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-
- Description:
- Two-dimensional (2D) materials and heterostructures have attracted significant attention for a variety of nanoelectronic and optoelectronic applications. At the atomically thin limit, the material characteristics and functionalities are dominated by surface chemistry and interface coupling. Therefore, methods for comprehensively characterizing and precisely controlling surfaces and interfaces are required to realize...
- Keyword:
- borophene, defect, scanning tunneling microscopy, heterostructure, two dimensional materials, and surface science
- Subject:
- Nanotechnology, Applied physics, and Materials Science
- Creator:
- Liu, Xiaolong
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2018-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_622476 and http://dissertations.umi.com/northwestern:14423
-
- Description:
- Use of bio-renewable polysaccharides to produce materials with a high technological impact has gained a lot of attention recently. Efforts have been made, for example to produce triboelectric generators from cotton, as well as, nanostructures of chitosan gels for drug delivery. Another well-known example is the use of β-Cyclodextrin (β...
- Keyword:
- contaminant, water, air, polysaccharide, cellulose, and cyclodextrin
- Subject:
- Organic chemistry and Materials Science
- Creator:
- Alzate-Sanchez, Diego Mauricio
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_673215 and http://dissertations.umi.com/northwestern:14731
-
- Description:
- Deformation in materials with a hierarchical microstructure is expected to be complex because of the interaction between the units that form such a microstructure. The complexity of deformation would be even higher when additional inelastic deformation modes are active in such materials, apart from traditional elastic and plastic deformation modes....
- Keyword:
- Inelastic Mechanisms, Shape Memory Alloys, Multiscale, Smart Materials, Deformation Behvior, and Modeling
- Subject:
- Mechanics, Materials Science, and Engineering
- Creator:
- Paul, Partha P
- 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:14333 and etdadmin_upload_609177
-
- Description:
- This dissertation presents a comprehensive study of thin-film LiMn2O4 (LMO) cathodes applied in lithium ion batteries (LIBs). The primary aim was to establish fundamental understanding of the relationship between interfacial LMO chemistry/electrochemistry and its detrimental drawback, i.e. fast capacity fade over long term cycling, and then develop effective mitigation methods....
- Keyword:
- Surface coating, Thin film, Lithium ion battery, LiMn2O4, Interfacial electrochemistry, and Capacity loss
- Subject:
- Nanotechnology, Materials Science, and Energy
- Creator:
- Yu, Xiankai
- 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:14706 and etdadmin_upload_667791
-
- Description:
- Semiconductor nanowires, such as group IV and III-V nanowires, shows distinct electrical, optical and mechanical properties from their bulk counterparts due to their nanoscale size and 1-D morphology. For example, the quantum confinement effect modulates the band gap of a semiconductor nanowire when its diameter approaches or below the exciton...
- Keyword:
- atom-probe tomography, doping, nanowire, silicon, CVD, and strain
- Subject:
- Nanotechnology, Nanoscience, and Materials Science
- Creator:
- Sun, Zhiyuan
- 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:14424 and etdadmin_upload_622561
-
- Description:
- Solvent-rich polyelectrolyte complexes display a wide range of rheological properties, when different environmental parameters are applied. Due to the low energy barrier of the complexation (~10 kT), these materials possess tunable properties, with the states of these materials varying from Newtonian liquids to very tough hydrogels. This thesis aims to...
- Keyword:
- polyelectrolyte, thermo-thickening, fracture, gels, and viscoelasticity
- Subject:
- Materials Science
- Creator:
- Chen, Yaoyao
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_662844 and http://dissertations.umi.com/northwestern:14666
-
- Description:
- Connecting structure and function in nanoscale engineered materials and devices relies on the analysis of the fundamental arrangement of matter, frequently under dynamic conditions. The demand to image structures at fundamental length scales has touched inorganic materials, biology, and frequently hybrid hard/soft materials with unique phenomena driven by heterogeneous components....
- Keyword:
- Imaging, Materials Imaging, Soft Materials, Crystallography, Machine Learning, and Electron Microscopy
- Subject:
- Nanoscience, Materials Science, and Computer science
- Creator:
- Hujsak, Karl
- 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:14515 and etdadmin_upload_638887
-
- Description:
- The Controlled, Site-Isolated Synthesis of Polyelemental Nanostructures in Polymer Nanoreactors Pengcheng Chen Polyelemental nanoparticles are an attractive class of materials due to their potential applications, which span the fields of catalysis, plasmonics, electronics, magnetics, targeted drug delivery, and bio-imaging. However, conventional synthetic methods for such structures are limited, especially when...
