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 11 of 11 for “"cluster ion"”.
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Chemical effects in cluster SIMS depth profiling of polymer-based materials
… of which has become relevant with the introduction, in secondary ion mass spectrometry, of cluster ion sources. While the introduction of cluster-SIMS represented a real breakthrough in the possibility of obtaining molecular information along the depth of polymer materials, however it turned out …
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Infrared spectroscopy of ion-hydrocarbon clusters
Many biological and environmental systems contain ion, water, and hydrophobic components; and it is the balance between these competing interactions which governs their chemistry. This Thesis aims at exploring ion•••hydrocarbon interactions, then ion•••water•••alkane interactions. To accomplish …
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The mass of 22^Mg and a concept for a novel laser ion source trap
Clean and high-quality radioactive ion beams can be prepared by combining ion trap and resonance laser ionization techniques. A feasibility study for such a laser ion source trap has been carried out which shows enormous improvement in the beam emittance, purity, and in addition allows for a …
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Ionic conductivity transitions in antiperovskite ionic conductors
… cycling efficiency. However, the relatively low ionic conductivity of most solid state electrolytes has been considered as the major challenge. Antiperovskite(AP) electrolytes are recently developed solid state electrolyte with enhanced ionic conductivity. AP materials also provide an ideal …
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Infrared spectroscopy of cluster ions: High energy conformer trapping and multiple photon absorption
Infrared predissociation (IRPD) spectra of several cluster ions are presented, resulting in the emergence of two major themes. Trapped, high energy conformers are observed in argon tagged clusters. In non-argon tagged hydrated alkali metal ion clusters, multiple photon absorption processes can …
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Biomedical applications of nanostructured polymer films
Functional polymeric thin films are often stratified with nanometer level structure and distinct purposes for each layer. These nanostructured polymeric materials are useful in a wide variety of applications including drug delivery, tissue engineering, controlling condensation and polymeric …
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Mass spectrometry imaging for probing molecular distributions in the nervous system
… a highly intertwined and complex set of interactions in which molecules vary spatially and temporally in addition to being present in concentrations that extend over many orders of magnitude. These chemical entities belong to numerous classes including inorganic salts, metabolites, lipids, …
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Effects of implementation of decaborane ions in silicon
The next generations of Si microelectronic devices will require ultra shallow p-type junctions formed by implantation of B ions with energies below 1 keV, at which available beam currents are severely limited by space charge effects. To solve this problem, decaborane (B_{10}H_{14}) cluster ion …
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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 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$\sb2$, …
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Drift Tube Ion Mobility Measurements for Thermochemistry, Kinetics and Polymerization of Cluster Ions
In this work, the Drift Tube Ion Mobility technique is used to study the hydrophobic hydration and solvation of organic ions and measure the thermochemistry and kinetics of ion-molecule reactions. Furthermore, an exploratory study of the intracluster polymerization of isoprene will be presented and …