Electronic structure of poly(tetrafluoroethylene) studied by UPS, VUV absorption, and band calculations

Kazuhiko Seki, Hiroshi Tanaka, Toshiaki Ohta, Yuriko Aoki, Akira Imamura, Hitoshi Fujimoto, Hiromichi Yamamoto, Hiroo Inokuchi, Hiroshi Tanaka, Yuriko Aoki, Hiromichi Yamamoto

Research output: Contribution to journalArticlepeer-review

76 Citations (Scopus)

Abstract

The electronic structure of poly(tetrafluoroethylene) (PTFE) was studied by UPS, VUV absorption, and ab-initio MO calculations. The UPS spectra give a photoemission threshold energy of 10.6eV, with deeper valence band features consistent with the reported XPS and the oligomer vapour UPS spectra. The UPS spectra are also consistent with the density of states derived from the calculated band structure, which indicates that the uppermost part of the valence band is formed from the C and F 2p orbitals with C-C bonding and C-F antibonding combinations. The VUV absorption spectrum shows an intense peak at 7.7eV, which most probably corresponds to the valence excitation from the top of the valence band to the bottom of the conduction band. With these data, the structure of the occupied and vacant states are deduced.

Original languageEnglish
Pages (from-to)167-171
Number of pages5
JournalPhysica Scripta
Volume41
Issue number1
DOIs
Publication statusPublished - Jan 1 1990
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Mathematical Physics
  • Condensed Matter Physics

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