Low-temperature STM images of methyl-terminated Si(111) surfaces

Hongbin Yu, Lauren J. Webb, Ryan S. Ries, Santiago D. Solares, William A. Goddard, James R. Heath, Nathan S Lewis

Research output: Contribution to journalArticle

113 Citations (Scopus)

Abstract

Low-temperature scanning tunneling microscopy (STM) has been used to image CH 3-terminated Si(111) surfaces that were prepared through a chlorination/alkylation procedure. The STM data revealed a well-ordered structure commensurate with the atop sites of an unreconstructed 1 × 1 overlayer on the silicon (111) surface. Images collected at 4.7 K revealed bright spots, separated by 0.18 ± 0.01 nm, which are assigned to adjacent H atoms on the same methyl group. The C-H bonds in each methyl group were observed to be rotated by 7 ± 3° away from the center of an adjacent methyl group and toward an underlying Si atom. Hence, the predominant interaction that determines the surface structure arises from repulsions between hydrogen atoms on neighboring methyl groups, and secondary interactions unique to the surface are also evident.

Original languageEnglish
Pages (from-to)671-674
Number of pages4
JournalJournal of Physical Chemistry B
Volume109
Issue number2
DOIs
Publication statusPublished - Jan 20 2005

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Scanning tunneling microscopy
scanning tunneling microscopy
Atoms
Chlorination
Alkylation
Silicon
Surface structure
chlorination
Temperature
Hydrogen
alkylation
atoms
hydrogen atoms
interactions
methylidyne
silicon

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Yu, H., Webb, L. J., Ries, R. S., Solares, S. D., Goddard, W. A., Heath, J. R., & Lewis, N. S. (2005). Low-temperature STM images of methyl-terminated Si(111) surfaces. Journal of Physical Chemistry B, 109(2), 671-674. https://doi.org/10.1021/jp047672m

Low-temperature STM images of methyl-terminated Si(111) surfaces. / Yu, Hongbin; Webb, Lauren J.; Ries, Ryan S.; Solares, Santiago D.; Goddard, William A.; Heath, James R.; Lewis, Nathan S.

In: Journal of Physical Chemistry B, Vol. 109, No. 2, 20.01.2005, p. 671-674.

Research output: Contribution to journalArticle

Yu, H, Webb, LJ, Ries, RS, Solares, SD, Goddard, WA, Heath, JR & Lewis, NS 2005, 'Low-temperature STM images of methyl-terminated Si(111) surfaces', Journal of Physical Chemistry B, vol. 109, no. 2, pp. 671-674. https://doi.org/10.1021/jp047672m
Yu H, Webb LJ, Ries RS, Solares SD, Goddard WA, Heath JR et al. Low-temperature STM images of methyl-terminated Si(111) surfaces. Journal of Physical Chemistry B. 2005 Jan 20;109(2):671-674. https://doi.org/10.1021/jp047672m
Yu, Hongbin ; Webb, Lauren J. ; Ries, Ryan S. ; Solares, Santiago D. ; Goddard, William A. ; Heath, James R. ; Lewis, Nathan S. / Low-temperature STM images of methyl-terminated Si(111) surfaces. In: Journal of Physical Chemistry B. 2005 ; Vol. 109, No. 2. pp. 671-674.
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