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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.
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...
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...
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)....
Irradiation induced voids and associated swelling is one of the most intriguing and technologically relevant problems in the design of structural materials for nuclear reactor components. Traditional approaches model void nucleation and...
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)...
Adaptive materials are typically known as materials that convert one form of energy into another. Well-known examples include ferroic materials (ferroelectric, ferromagnetic, shape memory alloys), dielectric elastomer, and azobenzene...
Wind-and-react coils using alumino-silicate insulated Bi2Sr2CaCu2Ox (Bi-2212) round wire consistently show reduced transport properties compared to short samples heat treated under identical conditions. To take full advantage of the Bi...
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...
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 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...
Azobenzene liquid crystal polymers have emerged as a new type of adaptive material in recent years. The materials contain photo sensitive azobenzene mesogens that are embedded in the host polymer network which gives rise to unique field...
This dissertation describes the propagation of near atmospheric nitrogen gas that rushes into a liquid helium cooled vacuum tube after the tube suddenly loses vacuum. The loss-of-vacuum scenario resembles accidental venting of...
The narrow band gap semiconductor iron antimonide, FeSb2, has been grown as bulk single crystals, and investigated for its electronic and magnetic properties at low temperatures. The electronic behavior of FeSb2 is associated with strong...
Aiming for high-temperature applications (1200-2000°C), traditional carbon/carbon (C/C) composites are composed of carbon fibers (CFs) and amorphous pyrolytic carbon (PyC) matrix. Although still heterogeneous in the nature, both the...
Nanoscale ion diffusion is an important phenomenon governing the energy conversion efficiency, stability, degradation pathway, and lifetime of both soft and condensed engineering materials. Block copolyelectrolytes are one of the leading...
The effects of pico-second pulsed laser ablation on the crystal structure and residual strain of sapphire is investigated using X-ray diffraction and Bayesian uncertainty analysis. Laser machining of sapphire has shown to be a viable...
REBa2Cu3O7-&delta (REBCO, RE = rare earth) coated conductor (CC) holds great promise for high field magnet applications owing to its strong irreversibility field (Hirr), low electromagnetic anisotropy (&gamma2), and high critical current...
Although 2011 marks the 50th anniversary of Nb3Sn as the first high field superconductor and Nb3Sn is the presently most widely used high field superconductor, there is no detailed quantitative understanding of how its properties, ...
This research demonstrates the techniques to potentially use continuous carbon nanotube (CNT) yarns to make high mechanical performance composites at scale for use in aerospace applications. CNT yarns are a way to convert carbon...
Sapphire is presently being utilized in optical based pressure traducers for use in measuring pressure at high temperatures. The robustness of sapphire makes it an ideal material for use as a high temperature sensor; however, not without...
REBCO (REBa2Cu3O7-δ, RE=rare earth elements) coated conductor (CC) is one of the best candidates for building high-field magnets and it has been improved greatly in recent years. CC overcome the grain boundary problem by using either a...
My research has been focusing on the development and processing of metal halide perovskites, an emerging class of semiconductor materials, for various types of light emitting diodes (LEDs). In this dissertation, introduction to metal...
Metal halide perovskites have received significant attention in the past decade as a promising class of material for energy harvesting, light emission and detection as well as various other solid-state devices. The easy solution...
An apparatus to measure the drag on an oscillating 3 mm niobium sphere in superfluid helium has been built and tested. A Nb-Ti superconducting solenoid is used to suspend the niobium sphere; meanwhile a similar superconducting quadruple...
There are many safety concerns with cryogenic systems around the world such as particle accelerators. One large concern is the sudden loss of vacuum within the particle accelerator systems. Loss of vacuum can lead to catastrophic...
There are numerous needs for sensing, one of which is in pressure sensing for high temperature application such as combustion related process and embedded in aircraft wings for reusable space vehicles. Currently, silicon based MEMS...
All-solid-state batteries (ASSBs) represent a promising advancement in electrochemical energy storage, with solid electrolytes (SEs) playing a crucial role. Sulfide and halide SEs have garnered substantial interest due to their distinct...
Bi2Sr2CaCu2O8+x (Bi-2212) is a promising candidate for ultra-high field magnets (>25 T) because of its round wire geometry, twisted multifilamentary architecture, and macroscopically isotropic electromagnetic properties. However, in...
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