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.
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Showing 1 to 6 of 6 for “"Ionic Clusters"”.
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Elucidating the structures of ionic clusters, from ion-water complexes to ion-biomolecule-water complexes
"The competition and cooperation between various noncovalent interactions in hydrated ions and hydrated ion-biomolecule systems are systematically characterized and examined using infrared spectroscopy and various theoretical approaches. The Multiple Channel InfraRed PhotoDissociation spectroscopy …
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The Effects of Structure, Humidity and Aging on the Mechanical Properties of Polymeric Ionomers for Fuel Cell Applications
… controlled by the formation and growth of the ionic clusters that were the direct result of the ionic nature of these materials. In the process of this study, the properties of Nafion® and sulfonated Dais® polymers were investigated by dynamic mechanical analysis and thermal gravimetric …
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An Investigation into the Use of Density Functional Theory (DFT) Calculations for Predicting Vibrational Transitions for Perfluroinated Sulfonic Acid (PFSA) Ionomer Membranes
… stretch could be used to track changes in the ionic clusters formed within the membrane while the ether stretch will provide insight into the largely semi-crystalline PTFE phase. Alterations in either regime will affect both ion transport and mechanical properties and produce a major shift in …
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Computer Simulation of Ion-Induced Nucleation in the Presence of Single Ions and Ion Pairs
… for small differences between two different ionic clusters to persist over a wide range of cluster sizes, adding up to significant differences in the barrier height even when the minima are at similar sizes. We have also found that ion pairs are not as effective at enhancing nucleation as …
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Synthesis and Characterization of Multicomponent Polyesters via Step-growth Polymerization
… that the incorporation of a low level of ionic groups into PETs dramatically improves the mechanical performance and compatibility with other substrates. However, polymers containing ionic groups always exhibit complicated behavior due to the presence of ionic aggregates in the organic …
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The investigation of solvent shell structure and reactivity in solvated metal ion clusters
The structure and reactivity of gas phase ionic clusters were studied using molecular beam mass-spectrometry, vibrational predissociation spectroscopy and Monte Carlo simulation. Cluster ions of the form M$\sp+$(S)$\sb{\rm N}$, M = Cs, Na and S = CH$\sb3$OH, NH$\sb3$, CH$\sb3$NH$\sb2$, …