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Some of the material in is restricted to members of the community. By logging in, you may be able to gain additional access to certain collections or items. If you have questions about access or logging in, please use the form on the Contact Page.
A new numerical method is developed for the solution of the diffusion problem in a system of several materials. In such a system, the diffusion coefficients are piecewise continuous and jumps in their values can occur across the complex...
Polyelectrolytes can be used in a variety of forms from Layer-by-Layer assembled thin films to spun polyelectrolyte complex as free-standing membranes. The Layer-by-Layer methodology is used to adsorb oppositely charged polyelectrolytes...
Oxide ceramics are materials with a wide range of properties. Insulators are most common, however semiconductors, strongly correlated electron materials, and even superconductors are all relevant oxide materials. Here we seek to...
To transfer the incredible properties, including ultrahigh tensile strength, Young's modulus, and electrical conductivity of an individual carbon nanotube (CNT) into composite applications, the constituent nanotubes need to possess...
The spinel vanadate CoV2O4 is a magnetically frustrated system with an interesting non-collinear spin texture at low temperatures. The magnetic frustration in the system arises from the arrangement of atoms in the structure of the...
Nb 3 Sn conductors are important candidates for high-field magnet applications for Future Protonor Muon Colliders, and they continue to be widely used for many laboratory and NMR magnets. However, the critical current density, J c, of...
Materials have significant impact on the advances of technology and development of civilization. For instance, the Stone Age, the Bronze Age, and the Iron Age are three historical periods identified by the materials people used. In more...
Nanoparticles have been extensively studied in the past few decades due to the possibilities they offer in applications ranging from medicine to energy generation. A new class of ultra-small noble metal nanoparticles consisting of tens...
Polyethylenes with functional groups placed at precise locations along the backbone serve as model systems for studying the effect of co-units on crystallization behavior of polymers. Good thermal stability and high crystallinity...
Self-assembled bilayers consisting of a monolayer of molecules, a metal linking ion and a second molecular layer were prepared and used in controlling critical energy and electron transfer events in dye-sensitized solar cells (DSSCs)....
Buckypaper (BP) is a macroscopic aggregate of carbon nanotubes. More specifically, it is an easy-to-handle thin film formed from carbon nanotube networks. Buckypaper contains valuable high mechanical strength, electrical, and thermal...
REBCO coated conductors have recently become viable for high field superconducting magnets, but their use brings new challenges. Knowledge of the transport critical current density over a wide range of magnetic field and temperature, Jc...
This dissertation is a theoretical and computational examination of electronic properties of topological materials, such as topological insulators and Weyl semimetals. Our work is motivated by various experimental observations and...
Polymeric foam materials continue to gather commercial and research interests due to their unique physical characteristics and emerging applications in a wide variety of industries. This research work viewed the polymer foam industry...
Metal flux synthes is a useful alternative method to high temperature solid state synthesis; it allows easy diffusion of reactants at lower temperatures, and presents favorable conditions for crystal growth. A mixed flux of calcium and...
The heavy fermion intermetallic compound URu₂Si₂ continues to attract attention owing mainly to the occurrence of an unknown ordered state at T₀ ~ 17.5 K that is referred to as "hidden order" (HO). HO remains enigmatic, despite more than...
This dissertation details the use of 93Nb (γ = 10.405 MHz/T, I = 9/2) and 77Se (γ = 8.13 MHz/T, I = 1/2) nuclear magnetic resonance (NMR) to investigate the phase transitions of the layered transition metal dichalcogenide (TMD) niobium...
As the only high temperature superconductor with round wire (RW) geometry, Bi2Sr2CaCu2O8+x (Bi-2212) superconducting wire has the advantages of being multi-filamentary, macroscopically isotropic and twistable. With overpressure (OP)...
Progress in nanotechnology is trending towards applications which require the integration of soft (organic or biological) and hard (semiconductor or metallic) materials. Many applications for functional nanomaterials are currently being...
High critical current density (Jc) in MOCVD REBCO coated conductors is accomplished by highly engineered artificial pinning centers (APC) nanostructures that are, however, difficult to control in repetitive long-length production. Adding...
Linear low density polyethylenes (LLDPEs are substantially linear polyethylenes [(C2H4)n] with randomly distributed 1-alkyl short chain branches. The presence of branches on the ethylene backbone sharply reduces the crystallinity level...
Crystalline intermetallic phases grown by metal flux synthesis are discussed in terms of structure-property relationships. Flux growth is employed as the primary synthesis methods across different systems from single element fluxes like...
Metal flux synthesis is a useful technique for the discovery of novel intermetallic phases. The molten state enhances diffusion rates which improves rates of reaction. Reactions can proceed at lower temperatures, allowing for the...
Heterogeneously catalyzed reactions are important in chemical synthesis processes from the standpoint of industrial chemical manufacturing and pollution control, in that they speed up the reaction rates to feasible levels and allow for...
Structural Health Monitoring (SHM) systems have been studied by engineers and researchers for years [1-7], yet the applications of Triboluminescence (TL)-based SHM system for aerospace and civil structures are to a degree unexplored....