- Keyword:
- Nanostructures, Catalysis, Nanoparticles, Polyelemental, Nanoreactors, and Polymer
- Subject:
- Inorganic chemistry, Chemistry, and Materials Science
- Creator:
- Chen, Pengcheng
- 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:14466 and etdadmin_upload_627177
-
- Description:
- Localized corrosion involves the selective attack of a metal at a small, exposed site. This can be particularly devastating for load-bearing structures like bridges, which can fail catastrophically even with very little material loss. Unfortunately, such corrosion is very hard to prevent, predict, and detect. Corrosion can be prevented by...
- Keyword:
- liquids, coatings, and self-healing
- Subject:
- Materials Science
- Creator:
- Lim, Alane Tarianna Ocampo
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_663032 and http://dissertations.umi.com/northwestern:14674
-
- Description:
- The study of magnetic frustration has attracted considerable interest in the fields of materials science and condensed matter physics. Artificial Spin Ices (ASIs) are the primary systems in which magnetic frustration has been studied. To date, most studies on ASIs have been on fully periodic systems. In this thesis, we...
- Keyword:
- Lorentz Microscopy, Magnetic Materials, Artificial Spin Ice, and Magnetic Imaging
- Subject:
- Materials Science
- Creator:
- Brajuskovic, Vuk
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_677615 and http://dissertations.umi.com/northwestern:14759
-
- Description:
- Plasmonic metasurfaces are leading the development of next-generation optical devices with unprecedented compactness and functionality. In contrast to bulk refractive optics, these planar surfaces manipulate light with rationally designed subwavelength building blocks. This thesis focus on how emerging materials and design methods advance the eld of metasurfaces. Chapter 1 reviews...
- Keyword:
- Evolutionary algorithms, Plasmonics, Metasurfaces, Reconfigurable lenses, and Predictive design
- Subject:
- Materials Science
- Creator:
- Hu, Jingtian
- 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:14543 and etdadmin_upload_640950
-
- Description:
- Organic semiconductors are an active area of research with great promise for delivering next generation electronics and clean energy technologies. As the field matures, understanding the connection between molecular structure, materials’ properties, and device performance will be critical in finding the right material for an intended application. An effective strategy...
- Keyword:
- solar cells, diketopyrrolopyrrole, transistors, organic semiconductors, polymers, and fluorination
- Subject:
- Chemistry and Materials Science
- Creator:
- Leonardi, Matthew John
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_660666 and http://dissertations.umi.com/northwestern:14589
-
- Description:
- Increasing industrialization and the resulting negative environmental impacts highlight the need to develop alternative renewable energy sources. The Sun is a massive source and organic solar cells are a growing field of study. As new materials are synthesized, the efficiencies of organic solar cells continue to grow, but without an...
- Keyword:
- x-ray scattering, transient absorption, and organic solar cell
- Subject:
- Physical chemistry, Chemistry, and Materials Science
- Creator:
- Lou, Sylvia Jen-Ming
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2018-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_626768 and http://dissertations.umi.com/northwestern:14458
-
- Description:
- One of the grand challenges in materials chemistry and nanochemistry is the development of functional materials through ordered, hierarchical structures using synthetic building blocks. Nature has done this through evolution of molecular components such as nucleic acids, saccharides, lipids, amino acids, and inorganic crystals. The precise spatial positioning of these...
- Keyword:
- Hierarchical Order, Responsive Materials, Peptide Amphiphiles, Self-Assembly, Materials chemistry, and Nanochemistry
- Subject:
- Chemistry and Materials Science
- Creator:
- Chin, Stacey Megan
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_639807 and http://dissertations.umi.com/northwestern:14525
-
- Description:
- This thesis centers around the development and application of novel high throughput lithography tools. These advances help: 1) establish the field of nanocombinatorics, where massive libraries (termed megalibraries) of materials can be prepared in a positionally encoded manner and then screened for functional activity, and 2) advance stereolithographic 3D printing...
- Keyword:
- Scanning Probe, Nanolithography, 3D Printing, Lithography, Combinatorial Libraries, and Additive Manufacturing
- Subject:
- Nanotechnology, Materials Science, and Chemical engineering
- Creator:
- Hedrick, James Lupton
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_662564 and http://dissertations.umi.com/northwestern:14647
-
- Description:
- Functional electronic materials are difficult to design due to the complex interplay among chemistry, atomic structure, and electrical properties. This dilemma is further amplified in transition metal compounds which can defy the band-theory description of non-correlated electrons. Exploring the vast possible design space completely with experiments or first-principles simulations is...
- Keyword:
- Transition metal oxides, Metal-insulator transition, Machine learning, and Data science
- Subject:
- Materials Science
- Creator:
- Wagner, Nicholas Adam
- 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:14800 and etdadmin_upload_685025
-
- Description:
- Biomaterials have immense potential for studying fundamental biological processes and developing therapies to help regenerate or replace the structure and function of injured tissues. In order to accomplish this, they need to be designed to mimic the structure and function of Nature’s most important material, the extracellular matrix (ECM) surrounding...
