i) the permeability of the ligand shell of a colloidal quantum dot (QD) to an anionic redox probe; ii) the resulting yield of photoinduced electron exchange within the QD ‒ redox probe complex;...
- Keyword:
- electrostatic interactions, surface chemistry, quantum dots, and optical spectroscopy
- Subject:
- Physical chemistry, Nanoscience, and Materials Science
- Creator:
- He, Chen
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2018-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_613994 and http://dissertations.umi.com/northwestern:14389
-
- Description:
- Single-use plastic waste pollution will cause significant harm to the environment if left unaddressed. One possible mitigation strategy is to develop processes, e.g. catalytic hydrogenolysis, that can convert (i.e. upcycle) waste plastics into value-added products capable of participating in a circular economy. Platinum (Pt) catalysts on strontium titanate nanocuboid supports...
- Subject:
- Chemistry and Materials Science
- Creator:
- Peczak, Ian Lukasz
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 05/31/2023
- Date Created:
- 2023-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16513 and etdadmin_upload_983506
-
- Description:
- Thermoelectric devices convert between temperature gradients and electricity, implying numerous applications, such as powering exploratory space vehicles, industrial waste-heat recovery, and solid- state refrigeration. Thermoelectric devices consist of doped p-type and n-type semiconductor legs, and the overall device efficiency depends on the transport properties of these semiconductor materials. High-performing thermoelectric...
- Keyword:
- band engineering, electronic structure, density functional theory, thermoelectrics, group theory, and tight-binding
- Subject:
- Materials Science
- Creator:
- Brod, Madison K
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 05/31/2023
- Date Created:
- 2023-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16437 and etdadmin_upload_967109
-
- Description:
- Dilute Al-Sc-Zr-Si-based aluminum alloys retain their strength for long periods of time at elevated temperatures due to a dispersion of nanometric, coherent, and coarsening-resistant Al3(Sc,Zr) (L12 structure) nanoprecipitates that are formed upon aging. These alloys are attractive for replacement of dense steels and costly Ti alloys in the 250–400 °C...
- Keyword:
- L12 nanoprecipitates, Atom-probe tomography, Coarsening, High-temperature alloys, Creep, and Aluminum alloys
- Subject:
- Materials Science
- Creator:
- Michi, Richard Andrew
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/29/2020
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_718569 and http://dissertations.umi.com/northwestern:14999
-
- Description:
- Engineering heat transport in materials is essential for thermal management in a wide range of technologies, from batteries to thermoelectrics. Materials host a wide spectrum of heat-carrying phonons, which vary in their frequency, spatial extent, and degree of plane-wave character. This diversity in phonon properties leads to complex behavior, especially...
- Keyword:
- thermal modelling, thermal conductivity, semiconductors, phonons, and thermoelectrics
- Subject:
- Physics and Materials Science
- Creator:
- Gurunathan, Ramya
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/02/2022
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_856415 and http://dissertations.umi.com/northwestern:15824
-
- Description:
- Organic solar cells (OSC) are a next generation solar energy technology that offers the advantages of scalable fabrication, light weight, flexibility, and earth-abundant starting materials. Despite tremendous advances in OSC power conversion efficiency (PCE) over the last decade, active layer material selection and optimization is still largely empirical. In order...
- Keyword:
- Small molecule, Non Fullerene, Crystal Structure, Photovoltaic, and Organic solar Cells
- Subject:
- Chemistry, Materials Science, and Energy
- Creator:
- Swick, Steven Mitomu
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/28/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14961 and etdadmin_upload_712474
-
- Description:
- Self-assembly of colloidal particles at the nano- and microscale has been a powerful tool for producing structures with emergent properties in applications ranging from electro-mechanical systems to photonics and biomedical devices. Great success has been achieved in experiments, where a variety of exotic phases have been discovered and even reconfigurable...
- Keyword:
- Soft materials, Computer simulation, Nanoparticles, Self-assembly, and Electrostatics
- Subject:
- Materials Science and Computational physics
- Creator:
- Wang, Ziwei
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/01/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_747162 and http://dissertations.umi.com/northwestern:15154
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- Description:
- The field of materials discovery is undergoing an unprecedented transition from laboratory tocomputer. Behind this transition is the new ability to accurately compute material properties, especially energetic stability, from first principles with density functional theory (DFT). However, DFT remains computationally expensive, and DFT-based materials discovery is intractable, especially in high...
- Keyword:
- High throughput, Inorganic compounds, Big data, Density functional theory, Materials discovery, and Machine learning
- Subject:
- Materials Science, Condensed matter physics, and Computational chemistry
- Creator:
- Griesemer, Sean Darius
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 05/31/2023
- Date Created:
- 2023-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:16606 and etdadmin_upload_986816
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- Description:
- Rapid changes in global climate are pushing nations to reduce CO2 emissions and adopt clean energy technologies for renewable energy generation and storage. As wind and solar are implemented worldwide, a commensurate response in energy storage will need to be installed to meet fluctuations in peak energy demands and generation...
- Keyword:
- Fuel cells, Solid Oxide Fuel Cells, SOFC, Solid Oxide Electrolysis Cells, Electrochemistry, and Energy
- Subject:
- Materials Science, Energy, and Engineering
- Creator:
- Lu, Matthew Yunching
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_685843 and http://dissertations.umi.com/northwestern:14817
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- Description:
- Water vapor condenses into liquid water when it encounters a cold surface. If the surface temperature is sufficiently low, freezing follows the condensation step, and the process is holistically referred to as condensation frosting. Both phase change processes are fundamental to many industries ranging from water harvesting, thermal management, solar...
- Keyword:
- Frosting, Condensation, Phase Change, Mass Transport, Diffusion, and Droplet
- Subject:
- Applied physics and Materials Science
- Creator:
- Yao, Yuehan
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/29/2020
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:14997 and etdadmin_upload_718499
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- Description:
- Recent advances in high-performance computing have resulted in massive databases of materials properties calculated with techniques such as ab initio density functional theory. In fact, some of the largest of such databases have calculations of nearly all distinct, ordered, experimentally-reported compounds. This thesis discusses the application of data in one...
- Keyword:
- high-pressure, OQMD, complex networks, density functional theory, high-throughput, and materials discovery
- Subject:
- Materials Science and Computational physics
- Creator:
- Ishwar Hegde, Vinay
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/01/2021
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_780845 and http://dissertations.umi.com/northwestern:15403
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- Description:
- Polymers occupied nearly every facet of our daily lives, and enhancing their mechanical and fracture properties has long been an important topic in the field of polymer science. Based on the various need in applications, polymers are designed to have a range of characteristics such as tackiness, optical properties, mechanical...
- Keyword:
- Adhesive, Fatigue, Elastomer, Fracture, Composite, and Mechanical Properties
- Subject:
- Materials Science
- Creator:
- Chen, Qihua
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 08/23/2023
- Date Created:
- 2023-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_1004779 and http://dissertations.umi.com/northwestern:16673