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Showing 1 to 20 of 81 for “"thermal desorption"”.
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Thermal desorption of neutral molecules
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1998.
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Angle-Resolved Thermal Desorption Spectroscopy as a Surface Probe
… fifteen years it has become apparent that the desorption process is not as well understood as it appeared when Knudsen formulated his cosine law of desorption in the early 1900's. Directed desorption, where the flux is focused along the surface normal, has been observed in several systems, …
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Thermal Desorption Spectroscopy Measurements of Hydrogen Retention in Flowing Liquid Lithium
Made available in DSpace on 2017-07-06T18:55:42Z (GMT). No. of bitstreams: 3 Olczak_Wieslaw_W_MS.pdf: 1180395 bytes, checksum: 7d82ac8bfb0643dbe1d1b55c59fa21b5 (MD5) Olczak_Wieslaw_W_MS_ABS.pdf: 40741 bytes, checksum: 152e9b0d550225e9814fc7adb7710818 (MD5) license.txt: 4813 bytes, checksum: …
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Tritium thermal desorption testing of nuclear graphites irradiated at fluoride-salt-cooled high-temperature reactor conditions
The Fluoride-Salt-Cooled High-Temperature Reactor (FHR) is a next-generation nuclear plant design that combines successfully demonstrated technologies from other advanced reactor concepts such as tristructural isotropic (TRISO) coated particle fuel, molten flibe salt (LiF-BeF2) coolant, and an …
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Detection and analysis of spin trapped radical adducts using thermal desorption gas chromatography mass spectrometry (TD-GC-MS)
… Solid Phase Microextraction (HS-SPME) or Thermal desorption (TD), andthe extracted products then detected and identified by using gas chromatography-massspectrometry (GC-MS). GC-MS provides an alternative to other traditional techniqueslike EPR spectroscopy, as it provides more detailed …
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UV/ozone induced oxidation of silicon(1-x) germanium(x) alloys and thermal desorption of the oxide film
… of Si$\sb{\rm 1-x}$Ge$\sb{\rm x}$ alloys and thermal desorption of the oxide film. A low temperature technique has been demonstrated for cleaning Ge wafer surfaces for the growth of high quality epitaxial films. Using x-ray photoelectron spectroscopy (XPS) and other techniques, it is shown …
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The adsorption of sulfur and halogen containing materials on nickel studied by X-ray photoelectron spectroscopy and thermal desorption spectroscopy
… an X-ray photoelectron spectrometer (XPS) and a thermal desorption system with mass spectrometric analysis (TD). The ion implantation of the methyl halide series on nickel was investigated by XPS. The nickel surface was cleaned by high temperature heating in vacuum or argon ion sputtering. An …
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New technology for thermal desorption feeding with concentrating solar power (csp) system [Nuove tecnologie per il desorbimento termico alimentato con solare a concentrazione]
… riutilizzato come sistema geotermico "Borehole Thermal Energy Storage" (BTES), evidenziando la doppia applicabilità del modello configurato sia per la bonifica sia per lo stoccaggio geotermico come opzione di riutilizzo del sito. I risultati finali confermano che il DT, se combinato con …
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Surface studies in ultra high vacuum
… attaining pressures of 10-12 mm Hg was used for thermal desorption experiments. The metal chosen for these experiments was tantalum because of its suitability for thermal desorption experiments and because relatively little work has been done using this metal. The gases investigated were carbon …
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Haloethane Reactions over the Chromia Cr₂O₃ (1012) Surface
… α-Cr₂O₃ (1012) surface by means of thermal dissociation. Ethyl iodide is dissociated giving iodine adatoms and ethyl fragments bound to surface Cr cation sites, while ethyl chloride is dissociated giving chlorine adatoms and ethyl fragments. No oxygenated products are observed in …
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Surface decomposition studies of trimethylgallium on silicon(100)
… (TMG) on silicon (100) was investigated using thermal desorption spectroscopy (TDS), x-ray photoelectron spectroscopy (XPS), infrared spectroscopy (IR), and electron energy loss spectroscopy (EELS).
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An electrochemical and surface analytical investigation of iron oxidation, passivation and corrosion inhibition
… (AES), low energy electron diffraction (LEED), thermal desorption mass spectrometry (TDMS) and ion bombardment (depth profiling) was used to investigate iron oxide films formed on iron by gas phase oxygen exposure as well as electrochemical polarization in borate buffer and corrosion inhibitor …
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An investigation of volatile organic compounds in landfill gas
… developed using adsorption tubes with solvent or thermal desorption followed by analysis of VOCs using gas chromatography with mass selective detection (GC/MS).
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The Interaction of Simple Gases with Hot Metal Filaments
… high vacuum system consisted of observing the thermal desorption of neutral species from the surface and the effects of gas adsorption on the electron work function of this surface. The study of the thermal desorption of iodine and methyl iodide revealed the presence of adsorbed molecular …
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Hydrogen in Austenite: What Changes after Martensitic Transformation?
… of austenite and the corresponding hydrogen desorption behaviour were studied using microscopy, diffraction, thermal desorption analysis and microprinting. This work has shown that the change in hydrogen desorption behaviour after compression strongly depends on the dissolved hydrogen …
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Pressure Swing Assisted Desorption for Atmospheric Water Collection
… methods of atmospheric water harvesting focus on thermal desorption, where heat is applied to release the water vapor from the sorbent. Another method worth exploring is utilizing pressure swings to release this water vapor, and seeing how a combined method of thermal and depressurized desorption …
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The interaction of xenon difluoride with Si(100)
… atom diffraction, beam-surface scattering and thermal desorption measurements are the major techniques used to probe the surface-bound products of the reaction. It is found that XeF2 dissociatively chemisorbs with high probability solely on the Si dangling bonds up to a coverage of about one …
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Reaction chemistry of C₁ hydrocarbon fragments and oxygenates on Cr₂O₃ (101̅2)
… Cl-terminated α-Cr₂O₃ surfaces, were studied by thermal desorption spectroscopy. Adsorbed formaldehyde forms dioxymethylene species on the nearly-stoichiometric surface that react primarily above 600 K. Dioxymethylene decomposes via a Cannizzaro-type process with dehydrogenation to formate, and …
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Heterogeneous decomposition of trimethylaluminum and trimethylgallium on silicon surfaces
… for use in MOCVD and MOMBE. This study uses thermal desorption spectroscopy, x-ray photoelectron spectroscopy, and electron energy loss spectroscopy to examine the decomposition of TMAl at low coverages on heated silicon substrates. In addition, molecular beam methods are employed to …
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Commercialization of cryptomelane-type manganese oxide (OMS-2) nanowire paper oil sorbent
… oleophilic while being hydrophobic, and high thermal stability. These properties open up possible markets for commercialization. This thesis reviews the market potential of each of these properties and explores the competitiveness of the nanowire paper in the proposed markets. The proposed …
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