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-
- Description:
- Thermoelectric materials are of particular interest in a variety of fields because of their ability to directly convert heat to electricity (and vice versa), however, they struggle to gain widespread adoption because of their low efficiency. A common strategy in the field of thermoelectricity is to introduce material defects into...
- Keyword:
- Mesoscale, Doping, Thermoelectric, EBSD, Electron Microscopy, and Semiconductor
- Subject:
- Materials Science and Energy
- Creator:
- Grovogui, Jann Albert
- 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:15371 and etdadmin_upload_779059
-
- Description:
- High performance polymers and their composites have wide ranging application in advanced and emerging material systems. The macroscale performance of these advanced materials is often defined by interfaces that induce nanoscale changes in the microstructure or molecular conformations (termed the ‘interphase’) of the polymer. Atomic force microscopy (AFM) is an...
- Keyword:
- Indentation, Nanoconfinement, Polymers, Atomic Force Microscopy, Nanocomposites, and Additive Manufacturing
- Subject:
- Nanotechnology, Materials Science, and Mechanical engineering
- Creator:
- Collinson, David William
- 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:15360 and etdadmin_upload_775260
-
- Description:
- Given directives such as the UN Global Goals targeting sustainable development, the research presented herein makes but a small contribution to the advancement of alternative energy technologies. Nevertheless, the present work was largely motivated to address specific points of intrigue within the thermoelectrics community. The general principles demonstrated, however, may...
- Keyword:
- Heat Capacity, Thermal Conductivity, Thermoelectric, Thermodynamics, Thermal Expansion, and Phase Transition
- Subject:
- Physics, Materials Science, and Thermodynamics
- Creator:
- Agne, Matthias 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:15127 and etdadmin_upload_743939
-
- Description:
- An extensive set of functional electronic properties depends on the electronic structure. These properties are directly connected to the reciprocal-space representation of electronic structure. However, there is a complementary, real-space perspective that is described by combinations of atomic orbitals. Atomic orbitals are the components of electronic structures, analogous to how...
- Subject:
- Materials Science and Mechanical engineering
- Creator:
- Dylla, Maxwell Thomas
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/01/2021
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15203 and etdadmin_upload_758137
-
- Description:
- Structural colors originate from the interaction between the incident light and a surface with periodic submicron structures. They enable the creation of a spectrum of nonfading colors, potentially replacing toxic metal oxides and conjugated organic pigments. However, significant challenges remain, including lack of contrast needed for the complete gamut of...
- Subject:
- Materials Science
- Creator:
- Hu, Ziying
- 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:15354 and etdadmin_upload_774230
-
- Description:
- A series of theories and models are developed and used to investigate the growth of protective oxide films on metal and alloy surfaces for cases in which Wagner's classical model of oxidation does not hold. First, irreversible thermodynamics is applied to formulate a model for the outward growth of rocksalt...
- Keyword:
- corrosion, mathematical modeling, irreversible thermodynamics, and high temperature oxidation
- Subject:
- Materials Science and Applied mathematics
- Creator:
- Ramanathan, Rohit
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/01/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_757043 and http://dissertations.umi.com/northwestern:15201
-
- Description:
- Part I: Design of Photo-Responsive Molecules towards Biomedical ApplicationsThe use of light to control systems provides numerous advantages such as spatiotemporal precision, non-invasive penetration, and precise energy input. Specifically, molecules that undergo photoinduced cleavage, photoremovable protecting groups (PPGs) have emerged as an active area of research due to their broad...
- Subject:
- Polymer chemistry, Chemistry, and Materials Science
- Creator:
- Wang, Xiaodi
- 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:15393 and etdadmin_upload_780358
-
- 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:
- 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:
- 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:
- 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:
- 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:
- 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:
- 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:
- 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:
- 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:
- 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
-
- 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
-
- Description:
- There is no group of materials as diverse, complex, and ubiquitous as polymers. From plastic bags, to rubber tires, electronics, food packaging, water filtration and even aerospace applications, the penetration of polymer materials into all aspects of life make them very important materials throughout all engineering fields. However, this breadth...
