Empty-state scanning tunneling microscopy image of C2H2 on Si(001) - new evidence for paired end-bridge di-sigma configuration
- Authors
- Wondong Kim; Hanchul Kim; Geunseop Lee; Young-Kyu Hong; Sekyung Lee; Ja-Yong Ko
- Issue Date
- Jul-2003
- Publisher
- Elsevier, the Netherlands
- Citation
- Surface Science, v.538, no.3, pp L477 - L482
- Journal Title
- Surface Science
- Volume
- 538
- Number
- 3
- Start Page
- L477
- End Page
- L482
- URI
- https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/149123
- DOI
- 10.1016/S0039-6028(03)00731-3
- ISSN
- 0039-6028
- Abstract
- New evidence of the paired end-bridge configuration in the room-temperature adsorption geometries of C2H2 molecules on Si(0 0 1) is presented by scanning tunneling microscopy (STM) and ab initio pseudopotential calculations. The distinct four-leaved feature occupying two adjacent Si dimer sites in the experimental empty-state STM images are well reproduced by simulations of the paired end-bridge adsorption configuration. Calculated energetics suggests that the Si(0 0 1) surface is covered by paired end-bridge structures at the saturation coverage of 1 ML, in agreement with the existing experiments.
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