TITLE

# ADSORPTION REACTION OF POLAR ORGANIC MOLECULES ON ${\rm Si}^+_n$ CLUSTER IONS

AUTHOR(S)
Nakagawara, Wakana; Tsunoyama, Hironori; Furuya, Ari; Misaizu, Fuminori; Ohno, Koichi
PUB. DATE
July 2005
SOURCE
International Journal of Modern Physics B: Condensed Matter Phys;7/10/2005, Vol. 19 Issue 15-17, p2502
SOURCE TYPE
DOC. TYPE
Article
ABSTRACT
We have examined chemical reactions of small silicon cluster ions ${\rm Si}^+_n$ for n = 7 - 16 with polar organic molecules M (M = CH3CN, CD3OD, C2H5CN, and C2H5OH). The intensities of the adsorption products ${\rm Si}_n {\rm M}^+_m$ for m = 1 and 2 were investigated as a function of n. We found for all polar molecules that the relative intensity of SinM+ to the unreacted ${\rm Si}^+_n$ is smaller for n = 11, 13, and 14, that is, the adsorption reactivity is smaller for these n than others. It was also commonly observed that the ${\rm Si}_9 {\rm M}^+_2$ ion are more intense than neighboring n. We discussed the relationship of the reactivity with the geometrical structures and the stabilities of the bare ${\rm Si}^+_n$ ions and adsorbed ${\rm Si}_n ({\rm CH}_3 {\rm CN})^+_m$ ions, from theoretical calculations based on density functional theory.
ACCESSION #
17997096

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