- Keyword:
- Characterization, Materials Design, Polymer, Composite, and Mechanical Properties
- Subject:
- Mechanics, Polymer chemistry, and Materials Science
- Creator:
- Eaton, Matthew David
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/15/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_763586 and http://dissertations.umi.com/northwestern:15243
-
- Description:
- The advancement of nanotechnology is at least partially dependent on the ability to synthesize and arrange complex nanostructures on a substrate. Nanolithography, or the patterning of materials at the sub-micrometer length-scale, has been traditionally performed using a number of methods such as conventional photolithography, ion-beam etching, and electron-beam lithography. While...
- Keyword:
- Scanning Probe, Nanolithography, Lithography, Electrochemical, Polymer, and Hydrogel
- Subject:
- Nanotechnology, Nanoscience, and Materials Science
- Creator:
- Golnabi, Rustin
- 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:15442 and etdadmin_upload_791089
-
- Description:
- NiTi shape memory alloy (SMA) has drawn a great deal of attention for its various applications in the medical field (orthodontics, cardiovascular stents technology, etc.) and in other engineering fields (aerospace, aircraft, automotive, etc.) as it shows shape memory effect, superelasticity and biocompatibility. The fatigue-related issues, however, are pronounced in...
- Subject:
- Materials Science
- Creator:
- Liu, Chuan
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/15/2021
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_794898 and http://dissertations.umi.com/northwestern:15461
-
- Description:
- Physiochemical phenomena in aqueous systems, such as corrosion, catalysis, and energy storage, are driven by the molecular-scale interactions of ionic species with charged solid surfaces. In particular, an electrical double layer (EDL) of ions forms within nanometers of a charged surface. The properties of the EDL have been explored from...
- Keyword:
- Electrical Double Layer, First Principles Molecular Dynamics, X-ray Reflectivity, Solid/Water Interfaces, and Resonant Anomalous X-ray Reflectivity
- Subject:
- Applied physics and Materials Science
- Creator:
- Harmon, Katherine
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/15/2021
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15471 and etdadmin_upload_796475
-
- Description:
- The effect of interfaces in solids on the overall charge transport properties has become a topic of growing importance for energy materials such as thermoelectrics. In some polycrystalline thermoelectric materials, the performance near room temperature is significantly limited due to thermally-activated electrical conductivity near room-temperature, which can be attributed to...
- Keyword:
- Contact resistance, Grain boundary, Charge transport model, Thermoelectric, Mg3Sb2, and NMC
- Subject:
- Physics and Materials Science
- Creator:
- Kuo, Jimmy
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/15/2021
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15489 and etdadmin_upload_797891
-
- Description:
- Non-planar and curved architectures of otherwise flat 2D materials present an important paradigm for nanoscale analysis and design of emergent material properties. Atomically-thin transition metal dichalcogenides (TMDs) have emerged at the forefront of the 2D materials field in recent years largely due to their attractive and tunable chemical, optical, and...
- Subject:
- Nanotechnology, Nanoscience, and Materials Science
- Creator:
- DiStefano, Jennifer G
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/15/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_788467 and http://dissertations.umi.com/northwestern:15438
-
- Description:
- Melanin is a functional biopolymer most commonly associated with human skin pigmentation, where it serves as a radiation protection agent, shielding us from the harmful effects of UV radiation. However, melanin is also present in human ears, eyes, hair, and brains, serving a variety of functions. In fact, melanin...
- Keyword:
- porosity, toxin adsorption, nanoparticles, fungal, melanin, and radiation protection
- Subject:
- Materials Science and Biochemistry
- Creator:
- McCallum, Naneki C.
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/15/2021
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- http://dissertations.umi.com/northwestern:15478 and etdadmin_upload_797429
-
- Description:
- Superconductivity is a fascinating manifestation of quantum mechanics on a macroscopic scale that has led to greater insights of the strongly correlated physics of a large number of interacting electrons ever since its discovery $\sim$ 100 years ago in elemental Hg. The unconventional superconductors that are based on uranium offer...
