| AVS 54th International Symposium | |
| Applied Surface Science | Tuesday Sessions |
| Session AS-TuP |
| Session: | Aspects of Applied Surface Science Poster Session |
| Presenter: | H.Y. Park, Korea Research Institute of Chemical Technology |
| Authors: | H.Y. Park, Korea Research Institute of Chemical Technology S.H. Kim, Sungkyunkwan University, Korea J.R. Ahn, Sungkyunkwan University, Korea K.-S. An, Korea Research Institute of Chemical Technology |
| Correspondent: | Click to Email |
The chemical adsorption of Na with 1,3-butadiene (BD)overlayer on Si(100)2x1 surface have been studied using X-ray photoelectron spectroscopy and synchrotron radiation photoemission spectroscopy in order to investigate the possibility of organic molecule-metal multilayered structure on semiconductor surface using unsaturated functional group of molecule on the top layer. As well known, the ethylene-like overlayer was induced by BD adsorption on Si(100)2x1 surface with [4+2] cycloaddition reaction (Diels-Alder reaction) at RT without breaking Si dimer. At low coverage of Na adsorption on the BD overlayer, large binding energy shift of C 1s core level spectrum was induced, which may be explained by Fermi level shift due to charge transfer from adsorbed Na to anti-π bonding state of C=C. Interestingly, the BD overlayer induces metallic Na layer beyond the RT saturation at higher coverage although Na adsorption on clean Si(100)2x1 surface has a saturation coverage (1 monolayer by double layer model) at RT. In this study, from work function changes, core level shifts, and valence band spectra, the chemical reaction of Na with ethylene-like BD overlayer on Si(100)2x1 surface are discussed.