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Low-energy electron diffraction effects at complex interfacesOh, Doogie. January 2009 (has links)
Thesis (M. S.)--Chemistry and Biochemistry, Georgia Institute of Technology, 2009. / Committee Chair: Thomas Orlando; Committee Member: Joseph Perry; Committee Member: Nicholas Hud; Committee Member: Phillip First; Committee Member: Rigoberto Hernandez.
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Thermal vibrations and surface dipole moments for LEED from alkali adsorbate systemsMoyses, Matthew January 1995 (has links)
No description available.
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Surface structure determination by Patterson inversion of multi-incidence leed IV-curves /Ma, King-man, Simon. January 2001 (has links)
Thesis (M. Phil.)--University of Hong Kong, 2002. / Includes bibliographical references (leaves 57-58).
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A structural analysis of H₂O on Cu{110} using a novel low flux Fibre-Optic LEED apparatusStockford, Chloe Anne January 2011 (has links)
No description available.
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Diffraction and direct methods for surface structure determination朱翠屛, Chu, Tsui-ping. January 1997 (has links)
published_or_final_version / Physics / Master / Master of Philosophy
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LEED crystallographic determination of the surface structure designated as Rh (100)-c(2x2)-S.January 1990 (has links)
by Chu Hon Yue. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1990. / Bibliography: leaves 91-93. / ACKNOWLEDGEMENT --- p.i / ABSTRACT --- p.ii / Chapter I. --- INTRODUCTION --- p.1 / Chapter II. --- LOW ENERGY ELECTRON DIFFRACTION --- p.4 / Chapter 2.1. --- LEED EXPERIMENT --- p.4 / Chapter 2.2. --- LEED CRYSTALLOGRAPHY:I(E) CURVE --- p.7 / Chapter 2.3. --- AN OUTLINE OF THE PHYSICS OF LEED --- p.8 / Chapter 2.3.1. --- LEED Process In One-Dimensional Surface --- p.8 / Chapter 2.3.2. --- LEED Process In Three-Dimensional Surface --- p.11 / Chapter 2.3.3. --- Surface With An Overlayer --- p.12 / Chapter 2.3.4. --- The Muffin-Tin Model And The Inner Potential --- p.13 / Chapter 2.3.5. --- The Phase Shift --- p.17 / Chapter 2.3.6. --- Thermal Effects --- p.19 / Chapter III. --- DYNAMICAL LEED CALCULATION: THE RENORMALIZED FORWARD SCATTERING PERTURBATION METHOD --- p.22 / Chapter IV. --- THE ZANAZZI-JONA RELIABILITY FACTOR --- p.30 / Chapter V. --- CALCULATIONS AND RESULTS --- p.33 / Chapter 5.1. --- EXPERIMENTAL I(E) CURVES --- p.33 / Chapter 5.2. --- CALCULATED I(E) CURVES --- p.36 / Chapter 5.2.1. --- Top Site --- p.4o / Chapter 5.2.2. --- Bridge Site --- p.41 / Chapter 5.2.3. --- Hollow Site --- p.42 / Chapter VI. --- DISCUSSIONS AND CONCLUSIONS --- p.44 / APPENDIX I --- p.51 / TABLES --- p.52 / I(E) CURVES AND CONTOUR MAPS --- p.61 / APPENDIX II --- p.79 / MAIN PROGRAMME FOR Rh(100)-c(2x2) -S --- p.80 / INPUT PARAMETERS FOR TOP SITE --- p.85 / INPUT PARAMETERS FOR BRIDGE SITE --- p.87 / INPUT PARAMETERS FOR HOLLOW SITE --- p.89 / REFERENCES --- p.91
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Mass transport during step motion on the Si(111) (1x1) surface studied by low energy electron microscopy /Pang, Angbo. January 2009 (has links)
Includes bibliographical references (p. 118-122).
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Atomic structure studies of zinc oxide (0001) polar surface by low energy electron diffraction at multiple incident anglesYang, Yang, 楊暘 January 2012 (has links)
Zinc oxide surfaces have been of considerable interest because of their favorable properties, such as high electron mobility, good transparency, large electronic breakdown field and wide bandgap. Knowing the surface structure of ZnO is the key to better understand the above phenomena and to further develop its applications.
In this thesis, the Patterson Function was evaluated by inversion of LEED I-V spectra at multiple incident angles to determine the surface structure of the ZnO(0001) polar surface. The sample was prepared by degassing and then 15 cycles of argon sputtering and annealing. The experimental LEED I-V spectra from multiple incident angles were taken from the sample. After processing the data by a macro program in OPTIMAS and a Matlab program, a clean Patterson Function map showing the inter-atomic pair distances was obtained. It was then compared with the simulated Patterson Function map of the proposed 1×1 bare surface model. As a result, the spots positions in the simulated Patterson Function map matched well with that of the experimental Patterson Function map.
On the other hand, the LEED I-V curve fitting work was done by the surface science group of City University of Hong Kong. Six models were proposed by them and normal incidence theoretical LEED I-V spectra were calculated to fit with the experimental LEED I-V curves provided by us. Among the six models 2×2 Zn point defect model was fitted to be the best model with the R-factor 0.244. We also compared the multiple scattering simulated Patterson Function map of 2×2 Zn point defect model with the experimental one to verify the validity of the model. As a result, the model fit the experimental data. So we conclude that in general 1×1 model support the order part, and 2×2 top layer Zn defect model best fits the random missing part. / published_or_final_version / Physics / Master / Master of Philosophy
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Low energy electron diffraction from SI(111)7X7 and ultrathin films onsubstrate crystalsLai, Wai-kong, Pan., 黎偉江. January 1999 (has links)
published_or_final_version / Physics / Master / Master of Philosophy
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Surface structure determination by Patterson inversion of multi-incidence LEED IV-curvesMa, King-man, Simon., 馬勁民. January 2001 (has links)
published_or_final_version / Physics / Master / Master of Philosophy
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