TY - JOUR
T1 - Interaction of C60 with Si(111) 7 × 7 and Si(100) 2 × 1 surfaces studied by STM, PES and HREELS
T2 - Proceedings of the 1998 International Symposium on Surface and Interface: Properties of Different Symmetry Crossing 98 (ISSI PDSC-98)
AU - Suto, S.
AU - Sakamoto, K.
AU - Kondo, D.
AU - Wakita, T.
AU - Kimura, A.
AU - Kakizaki, A.
AU - Hu, C. W.
AU - Kasuya, A.
N1 - Funding Information:
The authors would like to thank Professor Wakio Uchida for his valuable discussions. This work was supported in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports and Culture and the Kurata Research Grant.
PY - 1999/9/10
Y1 - 1999/9/10
N2 - We report here measurements of the valence band spectra, the C 1s core level spectra and the vibrational excitation spectra of a C60 monolayer (ML) film on Si(111) 7 × 7 and Si(100) 2 × 1 surfaces, using photoelectron spectroscopy and high-resolution electron energy loss spectroscopy (HREELS) in combination with scanning tunneling microscopy. 1 ML films are formed after annealing the 5 ML films at 670 K. The bonding states between C60 molecules and Si substrates are clearly observed at 2.1 eV on both surfaces in the valence band spectra. The shift of binding energies of the molecular orbitals and the C 1s core level spectra indicate the charge transfer. The softening of several vibrational modes is observed on the Si(111) 7 × 7 and Si(100) 2 × 1 surfaces with HREELS. The charge transfer scheme explains the softening well. We discuss the bonding nature in terms of hybridization of C60 molecular orbitals with the surface states.
AB - We report here measurements of the valence band spectra, the C 1s core level spectra and the vibrational excitation spectra of a C60 monolayer (ML) film on Si(111) 7 × 7 and Si(100) 2 × 1 surfaces, using photoelectron spectroscopy and high-resolution electron energy loss spectroscopy (HREELS) in combination with scanning tunneling microscopy. 1 ML films are formed after annealing the 5 ML films at 670 K. The bonding states between C60 molecules and Si substrates are clearly observed at 2.1 eV on both surfaces in the valence band spectra. The shift of binding energies of the molecular orbitals and the C 1s core level spectra indicate the charge transfer. The softening of several vibrational modes is observed on the Si(111) 7 × 7 and Si(100) 2 × 1 surfaces with HREELS. The charge transfer scheme explains the softening well. We discuss the bonding nature in terms of hybridization of C60 molecular orbitals with the surface states.
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U2 - 10.1016/S0039-6028(99)00576-2
DO - 10.1016/S0039-6028(99)00576-2
M3 - Conference article
AN - SCOPUS:0033308308
SN - 0039-6028
VL - 438
SP - 242
EP - 247
JO - Surface Science
JF - Surface Science
IS - 1-3
Y2 - 19 November 1998 through 21 November 1998
ER -