TY - JOUR
T1 - Electronic states and chemical reactivity of Si(1 0 0)c(4 × 2) surface at low temperature studied by high resolution Si 2p core level photoelectron spectroscopy
AU - Machida, S.
AU - Nagao, M.
AU - Yamamoto, S.
AU - Kakefuda, Y.
AU - Mukai, K.
AU - Yamashita, Y.
AU - Yoshinobu, J.
N1 - Funding Information:
This work was supported by JSPS Grants-in-Aid for Scientific Research, the Toray Science Foundation, the Murata Science Foundation, the Kao Foundation for Arts and Science, the Sumitomo Foundation, and the Japan Securities Scholarship Foundation. We gratefully acknowledge the help by Dr. J. Adachi and Prof. K. Ito at PF in KEK, and Ms. A. Harasawa, Dr. T. Okuda and Prof. T. Kinoshita at SRL-ISSP. All the experiments were performed under the PF-PAC approvals (nos. 00-G198 and 01-G209).
PY - 2003/6/10
Y1 - 2003/6/10
N2 - We have investigated the electronic states of clean and BF3 adsorbed Si(1 0 0) surfaces at low temperature by means of high resolution Si 2p photoelectron spectroscopy. The peak intensities of upper atom and lower atom of the asymmetric dimer in Si 2p spectra do not change even at 30 K compared with those at higher temperature up to 300 K, indicating that the dimer is asymmetric in the ground state. In order to investigate chemical reactivity of asymmetric dimer on Si(1 0 0), a typical Lewis acid molecule BF3 is adsorbed on Si(1 0 0). We have found that BF3 molecules are dissociated into BF2 and F on Si(1 0 0) and dissociated species (BF2 and F) are adsorbed predominantly on the up dimer atoms of the asymmetric dimers.
AB - We have investigated the electronic states of clean and BF3 adsorbed Si(1 0 0) surfaces at low temperature by means of high resolution Si 2p photoelectron spectroscopy. The peak intensities of upper atom and lower atom of the asymmetric dimer in Si 2p spectra do not change even at 30 K compared with those at higher temperature up to 300 K, indicating that the dimer is asymmetric in the ground state. In order to investigate chemical reactivity of asymmetric dimer on Si(1 0 0), a typical Lewis acid molecule BF3 is adsorbed on Si(1 0 0). We have found that BF3 molecules are dissociated into BF2 and F on Si(1 0 0) and dissociated species (BF2 and F) are adsorbed predominantly on the up dimer atoms of the asymmetric dimers.
KW - Halides
KW - Photoelectron spectroscopy
KW - Silicon
UR - http://www.scopus.com/inward/record.url?scp=0038137592&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0038137592&partnerID=8YFLogxK
U2 - 10.1016/S0039-6028(03)00177-8
DO - 10.1016/S0039-6028(03)00177-8
M3 - Conference article
AN - SCOPUS:0038137592
SN - 0039-6028
VL - 532-535
SP - 716
EP - 720
JO - Surface Science
JF - Surface Science
T2 - Proceedings of the 7th International Conference on Nanometer
Y2 - 29 August 2002 through 31 August 2002
ER -