INTRAMOLECULAR ENERGY BAND DISPERSION IN ORIENTED THIN FILM OFn-CF3(CF2)22CF3STUDIED BY ANGLE-RESOLVED UPS AND THEORETICAL SIMULATION

Daisuke Yoshimura, Kazuhiko Seki, Takayuki Miyamae, Hisao Ishii, Shinji Hasegawa, Koji Kamiya Okudaira and Nobuo Ueno
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Daisuke Yoshimura: Research Center for Materials Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
Kazuhiko Seki: Research Center for Materials Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
Takayuki Miyamae: National Institute of Materials and Chemical Research, 1-1 Higashi, Tsukuba 305-8565, Japan
Hisao Ishii: Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
Shinji Hasegawa: Institute for Molecular Science, Myodaiji-cho, Okazaki 444-8585, Japan
Koji Kamiya Okudaira: Department of Materials Science, Faculty of Engineering, Chiba University, Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
Nobuo Ueno: Department of Materials Science, Faculty of Engineering, Chiba University, Yayoi-cho, Inage-ku, Chiba 263-8522, Japan

Surface Review and Letters (SRL), 2002, vol. 09, issue 01, 407-412

Abstract: Electronic structure of perfluorotetracosane [n-CF3(CF2)22CF3; PFT], which is an oligomer of poly(tetrafluoroethylene) (PTFE), was investigated by angle-resolved photoemission spectroscopy (ARUPS) with synchrotron radiation. Theoretical simulations of ARUPS spectra were also performed by the independent atomic center (IAC) approximation combined with ab initio molecular orbital (MO) calculations. Measured normal-emission spectra for end-on oriented (the long-chain axis of PFT is perpendicular to the surface) films showed an incident photon energy dependence due to the intramolecular energy band dispersion. The energy band structure along the long-chain direction of PFT obtained from measured and calculated spectra is also discussed.

Date: 2002
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DOI: 10.1142/S0218625X02002397

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