- Keyword:
- Crystal Growth, Uranium Superconductors, Unconventional Superconductors, Time-Reversal Symmetry-Breaking, Superconducting Vorticies, and Ferromagnetic Superconductors
- Subject:
- Materials Science, Condensed matter physics, and Low temperature physics
- Creator:
- Avers, Keenan Edward
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/15/2021
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_794332 and http://dissertations.umi.com/northwestern:15459
-
- Description:
- Exploratory phase stability analysis in Materials Science has two primary goals: (a) Characterizing the evolution of the materials single phase field in composition space to identify solubility and electronic dopability limits and (b) Accelerated prediction of new phases of technological importance. In this thesis we reorganize defect theory --- the...
- Subject:
- Materials Science
- Creator:
- Anand, Shashwat
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/15/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_794325 and http://dissertations.umi.com/northwestern:15457
-
- Description:
- The era of quantum information science (QIS) can usher revolutionary new capabilities ranging from quantum computation to quantum sensing. At the core of these technologies is the fundamental unit of QIS, the quantum bit or qubit. The power of qubits over their classical counterparts lies in their ability to be...
- Keyword:
- Dynamic nuclear polarization, Metal-organic frameworks, Electron paramagnetic resonance, Quantum information science, Qubits, and Spin-spin dynamics
- Subject:
- Inorganic chemistry and Materials Science
- Creator:
- Yu, Chung-Jui
- 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:15436 and etdadmin_upload_788011
-
- Description:
- Two-step, solar thermochemical water splitting using nonstoichiometric oxides has emerged as an attractive approach for large-scale hydrogen production. Perovskite-structured oxides, with their wide tunability, offer the potential for high fuel productivity at moderate operating temperatures. Given the vast chemical space, the materials development effort is carried out here in combination...
- Keyword:
- Redox Thermodynamics and Material's Kinetics, Thermochemical Hydrogen Production, Oxygen Nonstoichiometry, DFT Computational Predictions, Inorganic Perovskites, and Thermo-kinetic Controlled Dynamics
- Subject:
- Materials Science, Chemical engineering, and Energy
- Creator:
- Qian, Xin
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/15/2021
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_797495 and http://dissertations.umi.com/northwestern:15479
-
- Description:
- Surface patterns that can reconfigure under external stimuli are important for tailoring diverse properties such as surface adhesion, optical transmittance, and wettability depending on the feature size and orientation. Wrinkling a stiff skin layer on a pre-strained elastomer substrate has emerged as a method to create responsive structures without using...
- Keyword:
- Two-dimensional materials, Surface instabilities, Surface engineering, Thin films, Nanofabrication, and Soft materials
- Subject:
- Materials Science
- Creator:
- Rhee, Dongjoon
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/15/2021
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_795810 and http://dissertations.umi.com/northwestern:15467
-
- 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:
- 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:
- 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:
- Electrochemical cell devices are increasingly being sought for energy conversion and storage applications due to their high efficiencies and their potential for operating free of greenhouse gas (GHG) emissions. Solid Acid Electrochemical Cells (SAECs), which most commonly employ CsH2PO4 (CDP) as the electrolyte component, are uniquely suited to meet the...
- Keyword:
- Cesium Dihydrogen Phosphate, Catalysis, Ammonia, Hydrogen, and Electrochemistry
- Subject:
- Chemistry, Materials Science, and Energy
- Creator:
- Plymill, Austin Blake
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/15/2021
- Date Modified:
- 04/15/2021
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_796377 and http://dissertations.umi.com/northwestern:15469
-
- 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:
- Mixed-dimensional heterojunctions between two-dimensional (2D) materials and organic semiconductors is a rapidly growing field. This is motivated by the promise of leveraging the extraordinary properties of 2D materials with the synthetic tunability and reconfigurability of organic electronics, allowing the realization of new physics or devices that are not possible in...
