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We observed stretching and bending vibrations of H on stepped Si(111) surfaces formed in hot water. These observations were explained by a simple surface model which included a monohydride on a terrace, a monohydride chain at the step edge of a (111) micro-facet, and a vertical dihydride at the step edge of a (001) micro-facet. We found that the dynamic polarization associated with the bending vibration...
Evidence of the removal of surface oxides from a partially oxidized Si(111) surface, and the simultaneous termination of the new dangling bonds by hydrogen in hot water, has been obtained. The amount of remaining oxides decreased by lowering the dissolved-oxygen concentration (DOC) from 4 to 0.004 ppm. After immersing in hot water with a DOC of 0.004 ppm for 60 min, almost all of the surface was hydrogen-terminated...
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