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The ordering of the adsorbed NH3 molecules across the Si dimer rows on the Si(0 0 1) surface

Authors
Opti naguan ChungHanchul KimJa-Yong KooSukmin Chung
Issue Date
Jul-2008
Publisher
Elsevier BV
Keywords
Adsorption; Ammonia; Scanning tunneling microscopy; Silicon; Silicon nitride
Citation
Surface Science, v.602, no. 13, pp 69 - 73
Pages
5
Journal Title
Surface Science
Volume
602
Number
13
Start Page
69
End Page
73
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/14225
DOI
10.1016/j.susc.2008.04.013
ISSN
0039-6028
1879-2758
Abstract
Scanning tunneling microscopy was used to study the adsorption behaviors of NH3 molecules across Si dimer rows on a Si(0 0 1)-2 × 1 surface, taking into account the existence of both the on-dimer (OD) and inter-dimer (ID) adsorption configurations. In the OD configuration, the dissociated NH2 and H form bonds with two Si atoms of a dimer. On the other hand, in the ID configuration, they adsorb at two Si atoms on the same side of two adjacent dimers along the dimer row. The OD configurations on the neighboring dimer rows were preferentially aligned perpendicular to the dimer rows, indicating a strong attractive interaction across the dimer rows, whereas the NH3 molecules adsorbed in the ID configuration rarely showed ordering behavior.
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