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.
Results
Showing 1 to 14 of 14 for “"auger spectroscopy"”.
-
Diffusion and Evaporation of Nitrogen on Tungsten (100)
… (100) plane of tungsten has been examined using Auger spectroscopy. The initial localized deposit required for diffusion measurements in a concentration gradient is created by a highly collimated molecular beam. The sample, under computer control, is moved across an electron beam, and the Auger …
-
Structure Sensitivity of Ethylene Adsorption on Platinum (Dehydrogenation)
… Desorption (TPD), Electron Energy Loss Spectroscopy (EELS), Low-Energy Electron Diffraction (LEED) and Auger spectroscopy are applied to study the adsorption of ethylene on the square (1 x 1)Pt(100) and on the pseudo-hexagonal (5 x 20)Pt(100). A model based on the conservation of orbital …
-
Effects of Surface Oxidation on Vacancy Defects in Beta Nickel-Aluminum Alloys
Transmission Electron Microscopy and Auger Electron Spectroscopy has been used to make observations of the oxidation process in (beta)-NiAl alloys annealed under controlled conditions of temperature and oxygen partial pressure. Binary Ni-Al alloys, with nominally 47.5, 50.4 and 52.5 at .% Al, were …
-
Effects of Thickness, Morphology and Molecular Structure of Donor and Acceptor Layers in Thermally Interdiffused Polymer Photovoltaics
… (EQE) as compared with bilayer devices. Auger spectroscopy, combined with argon-ion beam milling, serves to record the concentration depth profile and identify concentration gradients in the device through detection of the sulfur in the P3OT backbone. Concentration gradients are optimized …
-
Polymer/Fullerene Photovoltaic Devices - Nanoscale Control of the Interface by Thermally-controlled Interdiffusion
… with transmission electron microscopy and with Auger spectroscopy combined with ion beam milling to create a depth profile of the polymer concentration in the film. Initial studies to induce an interdiffusion were done on poly(2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylenevinylene) (MEH-PPV) as …
-
Effect of oxygen potential on high temperature crack growth in alloy 617
… ahead of crack tips was performed using Auger spectroscopy.
-
Effect of pattern and coating properties on defect formation in aluminum lost foam castings
… <p>Defect characterization was done using Auger spectroscopy, scanning electron microscopy (SEM), and optical metallography. Auger results revealed that the color of the defect changed with carbon layer thickness. SEM imaging showed the presence of wrinkles on fold surfaces while no …
-
Investigation of electrophoretic deposition as a fabrication technique for high performance composites
… (SEM) and energetic dispersive x-ray (EDX)/Auger spectrometers to visualize coating quality and penetration of the material into the substrate. Limitations of EDX/Auger spectroscopy are briefly discussed with respect to the analysis of boron carbide. After the first set of experiments using …
-
Surface and interface studies of compound semiconductors
… such as electron and x-ray diffraction, Auger spectroscopy, synchrotron photoemission, and scanning tunneling microscopy. Some of the surface and interfacial properties this thesis is concerned with include clean and adsorbate-induced reconstructions, valence-band discontinuities and …
-
A tale of two studies: Syntheses of silicon nitride chemical vapor deposition precursors and divalent lanthanide N,N-dimethylaminodiboranate complexes
… characterization of these films, performed by Auger spectroscopy, show that these films contain Si (~10 %) and N (~10 %) in a 1:1 ratio but have high C (~40 %) and O (~40 %) contents, which is likely attributed to the presence of residual moisture and oxygen in the reaction chamber and the slow …
-
Dual Spin-Cast Thermally Interdiffused Polymeric Photovoltaic Devices
… and temperature of the interdiffusion process. Auger spectroscopy and X-ray photoelectron spectroscopy along with ion beam milling are used to investigate the concentration gradient formed as a result of the interdiffusion. The sulfur signal present in the P3OT and P3HT backbone is detected to …
-
Studies on Ageing and Reanimation of Drift Tubes for the ATLAS Muon Spectrometer
The drift tubes of the ATLAS muon spectrometer are expected to accumulate charges of <br>up to 0.6 C/cm wire during ten years of operation. Five drift gases were developed for <br>the drift tubes and tested in various ageing setups. The influence of the drift gas on <br>the ageing performance was …
-
Non-metallic nanostructures for light-driven chemistry and catalysis
… S in CuS nanocrystals using X-ray photoelectron spectroscopy (XPS) and Auger spectroscopy. We found both Cu⁺ and Cu²⁺ in near equal proportions. A copper-vacancy-rich structure based on this composition is consistent with the free hole concentration estimated from the LSPR frequency. In essence, …