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The Oxygen Coverage on Diamond Surfaces

Derry, T. E. / Harris, P. E. / Sellschop, J. P. F. / Copperthwaite, R. G. / Hansen, J. O.

Abstract Polished diamond surfaces have previously been shown to have hydrogen atoms terminating the “dangling bonds”, but we have found that surfaces prepared by polishing or cleaning in aqueous media show a fractional monolayer coverage of oxygen atoms when examined by XPS or RBS. Since oxygen is divalent, it may well be present in the form of hydroxyl groups (on (100) surfaces, ether bridges are possible). The large van der Waals radii of the oxygen atoms should prevent their accommodation on adjacent sites, and limit coverage on (111), (110) and (100) surfaces to one-third, one-third, and one-half monolayers respectively; the mean values determined by RBS are 0.30 ± 0.03, 0.31 ± 0.05, and 0.51 ± 0.04 respectively. These numbers are consistent with the XPS results.

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The Oxygen Coverage on Diamond Surfaces

Derry, T. E. / Harris, P. E. / Sellschop, J. P. F. / Copperthwaite, R. G. / Hansen, J. O.

Abstract Polished diamond surfaces have previously been shown to have hydrogen atoms terminating the “dangling bonds”, but we have found that surfaces prepared by polishing or cleaning in aqueous media show a fractional monolayer coverage of oxygen atoms when examined by XPS or RBS. Since oxygen is divalent, it may well be present in the form of hydroxyl groups (on (100) surfaces, ether bridges are possible). The large van der Waals radii of the oxygen atoms should prevent their accommodation on adjacent sites, and limit coverage on (111), (110) and (100) surfaces to one-third, one-third, and one-half monolayers respectively; the mean values determined by RBS are 0.30 ± 0.03, 0.31 ± 0.05, and 0.51 ± 0.04 respectively. These numbers are consistent with the XPS results.

The Oxygen Coverage on Diamond Surfaces

Derry, T. E. / Harris, P. E. / Sellschop, J. P. F. / Copperthwaite, R. G. / Hansen, J. O.

Abstract Polished diamond surfaces have previously been shown to have hydrogen atoms terminating the “dangling bonds”, but we have found that surfaces prepared by polishing or cleaning in aqueous media show a fractional monolayer coverage of oxygen atoms when examined by XPS or RBS. Since oxygen is divalent, it may well be present in the form of hydroxyl groups (on (100) surfaces, ether bridges are possible). The large van der Waals radii of the oxygen atoms should prevent their accommodation on adjacent sites, and limit coverage on (111), (110) and (100) surfaces to one-third, one-third, and one-half monolayers respectively; the mean values determined by RBS are 0.30 ± 0.03, 0.31 ± 0.05, and 0.51 ± 0.04 respectively. These numbers are consistent with the XPS results.

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Title:

The Oxygen Coverage on Diamond Surfaces

Contributors:

Derry, T. E. (author) / Harris, P. E. (author) / Sellschop, J. P. F. (author) / Copperthwaite, R. G. (author) / Hansen, J. O. (author)

Published in:

The Structure of Surfaces II ; 384-392

Springer Series in Surface Sciences ; 11

Publication date:

1988-01-01

Size:

9 pages

ISBN:

978-3-642-73345-1 , 978-3-642-73343-7

ISSN:

DOI:

https://doi.org/10.1007/978-3-642-73343-7_64

Type of media:

Article/Chapter (Book)

Type of material:

Electronic Resource

Language:

English

Keywords:

Dangling Bond , Diamond Surface , Oxygen Coverage , Experimental Standard Deviation , Adhesion Tension Physics , Surface and Interface Science, Thin Films , Surfaces and Interfaces, Thin Films , Crystallography

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