- Keyword:
- organic - inorganic hybrid, heterostructures, mixed dimensional, and 2d materials
- Subject:
- Nanoscience, Chemistry, and Materials Science
- Creator:
- Amsterdam, Samuel
- 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:15597 and etdadmin_upload_820903
-
- Description:
- Ordered arrays of metallic nanoparticles (NPs) are a promising platform for technological applications and fundamental investigations due to their ability to excite surface lattice resonances (SLRs). SLRs can support extremely high local electric fields that have been used to realize exotic physical phenomena. The open cavity architecture lends itself to...
- Keyword:
- Photonics, Protein Hydrogel, Plasmonics, Titanium Nitride, Nanofabrication, and Surface Lattice Resonance
- Subject:
- Nanotechnology, Optics, and Materials Science
- Creator:
- Reese, Thaddeus Allen
- 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:15496 and etdadmin_upload_799920
-
- Description:
- Complex microstructures are ubiquitous in nature. The evolution of these microstructures alters their morphology and topology and thus very often dictates material properties, such as mechanical, electronic, thermal, and magnetic properties. Thus, in order to predict and control material properties, it is essential to have robust and efficient techniques to...
- Subject:
- Materials Science
- Creator:
- Elder, Kate Lauren Maud
- 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:15525 and etdadmin_upload_814831
-
- Description:
- The crystal structure of chalcogenides can vary from simple, ubiquitous structures of rock salt and zinc blende to unique structure types from the intricate packing of complex anionic building blocks. Exploratory synthesis and structural studies of novel chalcogenides containing these complex anions will augment the understanding of bonding in chalcogenides....
- Keyword:
- neutron detectors, synthesis science, chalcoborates, chalcophosphates, framework materials, and 2D materials
- Subject:
- Materials Science
- Creator:
- Chica, Daniel George
- 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:15563 and etdadmin_upload_818510
-
- 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:
- 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:
- 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:
- 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:
- Over the last few years, there has been a transition away from traditional engineering materials to new advanced materials that exhibit complex architectures with improved mechanical properties. Most of the inspiration for these new materials comes from nature, where organisms have evolved an immense variety of macro and nanoscale shapes...
- Keyword:
- Catch bond, Biomimicry, Self-strengthening , Non-bonded interactions, Biomimetic systems, and Synthetic
- Subject:
- Molecular physics, Materials Science, and Biophysics
- Creator:
- Dansuk, Kerim Can
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 10/06/2021
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_843657 and http://dissertations.umi.com/northwestern:15721
-
- 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:
- The demand for low cost, unconventional electronics requires new materials with unique characteristics that the traditionally used silicon-based technologies cannot provide. Metal oxide semiconductors, such has amorphous indium gallium zinc oxide (a-IGZO), have made impressive strides as alternatives to amorphous silicon for electronics applications. However, to achieve the full potential...
- Keyword:
- Combustion processing, Thin-film transistor, SANDs, and Metal Oxides
- Subject:
- Inorganic chemistry, Chemistry, and Materials Science
- Creator:
- Stallings, Katie Lynn
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 10/07/2021
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_844267 and http://dissertations.umi.com/northwestern:15733
-
- Description:
- This dissertation explores ways to utilize physical parameters at the nanoscale interface to control the properties of mixed-dimensional heterojunctions (MDHJs). MDHJs combine the desirable properties of different classes of low-dimensional nanomaterials (materials that are quantum confined in at least one dimension). While MDHJs have achieved superlative performance for a variety...
- Keyword:
- photophysics, mixed-dimensional, low-dimensional, time-resolved spectroscopy, and nanomaterials
- Subject:
- Physical chemistry, Nanoscience, and Materials Science
- Creator:
- Padgaonkar, Suyog
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 10/07/2021
- Date Created:
- 2021-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_827806 and http://dissertations.umi.com/northwestern:15611
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