- Keyword:
- Peptide Amphiphile, Growth Factor, Aptamer, Biomaterials, Self-assembly, and Extracellular Matrix
- Subject:
- Materials Science
- Creator:
- Serrano, Christopher
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_681720 and http://dissertations.umi.com/northwestern:14779
-
- Description:
- The dissertation systematically delineates the mechanically-guided deterministic assembly of three-dimensional (3D) mesostructures by compressive buckling, covering topics from mechanics concepts, design and analysis, fabrication techniques, to application opportunities. The development of approaches to form complex 3D functional mesostructures in advanced materials is a topic of broad interest, thanks to the...
- Subject:
- Materials Science, Mechanical engineering, and Civil engineering
- Creator:
- Luan, Haiwen
- 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:14682 and etdadmin_upload_663249
-
- Description:
- SAMDI-MS (Self-Assembled Monolayers for MALDI-TOF Mass Spectrometry) couples the use of chemically-defined self-assembled monolayers of alkane thiolates on gold surfaces with MALDI-TOF mass spectrometry for rapid characterization of the surfaces. Reactions performed on the surfaces can be quantified directly by detection of the reaction substrates and products. This rapid detection...
- Keyword:
- SAMDI, mass spectrometry, bioassay, chromodomains, cell-free reactions, and microfluidics
- Subject:
- Analytical chemistry, Materials Science, and Biochemistry
- Creator:
- O'Kane, Patrick Thomas
- 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:14615 and etdadmin_upload_661860
-
- Description:
- Electrostatic interactions mediated by ionic environments play a central role in physical processes across materials science, chemistry and biology. Key biological phenomena, such as the condensation and packaging of DNA, ion transport across cellular membranes and the enzymatic action of proteins, rely on the complex interplay between nanoscale electrostatic, osmotic...
- Subject:
- Physics and Materials Science
- Creator:
- Krishnamoorthy, Kurinji
- 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:14487 and etdadmin_upload_632859
-
- Description:
- Colloidal crystal engineering with DNA offers new opportunities for materials scientists to build and program the structures of superlattices beyond what can be accomplished in Nature with atomic crystal lattices. Thus far, such materials primarily have been studied for their optical properties due to the insulating nature of the DNA...
- Keyword:
- Nanoparticles, Self-Assembly, Surface Modification, and Colloidal Crystal Engineering
- Subject:
- Nanotechnology, Nanoscience, and Materials Science
- Creator:
- Oh, Taegon
- 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:14533 and etdadmin_upload_640128
-
- Description:
- The heart of computational materials science lies in providing fundamental insights and understanding of materials behavior and properties across different scales. The significance of this task is highlighted by the Materials Genome Initiative and the emergence of computational tools and frameworks such as materials by design, microstructure sensitive design, and...
- Keyword:
- random Process, Multiscale simulation, Microstructure, Gaussian process, and Uncertainty
- Subject:
- Materials Science, Statistics, and Mechanical engineering
- Creator:
- Bostanabad, Ramin
- 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:14508 and etdadmin_upload_638165
-
- Description:
- Nucleic acids not only are the building blocks of life but also a class of attractive macromolecular therapeutics. However, the delivery of therapeutic oligonucleotides into cells has been a major challenge due to their large size and highly negatively charged backbone. Spherical nucleic acids (SNAs) are a class of emerging...
- Keyword:
- Nanomedicine, Gene regulation, and Drug delivery
- Subject:
- Materials Science, Biomedical engineering, and Chemical engineering
- Creator:
- Zhu, Shengshuang
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 02/12/2020
- Date Created:
- 2019-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_672179 and http://dissertations.umi.com/northwestern:14728
-
- Description:
- Non-covalent and ion-specific interactions in the context of charged polymers are ubiquitous in nature and in synthetic applications. For example, mussels utilize metal-coordinate bonds to form tough underwater adhesion to a wide range of substrates. The sandcastle worm uses coacervation of oppositely charged polymers to build robust structures for self-defense....
- Keyword:
- Coacervate, Polyelectrolytes, Polymer Mechanics, Quartz Crystal Microbalance, Oil/Water Interface, and Coatings
- Subject:
- Polymer chemistry and Materials Science
- Creator:
- Sadman, Kazi
- 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:14664 and etdadmin_upload_662829
-
- 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:
- 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:
- 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:
- 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:
- 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:
- 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:
- 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:
- 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:
- 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:
- 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:
- 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
-
- Description:
- Modeling the mechanical performance of metal produced with additive manufacturing (AM) has proven to be a challenging task. In the as-built state, these materials have been shown to exhibit strong heterogeneity and anisotropy. Even after post-processing, such as heat treatment or hot isostatic pressing and depending on the alloy, some...
