2010
DOI: 10.1166/jctn.2010.1400
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Initial Stages of Ag Adsorption on Si(111)-7 × 7 Surface

Abstract: Initial stages of Ag atoms adsorption on Si(111)-7 × 7 surface were studied by first-principles calculations. The results showed that the most stable adsorption position for a single Ag atom is at S sites, which are almost in the middle between H 3 and B 2 high coordination sites. When two single Ag atoms are adsorbed on a Si half unit cell, they prefer to adsorb on the two closest S sites and form weak Ag-Ag bond.

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Cited by 3 publications
(4 citation statements)
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“…As shown in Figure (a), when the coverage is relatively low (2.5 min corresponds to ∼0.006 ML), most of the Ag atoms in HUCs form Ag1 (Ag monomer) and Ag2 (Ag dimer) structures, as indicated by the arrows. Their morphologies in STM images result from one- or two-Ag atom hopping within the HUCs at a much faster rate than the scanning speed of the STM tip and thus represent their characteristic time-averaged STM images. In this paper, a Ag structure in a HUC containing n Ag atoms is donated by Ag n . If the type of the HUC is distinguished, it is donated by n F or n U for n Ag atoms in FHUC and UHUC, respectively.…”
Section: Resultsmentioning
confidence: 97%
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“…As shown in Figure (a), when the coverage is relatively low (2.5 min corresponds to ∼0.006 ML), most of the Ag atoms in HUCs form Ag1 (Ag monomer) and Ag2 (Ag dimer) structures, as indicated by the arrows. Their morphologies in STM images result from one- or two-Ag atom hopping within the HUCs at a much faster rate than the scanning speed of the STM tip and thus represent their characteristic time-averaged STM images. In this paper, a Ag structure in a HUC containing n Ag atoms is donated by Ag n . If the type of the HUC is distinguished, it is donated by n F or n U for n Ag atoms in FHUC and UHUC, respectively.…”
Section: Resultsmentioning
confidence: 97%
“…30,34,35,39 Previous experimental and theoretical works have shown the growth behavior of Ag on a Si(111)-(7 Â 7) surface in terms of the occupancy and occupancy preference between FHUC and UHUC. 34,40 The adsorption and diffusion of a single Ag atom, [41][42][43] the adsorption site of two Ag atoms, 44 and the rectification behavior of a three Ag atom cluster 45 on Si(111)-(7 Â 7) have also been well studied, uncovering rich physics in this system. These results further inspire our interest in Ag nanostructures with more atoms.…”
Section: -34mentioning
confidence: 99%
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