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- W2038449816 abstract "The hydrogen desorption kinetics were investigated from the viewpoint of hydrogen-unoccupied site distributed on Si 2 H 6 -adsorbed Si(100) surfaces during isothermal annealing. The surface electronic state due to Si dimer dangling bonds was observed in situ by ultraviolet photoelectron spectroscopy. The hydrogen desorption was found to be a first-order reaction with an small activation energy of 21.9 kcal/mol, in comparison to the value obtained by thermal desorption spectroscopy (TDS), 47–58 kcal/mol. To interpret this discrepancy, we proposed a desorption reaction model, in which H 2 formation from a paired monohydride on a dimer, which proceeds dominantly during isothermal disorption, is disturbed by dimer Si-Si bond breaking due to rapid temperature elevating in TDS, and therefore an additional energy for hydrogen to hop between resultant isolated monohydrides and form dihydride, 34.5±4.6 kcal/mol, is necessary in TDS for H 2 desorption." @default.
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- W2038449816 date "1994-03-01" @default.
- W2038449816 modified "2023-10-07" @default.
- W2038449816 title "Hydrogen desorption rate and surface hydrogen coverage during isothermal annealing for Si2H6-adsorbed Si(100) surfaces" @default.
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- W2038449816 doi "https://doi.org/10.1016/0022-0248(94)90437-5" @default.
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