Anisotropic surface diffusion of CO on Ni(110)

Xu Dong Xiao, X. D. Zhu, W. Daum, Y. R. Shen

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Abstract

Anisotropic surface diffusion of CO on Ni(110) has been studied using the newly developed technique of optical second-harmonic diffraction from a laser-induced CO monolayer grating. Two distinct orthogonal diffusion channels, along [110]_and [001], were found. The measured diffusion coefficients yield the diffusion activation energies Ed(110) = 1.1 ± 0.2 kcal/mol and Ed(001) = 3.1 ± 0.4 kcal/mol and the preexponential factors D0(110) = (3.8 ± 2.0) × 10-9 cm2/sec and D0(001) = (4.8 ± 4.4) × 10-6 cm2/sec. The anisotropy in the surface diffusion appears to cross over at T ̃ 160 K.

Original languageEnglish (US)
Pages (from-to)2352-2355
Number of pages4
JournalPhysical Review Letters
Volume66
Issue number18
StatePublished - 1991

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surface diffusion
diffusion coefficient
gratings
activation energy
harmonics
anisotropy
diffraction
lasers

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Xiao, X. D., Zhu, X. D., Daum, W., & Shen, Y. R. (1991). Anisotropic surface diffusion of CO on Ni(110). Physical Review Letters, 66(18), 2352-2355.

Anisotropic surface diffusion of CO on Ni(110). / Xiao, Xu Dong; Zhu, X. D.; Daum, W.; Shen, Y. R.

In: Physical Review Letters, Vol. 66, No. 18, 1991, p. 2352-2355.

Research output: Contribution to journalArticle

Xiao, XD, Zhu, XD, Daum, W & Shen, YR 1991, 'Anisotropic surface diffusion of CO on Ni(110)', Physical Review Letters, vol. 66, no. 18, pp. 2352-2355.
Xiao XD, Zhu XD, Daum W, Shen YR. Anisotropic surface diffusion of CO on Ni(110). Physical Review Letters. 1991;66(18):2352-2355.
Xiao, Xu Dong ; Zhu, X. D. ; Daum, W. ; Shen, Y. R. / Anisotropic surface diffusion of CO on Ni(110). In: Physical Review Letters. 1991 ; Vol. 66, No. 18. pp. 2352-2355.
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