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Photo Petter Persson

Petter Persson

Senior lecturer

Photo Petter Persson

High Resolution X-Ray Photoelectron Spectroscopy and INDO/S-CI Study of the Core Electron Shakeup States of PMDA-ODA Polyimide

Author

  • Y. Nakayama
  • Petter Persson
  • S. Lunell
  • S. P. Kowalczyk
  • B. Wannberg
  • U. Gelius

Summary, in English

Pyromellitic dianhydride-4,4-oxydianiline (PMDA–ODA) polyimide films have been studied using high resolution x-ray photoelectron spectroscopy and model semi-empirical INDO/S–CI calculations. Experimental and theoretical C 1s, N 1s, and O 1s spectra are presented, and found to be in good agreement with each other. Shakeup features of the spectra are identified, and their electronic nature analyzed theoretically. The highly nonstoichiometric ratio between the carbonyl and the ether O 1s main peaks is quantitatively explained by the calculations, where the nonstoichiometry is shown to be the result of stronger carbonyl than ether shakeup. Conformational effects on the shakeup spectra, due to torsion between the PMDA and ODA units, were investigated theoretically and found to be small for PMDA–ODA.

Publishing year

1999

Language

English

Pages

2791-2799

Publication/Series

Journal of Vacuum Science & Technology. A. Vacuum, Surfaces, and Films

Volume

17

Issue

5

Document type

Journal article

Publisher

American Institute of Physics (AIP)

Topic

  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1520-8559