Magnetic two-dimensional (2D) materials, proposed to exhibit non-trivial electronic topology, have been discovered recently. In particular, a potential for devices based on van der Waals (vdW) ferromagnetic heterostructures was...
Traditional light emitting diodes (LEDs) involve a complicated device structure with multiple layers stacked over one another. Such a complex, multilayered architecture restricts the application of diverse fabrication techniques. Earth...
Carbon nanotubes (CNT) have shown very attractive mechanical properties, compared to current high-performance carbon fiber reinforcements. Recently, continuous CNT yarns (CNTy) have become commercially available and are becoming a...
Sharks have provided nutrition, raw materials, and symbolism to people globally both near the coast and inland. Shark remains, primarily teeth and vertebral centra, are recovered from archaeological sites around the world and often...
Weight of a material and the system formed by such material is a critical factor for many applications. Traditionally, engineering designed porous structures, typically honeycomb structures, have been utilized for weight critical...
The need for cheaper, stronger permanent magnets is becoming more vital, as clean-energy technologies and commercial electronics rely heavily on Nd₂Fe₁₄B and SmCo₅ for energy conversion. The Nd and Sm metals, however, are expensive rare...
The importance of permanent magnets with rare earth metals has grown as emerging markets increase their demand for technologies made with these magnets. However, the constraints of rare earth suppliers, the environmental impact of the...
Inorganic nanocrystals have garnered significant attention due to their unique physical and optical properties, spurring extensive research into their development for technological applications like electronic devices, solar cells, and...
This dissertation examines the origins of free carrier density in semiconductor nanocrystals and relates these findings to the observed localized surface plasmon resonances (LSPRs). The first chapter introduces some of the most relevant...
The effect of N-methyl Morpholine N-Oxide (NMMO), 1-ethyl-3-methyl-imidazolium acetate ([Emim]Ac) and 1-ethyl-3-methyl-imidazolium diethyl phosphate ([Emim]DEP) on pretreatment and enzymatic hydrolysis of dissolving pulp was studied. X...
The BaLn(sub)2(/sub)O(sub)4(/sub) family has been synthesized successfully as single crystals by the flux-growth method. The phases crystallize in the CaV(sub)2(/sub)O(sub)4(/sub) structure prototype in space group Pnma (# 62). The...
This work describes a simple and general approach to the design of new polyaromatic diradicaloids. The systematic approach starts with privileged core structures with the maximum number of Clar's sextets, and explores the electron...
In this dissertation, we investigate the possibility to use scanning microscopy such as scanning capacitance microscopy (SCM) and scanning spreading resistance microscopy (SSRM) for the "atomistic" dopant profiling of semiconductor...
This doctoral thesis encompasses wide expanses of studies, which aim to advance the understanding of structure-property relationships in fast ion conductors (FICs) with a variety of characterization tools. In particular, powder X-ray...
REBCO coated conductors (CC) have been at the forefront of high-temperature superconductivity (HTS) due to their application in ultra-high-field magnets, but such magnets impose significant mechanical, electromagnetic, and thermal...
This dissertation explores the formation and significance of the screenscape in popular culture. A screenscape encompasses the mixture of screens and bodies that enter into and transform the aesthetic quality of social space. After...
Simulation is valuable since it can provide a link between theory and experiment. Whereas, com- puter modeling is based on theory and is limited to simple models, we can explore many physical properties in a parallel way to experiment....
Doubly-connected superconducting loops are a class of superconducting devices of longstandinginterest in fundamental physics and practical applications. They have been studied since early 1960s and have received intensive recent interest...
This dissertation mainly focuses on the investigation of the magnetic phase diagram of quasi two di- mensional triangular lattice antiferromagnets (TLAFs) Ba₃MNb₂O9 (M = Co2+ (S = 1/2), Mn2+ (S = 5/2)), and their multiferroic properties....
The tunability of a material's structure is highly useful for designing a material with specific properties to meet current and future technological demands. This dissertation investigates the structure-property relationships of mixed...
Colloidal suspensions transform between fluid and disordered solid states when parameters such as the colloid volume fraction and the strength and nature of the colloidal interactions are varied. Seemingly subtle changes in the...
Spin-polarized unrestricted density functional theory is used to calculate the molecular properties of magnetic semiconductor quantum dots doped with 3d-metal atoms. We calculate total energies of the low spin antiferromagnetically...
Understanding Slow Dynamics in Polymers Using Coarse-Grained Molecular Dynamics Simulations: Microphase Separation in Block Copolyelectrolytes and Photo-Switching in Azobenzene-Polymers
Tracking slow dynamics in polymers is very challenging using all-atomistic molecular dynamics simulations due to the vast range of time scales involved. Therefore, there are urgent needs to develop coarse-grained modeling schemes to meet...
The dynamic self-organization of lipids in biological systems is a highly regulated process that enables the compartmentalization of living systems at microscopic and nanoscopic levels. Exploiting the self-organization and innate...
The isothermal and non-isothermal crystallization kinetics of poly (propylene succinate) stereocomplex over a broad range of temperatures has been studied. Crystallization peaks from Differential Scanning Calorimeter are only observed...
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