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Title: Configuration dependent critical nuclei in the self assembly of magic clusters
Authors: Ong, W.J.
Tok, E.S. 
Issue Date: 2007
Citation: Ong, W.J., Tok, E.S. (2007). Configuration dependent critical nuclei in the self assembly of magic clusters. Physical Chemistry Chemical Physics 9 (8) : 991-995. ScholarBank@NUS Repository.
Abstract: Evidence for the formation of various 2-D structures possessing different numbers of Co-Si magic clusters (size ∼10.0 ± 0.5 Å), configurations and lifetimes are studied in real time on a Si(111)-(7 × 7) surface at elevated temperature in the STM. Observations of individual cluster diffusion, attachment and detachment dynamics resolve unequivocally the question of self assembly over surface reconstruction. The smallest stable structure consisting of seven individual Co-Si magic clusters arranged in a hexagonal closed packed formation (i = 7) is found to retain sufficient cohesive energy to avoid dissociation. A configuration dependent critical 2-D nuclei (i* = 6) is determined to exist in facilitating the self assembly dynamics. This journal is © the Owner Societies 2007.
Source Title: Physical Chemistry Chemical Physics
ISSN: 14639076
DOI: 10.1039/b616739j
Appears in Collections:Staff Publications

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