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Showing 1 to 20 of 49 for “"ion-induced"”.
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Low-Energy Ion-Induced Angularly-Resolved Sputtering Measurements
The phenomenon of ion-induced sputtering is integral to many applications. In magnetically confined fusion this sputtering is important for both the lifetime of plasma facing components as well as contamination of the plasma. In plasma processing the sputtering process is involved in etching …
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Rotating magnetohydrodynamic and trapped hot-ion induced internal kinks
As a new and significant contribution to the tokamak literature, the linear internal MHD kink modes in finite aspect-ratio axisymmetric toroidally rotating tokamak equilibria and their kinetic modifications owing to the presence of hot ions are computationally studied herein using a bilinear form …
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Low-Energy Ion-Induced Electron Emission From Gas-Covered Surfaces
Made available in DSpace on 2017-07-06T18:58:52Z (GMT). No. of bitstreams: 3 Smith_Preston_C_MS.pdf: 61120463 bytes, checksum: df566e04c668e5a6496ab1f6313f7f18 (MD5) Smith_Preston_C_MS_ABS.pdf: 518259 bytes, checksum: 671c65d1b7ed866c15d648a53791c24b (MD5) license.txt: 4813 bytes, checksum: …
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Surface kinetic study of ion induced chemical vapor deposition of copper
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1996.
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Ion-induced stress relaxation during the growth of cubic boron nitride thin films
… sputtering under simultaneous stress relaxation by ion implantation. An in situ instrument based on laser deflectometry on cantilever structures and in situ ellipsometry, was used for in situ stress measurements. The characteristic evolution of the instantaneous stress during the layered …
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Novel analytical method for investigating compositional driven ion-induced nanopatterning of multicomponent materials
Ion-induced nanopatterning of GaSb produces hexagonally ordered nanopatterns with cone-shaped nanofeatures, where experimental investigations have shown that these nanopatterns form under a wide variety of ion parameters – including ion energy and ion species. Several theoretical works have …
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Ion-induced charge emission from surfaces bombarded by an [Emim][BF4] electrospray plume
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-01-12 without embargo terms
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Nano-cellular microstructure evolution in ion-induced chemical vapor deposition (II-CVD) of copper
A systematic investigation of the microstructure produced in ion-induced chemical vapor deposition (11-CVD) of copper from copper(I)hexafluoroacetylacetonatevinyltrimethylsilane (Cu(I)hfacVTMS) gas precursor is reported. II-CVD involves the ion-driven decomposition of Cu(l)hfacVTMS and subsequent …
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Computer Simulation of Ion-Induced Nucleation in the Presence of Single Ions and Ion Pairs
… their importance, the mechanisms of their formation are still poorly understood. Ion-induced nucleation may play a role in the process, but details are lacking about how the nucleation rate depends on the size, charge, and number of ions in the cluster. In order to better understand the role that …
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A systematic study of ion-induced nanopatterning on photonic crystal-based label-free optical biosensor
… dielectric material with diffraction gratings engineered on the surface that can control light propagation through its depth. PC enables resonance of a certain wavelength of light, leading to a significant increase in the intensity of light reflected off the surface, and hence the …
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Large-scale molecular dynamics investigations of ion-induced compositional dynamics leading to nanopattern formation at semiconductor surfaces
Ion beam nanopatterning has been demonstrated to be a versatile method for obtaining a wide variety of surface features on a broad range of materials, with structures such as ripples, quantum dots, terraces, and ordered holes being obtained for various experimental conditions. However, theoretical …
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A hybrid model of ion-induced syrface modification with prompt molecular dynamics and lattice-free kinetic Monte Carlo diffusion
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-04-06 without embargo terms
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Development and evaluation of an ion induced x-ray emission system for the analysis of light and medium weight elements
… work describes the development of a proton induced X-ray emission (PIXE) analysis system, especially designed and builtfor routine quantitative multi-elemental analysis of a large number of samples. The historical and general developments of the analytical technique and the physical …
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Deciphering the role of surface composition and topography in self-organized ion-induced nanopatterning of multicomponent semiconductors with in-situ and in-operando metrology
This dissertation has investigated the early stages of both topographical and compositional evolution of ion-induced nanopatterning on GaSb utilizing in-operando Grazing-Incidence Small-Angle X-ray Scattering (GISAXS), X-ray Photoelectron Spectroscopy (XPS), and Low Energy Ion Scattering …
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Observation by flow 1H NMR and dimerization kinetics and products of reactive ortho-quinodimethanes and benzocyclobutadiene
… (CD[subscript]3CN) by fluoride ion induced 1,4-elimination from (1-(trimethylsilylmethyl)) trimethyl(2-naphthylmethyl)ammonium iodide (10), was obtained in the absence of precursor and dimers. However, the [superscript]1H NMR spectrum of the more reactive 1, generated in a …
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Ion Implantation Damage in Solids
Ion induced surface smoothing and roughening processes were studied using Molecular Dynamics (MD) computer simulation. The simulations on self-ion bombarded W showed the effect of the surface on defect production and the roughening of the surface. The simulations on the CuTi, Ag and Ni with …
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Surface kinetics modeling of silicon oxide etching in fluorocarbon plasmas
… etching is a complicated system involving many ion and neutral species. Depending on the plasma condition, many difficulties arise such as RIE lag, etch stop, and low selectivity to photoresist. For a better understanding of the process it is necessary to have an appropriate physical model to …
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Sequence Dependence of the Folding of Kink-Turns in RNA
… the folded and the unfolded state in free solution. The population of the folded kink-turn species can be increased by the addition of metal ions which bind to and stabilise the kink-turn structure. Standard kink-turn RNAs differ in their ability to undergo metal-ion induced folding. For …
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NEW MULTIMETALLIC ASSEMBLIES AS PHOTOLUMINESCENT MATERIALS
… are held together by non-covalent interactions. In particular, the formation of macromolecular assemblies by employing a metal-ion induced selfassembly process in solution is of significant interest. These supramolecular metallo-polymers combine common features of traditional …
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Dewetting and Stress Evolution in Thin Films During Ion Irradiation
This project studies the morphology evolution of non-wetting metal films on a substrate during ion irradiation. It reveals that the mobility of the solid atoms is significantly improved during irradiation and the non-wetting films can dewet as if they are melted. The ion induced dewetting process …
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