Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 6 of 6 for “"Anion Diffusion"”.
-
Cation and Anion Transport in a Dicationic Imidazolium-Based Plastic Crystal Ion Conductor
… (PFG) NMR. We quantify distinct cation and anion diffusion coefficients as well as the diffusion activation energies (Ea) in this dicationic imidazolium-based OIPC. Our studies suggest a change in transport mechanism for the cation upon varying thermal and magnetic treatment (9.4 T), …
-
NMR Applications in Soft Materials Science: Correlation of Structure, Dynamics, and Transport
… of ²³Na solid-state NMR, ¹H/²H PFG NMR diffusion, relaxation and grazing-incidence small-angle X-ray scattering. Our results show that the liquid crystalline domains in these materials undergo a transition from columnar to bicontinuous cubic phases with a simple increase in humidity, …
-
A systematic study of radiation enhanced diffusion; theoretical improvement and application
… new rate theory model for the radiation enhanced diffusion (RED) has been developed. To improve the traditional mean-field theory, which assumes all defects are produced uniformly and continuously in the form of Frenkel pairs under irradiation, the new model considers more realistic defect …
-
Transport and Anisotropy inside Ionic Polymer Membranes
… copolymers. For the multi-block copolymers, NMR diffusion measurements yield diffusion anisotropy as a function of water uptake and block lengths. ²H NMR spectroscopy on absorbed D₂O probes membrane alignment modes. These measurements also provide insights into average defect distributions. For …
-
Ion Pairing in Aqueous Metal Sulfates and Platinum Group Metal Ammonium Solutions
… important platinum group metal (PGM) chloro-anion one. Their industrial importance relates to the search for a Green Chemistry Process for the separation of PGM chloro complexes that have been extracted from the mined ore into an acidic aqueous media. This requires a PGM separation process in …
-
Radiation-enhanced diffusion of oxygen-18 in uranium dioxide thin films
Anion radiation enhanced diffusion (RED) and thermal diffusion of a buried 18O tracer layer in thin film UO2 was measured using Secondary-Ion Mass Spectroscopy (SIMS). Thin films were grown using a dedicated magnetron sputtering chamber. Samples were irradiated with 1.8 MeV Kr+ over a temperature …