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Showing 1 to 20 of 143 for “"metal surfaces"”.
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Biofilm formation on metal surfaces
… of biofilms on mild and stainless steel surfaces in pure and mixed batch cultures of the bacterial species Pseudomonas fluorescens and Desulfovibrio desulfuricans and the role of these biofilms in corrosion of steel has been investigated. Early events leading to the formation of biofilms …
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Characterization of Silicotungstate Anion Modified Metal Surfaces
Multilayer-like features were observed on Ag surfaces when the potential was cycled negative of the onset of the first redox couple of alpha-H 4SiW12O40. QCM measurements suggested that negative potentials attracted alpha-SiW12O404- near Ag surfaces. XPS data qualitatively indicated that more …
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The Structure and Composition of Metal Surfaces
… in the study of the structure and composition of metal surfaces, though its surface-sensitivity is known to be lower than that for reflection high energy electron diffraction (RHEED), low energy electron diffraction (LEED) and Auger electron spectroscopy. In the present work evaporated films of …
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Thermal conductance of metal surfaces in contact
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1959.
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The Structure of Solvents Confined to Metal Surfaces
Finally, tetrabutylammonium perchlorate (TBAP) is added to DMSO. Under potential control, positive of the potential of zero charge (PZC), STM reveals the DMSO solvent structure together with the perchlorate anion. The tetrabutylammoniurn cation can not be seen due to the presence of water in the …
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Structure and faceting of low-symmetry metal surfaces
… determining the atomic structure of crystalline surfaces. The dual advantages of high intensity and high resolution have made this technique thrive at synchrotron radiation sources. The experiments in this thesis extend surface x-ray diffraction to metal surfaces with particularly low symmetry: …
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Diffusion of light adsorbates on transition metal surfaces
… diffusive dynamics of adsorbates on close-packed metal surfaces, namely hydrogen on Cu(111), Pd(111) and Ru(0001), carbon and oxygen on Ru(0001), and oxygen on Cu(111). Chapter 2 reviews the HeSE technique and describes the relevant dynamical models and statistical methods used to interpret data …
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LEEDS studies of adsorbate-induced reconstruction of metal surfaces
… atoms chemisorb and induce reconstruction at a metal surface; these surfaces are designated Ni(111)-(2x2)-0,Cu(110)-(2x3)-N, and Pd(100)-(V5x45)R27°-0. In each case, experimental data consist of a set of intensity-versus-energy (I(E)) curves measured at normal incidence with a video LEED …
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Kinetic studies of fuel instability at heated metal surfaces
Includes bibliographical references (pages 115-124).
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Nuclear magnetic resonance studies of simple molecules on metal surfaces
We have used NMR to study the structure and reactions of acetylene and ethylene adsorbed on small catalyst particles. By monitoring $\sp{13}$C-$\sp{13}$C and $\sp{13}$C-$\sp1$H dipolar couplings we found the carbon-carbon bond length to be 1.44 $\pm$ 0.02A for acetylene adsorbed on Rh clusters at …
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An NMR study of diffusion of CO on metal surfaces
… is equivalent to the one of CO on Pd (111) surfaces whereas on small clusters the packing is less dense. The CO diffusion rate in this phase has been measured by the Sshape method. For the high temperature phase CO is much more mobile than for the low temperature phase as is evidenced by …
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A quantum Monte Carlo study of pseudopotentials and metal surfaces
Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T15:01:26Z Item is restricted indefinitely.
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Chemical Softness as a Predictor for Reactivity at Metal Surfaces
… have a reactivity index which can be applied to metal surfaces and adsorbates. The local softness is a reactivity index based on Pearson’s theory of hard and soft acids and bases. It is the derivative of the local electron density with respect to the chemical potential, at constant external …
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Pit initiation on passivated metal surfaces: crystallographic orientation and environmental effects
… potential among five differently oriented surfaces. The critical pitting potential of zinc single crystals decreased with the surface orientation in the following order: (1010) > (1120) > (0001). The critical pitting potentials for zinc and aluminum were found to be lower in chloride …
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Thermal and electron stimulated chemistry of complex adsorbates on metal surfaces
… a thermally activated, switchable hetero-polyoxometalate (HPOM) cluster immobilised on a highly polarisable gold surface which has potential as such a device. This cluster consists of a nanometre sized Mo(IV) oxide “shell” which encapsulates two electronically active pyramidal sulfite (SIVO32-) …
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The role of oxidation in the protection of sliding metal surfaces
… the results of extensive examinations of the surfaces and sub surfaces by various physical methods of analysis. The major part of the thesis, however, is devoted to the development and application of surface models and theoretical quantative expressions in order to explain the observed …
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Boundary Layer Dynamics in Mixed Hydrocarbon Thin Films on Metal Surfaces
Hydrocarbon bilayers on Pt(111) are an ideal model system for studying the dynamics of molecules in organic thin films. These adsorbates form a well-ordered and well-defined molecular assembly. While maintaining a crystalline-like structure, molecules in this assembly are able to diffuse distances …
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An NMR study of diffusion of carbon monoxide on metal surfaces
The author reports the study of diffusion of carbon monoxide on supported palladium and platinum clusters by Nuclear Magnetic Resonance. As part of these studies, a novel NMR technique for studying diffusion (called an S-shape sequence) has been implemented.
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Structural study of electrochemically induced adsorption and diffusion of metal surfaces
… adsorbates physisorbed onto conductive surfaces. The STM is ideal for this because it is capable of obtaining real space images of local electronic and topographic features with atomic resolution. It also has the ability to perform in many different environments, including electrolyte, …
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Adsorption physics of alkali metal vapors on metal surfaces - Cesium-Tungsten.
Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Thesis. 1965. M.S.
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