Desorption kinetics of hydrogen from the Si(111)7×7 surface
- 1 March 1991
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 94 (5), 4080-4083
- https://doi.org/10.1063/1.460660
Abstract
Thermal desorption of hydrogen from the Si(111)7×7 surface was investigated using optical second‐harmonic generation to monitor the hydrogen coverage from 0.2 monolayer to below 0.01 monolayer. The results of isothermal desorption measurements are found to be compatible neither with simple first nor second‐order kinetic behavior. It is suggested that different binding sites available for Si–H monohydride states on the Si(111)7×7 surface give rise to the apparent intermediate reaction order.Keywords
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