Modeling & Characterization To Develop Tailored-Property Glass Composites
Abstract not provided.
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Jump to search filtersModeling and Characterization of Exemplar Sealing Glasses to Develop Chemistry-Structure-Property Relationships
Abstract not provided.
Characterization & Modeling of Glass Chemistry-Structure-Property Relations To Develop Advanced Glass Composites
Abstract not provided.
Investigation of the Dynamic and Diffusional Properties of Supported Membranes on Bioinspired Materials using HRMAS NMR
Abstract not provided.
Mapping Sodium Jump Dynamic Distributions in NASICON Materials Using High Temperature 23Na NMR Spectroscopy Relaxation Measurements
Abstract not provided.
Solid-State Dynamics and Hydrogen Bonding in Uranyl Clusters using Multi-Nuclear MAS NMR Spectroscopy
Abstract not provided.
Characterization & Modeling of Glass Chemistry-Structure-Property Relations To Develop Advanced Glass Composite Joining Materials
Abstract not provided.
Exploring the role of phosphate structural distortions on the sodium jump dynamics in NASICON phases
Materials Research Society Symposium Proceedings
High temperature solid state sodium (23Na) magic angle spinning (MAS) NMR spin lattice relaxation times (T1) were evaluated for a series of NASICON (Na3Zr2PS12O12) materials to directly determine Na jump rates. Simulations of the Ti temperature variations that incorporated distributions in Na jump activation energies, or distribution of jump rates, improved the agreement with experiment. The 23Na NMR T1 relaxation results revealed that distributions in the Na dynamics were present for all of the NASICON materials investigated here. The 23Na relaxation experiments also showed that small differences in material composition and/or changes in the processing conditions impacted the distributions in the Na dynamics. The extent of the distribution was related to the presence of a disordered or glassy phosphate phase present in these different sol-gel processed materials. The 23Na NMR T1 relaxation experiments are a powerful tool to directly probing Na jump dynamics and provide additional molecular level details that could impact transport phenomena.
Mechanically-Induced Degradation of Metallic Sliding Electrical Contacts in Silicone Fluid at Room Temperature
Abstract not provided.
Degradation of Sliding Electrical Contacts Submerged in Silicone Fluid
Abstract not provided.
Characterization of Free Surface-Bound and Entrapped Water Environments in Poly(N-Isopropyl Acrylamide) Hydrogels via 1H HRMAS PFG NMR Spectroscopy
Journal of Polymer Science. Part B, Polymer Physics
We found that different water environments in poly(N-isopropyl acrylamide) (PNIPAAm) hydrogels are identified and characterized using 1H high resolution magic angle spinning (HRMAS) nuclear magnetic resonance (NMR). Local water environments corresponding to a “free” highly mobile species, along with waters showing restricted dynamics are resolved in these swollen hydro-gels. For photo-initiated polymerized PNIPAAm gels, an additional entrapped water species is observed. Spin–spin R2 relaxation experiments support the argument of reduced mobility in the restricted and entrapped water species. Furthermore, by combining pulse field gradient techniques with HRMAS NMR it is possible to directly measure the self-diffusion rate for these different water environments. The behavior of the heterogeneous water environments through the lower critical solution temperature transition is described.
A Multi-Scale Approach to Sodium-Based Battery Development
Abstract not provided.
Development and Investigation of NMR tools for chiral compound identification
The goal behind the assigned summer project was to investigate the ability of nuclear magnetic resonance spectroscopy (NMR) to identify enantiomers of select chiral organo-fluorophosphates (OFPs) compounds which are analogs of chemical warfare agents (CWAs, e.g. Sarin). This involved investigations utilizing chiral solvating agents (CSAs) and characterizing the binding phenomena with cyclodextrins. The resolution of OFPs enantiomers using NMR would be useful for research into toxicodynamics and toxicokinetics in biological systems due to the widely differing properties of the CWA enantiomers [1]. The optimization of decontamination abilities in the case of a CWA events, with this method’s potential rapidity and robustness, as well as the development of models correlating chiral compounds with CSAs for optimal resolution are all rational benefits of this research.
Heterogeneous Oxidation of PDMS Fluids at Metal Surfaces
Abstract not provided.
Characterization And Modeling Of Glass Chemistry-Structure Relations
Abstract not provided.
Exploring the Use of Pulsed Field Gradient (PFG) NMR to Extract Molecular Weight Distributions of Lignin
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Development and Investigation of NMR Tools for Chiral Compound Identification
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Understanding and Regulation of Microbial Lignolysis for Renewable Platform Chemicals
Abstract not provided.
Lipid Bilayers on Silica Substrates: Measuring Membrane Fluidity and Diffusion
Abstract not provided.
Exploring the Interactions between Carbonate-Based Solvents and Nanoporous Carbon by Measuring Diffusion and Relaxation Properties with Pulsed Field Gradient HR-MAS NMR
Abstract not provided.
Investigation and Development of NMR Tools for Chiral Identification
Abstract not provided.
Exploring the Interactions between Carbonate-Based Solvents and Nanoporous Carbon
Abstract not provided.
Lipid Bilayers on Silica Beads
Abstract not provided.
Lipid Bilayers on Silica Substrates: Measuring Membrane Fluidity and Diffusion
Abstract not provided.
Mechanically-Induced Degradation of Metallic Sliding Electrical Contacts in Silicone Fluid at Room Temperature
Abstract not provided.
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