- Keyword:
- Simulations, Additive manufacturing, Mechanical performance, and Solid mechanics
- Subject:
- Mechanics, Materials Science, and Mechanical engineering
- Creator:
- Kafka, Orion Landauer
- 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:14952 and etdadmin_upload_708678
-
- 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:
- Low-dimensional materials have emerged as a promising platform for ultrathin electronic and optoelectronic devices. The span of electronic properties covers the spectrum from metallic through small and medium bandgap semiconductors to large bandgap insulators, providing all the necessary components to fabricate a variety of devices. Compared to bulk-semiconductor based devices,...
- Keyword:
- Gaussian, self-aligned, spiking neuron, antiambipolar, low-dimensional materials, and van der Waals heterojunction
- Subject:
- Applied physics, Electrical engineering, and Materials Science
- Creator:
- Beck, Megan
- 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:14986 and etdadmin_upload_717678
-
- Description:
- Superalloys strengthened by γ′(L12)-precipitates in γ(f.c.c.)-matrix exhibit superior high temperature mechanical properties and environmental resistance over long periods of operation, making them ideal candidates for aerospace and energy conversion applications. The emerging class of superalloys based on Co-Al-W ternary system was identified with a melting temperature 50-100 ˚C higher than...
- Keyword:
- Microstructural evolution, Co-based superalloys, Atom-probe tomography, Phase-field, Mechanical properties, and Creep
- Subject:
- Materials Science
- Creator:
- Chung, Ding-Wen
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 04/29/2020
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_717986 and http://dissertations.umi.com/northwestern:14989
-
- 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:
- 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
-
- Description:
- The high-temperature oxidation/reduction behaviors of iron and its oxides are important to a variety of energy conversion and storage technologies, such as the solid-oxide iron-air battery and chemical looping combustion. The useful lifetime of iron redox materials is limited, however, by structural degradation arising from (i) sintering, accelerated by phase...
- Subject:
- Materials Science
- Creator:
- Wilke, Stephen
- 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:15073 and etdadmin_upload_741055
-
- Description:
- The effect of Alkali-Silica Reaction (ASR) on concrete mechanical behavior and the multi-physics considerations that come along are highly complex. Hydration and other chemical reactions occur at the micrometer scale. Hygro-thermal phenomena and concrete cracks due to ASR are typically studied at the meso-scale, i.e. at the aggregate level. At...
- Subject:
- Mechanics, Materials Science, and Civil engineering
- Creator:
- Pathirage, Madura
- 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:15090 and etdadmin_upload_742317
-
- Description:
- As conventional electronic materials approach the device scaling limits, new types of materials and structures have been examined for potential use in future electronic and optoelectronic applications including transistors, light emitting diodes, and solar cells. In recent years, atomically thin or two-dimensional (2D) transition metal dichalcogenide (TMD) materials have emerged...
- Keyword:
- electron microscopy, heterostructures, electronic properties, grain boundaries, 2d materials, and interfaces
- Subject:
- Materials Science
- Creator:
- MURTHY, AKSHAY ARUN
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 01/21/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_730816 and http://dissertations.umi.com/northwestern:15038
-
- Description:
- The commercial success of personal computing has led to the rapid creation and proliferation of diverse electronic systems including desktops, laptops, tablets, mobile devices, and embedded systems. For the past five decades, silicon has served as the base material for computing electronics. However, with increasing demand for unconventional electronics (e.g.,...
- Keyword:
- Amplifiers, Random number generator, Internet of Things, Transistors, Electronic, and Carbon nanotubes
- Subject:
- Electrical engineering and Materials Science
- Creator:
- Gaviria Rojas, William A
- Owner:
- Scholarly Digital Publishing
- Language:
- en
- Date Uploaded:
- 01/21/2021
- Date Created:
- 2020-01-01
- Resource Type:
- Dissertation
- Alternate Identifier:
- etdadmin_upload_743198 and http://dissertations.umi.com/northwestern:15110
-
- Description:
- The complex structure of typical heterogeneous catalysts, where nanoparticles of active material are dispersed onto the surface of a thermally stable support with a high surface area, complicates the understanding of how the support can affect the resulting catalyst structure and properties. Using well-faceted and shape-controlled oxides as supports would...
- Subject:
- Materials Science
- Creator:
- Paull, Ryan
- 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:15035 and etdadmin_upload_729094
-
- 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:
- Throughout history, the development of materials has relied heavily on the empirical judgment of scientists and engineers and on prolonged experiments proton to errors. Due to the complexity of material behavior, successful discovery of new candidates has been serendipitous, and down-selection of candidates remains a time-consuming process that requires repetitive...
- Keyword:
- Oxides, High-throughput, and Electrochemistry
- Subject:
- Materials Science
- Creator:
- HUANG, RUIYUN
- 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:15291 and etdadmin_upload_765065
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