An electron-stimulated desorption study of the interaction of hydrogen, deuterium and oxygen with GaAs(100)

Corallo, Cheryl F.; Asbury, Douglas A.; Pipkin, Mark A.; Anderson, Timothy J.; Hoflund, Gar B.

doi:10.1016/0040-6090(86)90059-3

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1988

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Cited by 8 publications

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An engery‐resolved electron stimulated desorption (ESD) study of oxygen‐exposed Ag (110)

Corallo

Hoflund

Outlaw

1988

Surface & Interface Analysis

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Energy-resolved ESD data obtained from Ag(ll0) after exposure to oxygen at room temperature are presented. The oxygen is found to desorb predominantly as a hydroxyl species. The surface hydrogen apparently originates from the bulk silver and is only removed slowly over many sample anneals. OH+ desorbs with an energy of 4.7 eV, and H + desorbs with an energy of 3.0 eV. The results suggest that oxygen adsorbs at two or more different bonding sites on this surface. OH+ desorbs by ESD from the most prevalent of these sites, and 0' desorbs from another site which seems to fill first upon oxygen exposure. The primary beam energy is an important ESD variable since exciting the Ag 3d core levels results in a substantial reduction in the OH+ desorption yield.

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