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 20 of 38 for “"Surface studies"”.
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Surface studies in ultra high vacuum
… values obtained related to the reaction on the surface. The thermal desorption reaction was not capable of supplying all the information necessary to form a complete picture of the desorption reaction. Further information was obtained by using a quadrupole mass spectrometer to analyse the …
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Surface studies using spin-polarized ion neutralization spectroscopy
… He+ ions is directed onto a surface and analysis is done of the electrons ejected from the surface as a result of ion neutralization, is a unique tool for surface studies that has unparalleled surface specificity. Using SPINS, we have discovered that the polarization of …
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Surface Studies in Ultrahigh Vacuum by Radiotracer Techniques
Made available in DSpace on 2015-05-12T17:12:22Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6101614.PDF: 2567226 bytes, checksum: 4e0acb26576b35847fc12380740caa9b (MD5) Previous issue date: 1961
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Surface studies of group IV-VI layered crystals
The surface structure of TiS2 has been investigated by low energy electron diffraction (LEED). No surface reconstruction was observed and comparison of LEED intensity data with theory suggests a slight outward relaxation of atomic planes at the surface. The LEED pattern for a crystal cleaved at a …
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In Situ Surface Studies of III-V Semiconductor Compounds
… “quenched” in an attempt to preserve the growing surface, before imaging can commence. This technique suffers dually from the unknown effects of the quenching procedure and the limiting ability to only capture frozen-in-time images of the surface. The ultimate evolution of STM would be to allow …
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Surface studies of Li-ion and Mg battery electrodes
This dissertation focuses on studies of the surfaces of both Li-ion and Mg-ion battery electrodes. A fundamental understanding of processes occurring at the electrode surface is vital to the development of advanced battery systems. Additionally, modifications to the electrode surfaces are made and …
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The Mössbauer effect in surface studies Fe57 on Ag
The Mossbauer effect for atoms located at crystal surfaces is discussed. We show that the Einstein model is valid for describing qualitatively the mean square displacement of lattice atoms. The mean square displacement (Mossbauer recoilless fraction) and mean square velocity (MOssbauer second-order …
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The Moessbauer Effect in Surface Studies, Iron-57 on Silver
Made available in DSpace on 2015-05-12T21:41:35Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6612337.PDF: 2703442 bytes, checksum: 97125821ba4f3e3629727e215a158094 (MD5) Previous issue date: 1966
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In-situ spectroelectrochemical surface studies of fundamental fuel cell catalysis
… sulfuric acid anions with SFG spectroscopy. Surface-adsorbed intermediates such as CO on Pt atop sites and acetate are observed in both H2SO4 and HClO4, but only H2SO4 shows evidence of adsorbed (bi)sulfate species or adsorption of CO to bridge sites. Studies performed with …
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Experimental yield surface studies for the compaction of metal powder
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1993.
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Catalytic hydrodemetallation of nickel porphyrins : reactivity and catalyst surface studies
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1984.
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Low-energy electron diffraction surface studies of II-VI semiconductor compounds.
Massachusetts Institute of Technology. Dept. of Chemistry. Thesis. 1968. Ph.D.
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Surface studies of organic thin films using scanning probe microscopy and nanofabrication
… provide useful model structures for nanoscale studies of the role of chemical structure for electronic properties. Porphyrins have been proposed as viable materials for molecular-based information-storage devices, gas sensors, photovoltaic cells, organic light-emitting diodes and molecular …
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The application of low dose SIMS to surface studies on compound semiconductors
… secondary ion mass spectrometry is assessed as a surface analysis technique for compound semiconductor surfaces. Two types of surface analysis problems are addressed - the use of SIMS to monitor cleaning of GaAs substrates in UHV for MBE growth and adsorption studies - and the use of SIMS in …
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Dynamic Measurements with Scanning Probe Microscopy: Surface Studies Using Nanostructured Test Platforms of Metalloporphyrins, Nanoparticles and Amyloid Fibrils
… be free to vibrate, yet remain attached to the surface. Particle lithography was used to prepare well-defined test platforms of ring structures of magnetic or superparamagnetic nanomaterials. Capillary filling of polydimethylsiloxane (PDMS) molds was applied to generate stripes of FeNi3 …
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Electronically modulated materials : effects and context
… of technologies have led to the design of surfaces and materials that can encode physical properties into digital information that can be manipulated at will. While research at the nano and micro scales continues to develop new materials, the availability and improvements of …
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Biotribology: articular cartilage friction, wear, and lubrication
… displacement; photomacrographs; ESEM and SEM surface studies; stained cross-sectional slides of cartilage; and hydroxyproline analysis of cartilage wear. Detailed procedures and discussion of results are presented along with recommended changes for future biotribology research.
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Tribopolymerization: ceramic lubrication under high loads and high speeds
… wear; in some cases wear increased. ESEM surface studies show a relationship between the anti-wear effectiveness and the consistency of a formed wear debris layer on the alumina surface. The surface films of wear debris and the formed polymeric products may reduce wear by providing …
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