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Ion Desorption by Inner-shell Excitation and Photodegradation of Poly(vinylidene fluoride)

Published online by Cambridge University Press:  26 February 2011

Koji Okudaira
Affiliation:
okudaira@faculty.chiba-u.jp, Chiba University, Faculty of Engineering, 1-33 Yayoi-cho, Inage-ku, Chiba, Chiba, 263-8522, Japan, +81-43-290-3446
Eiichi Kobayashi
Affiliation:
, Chiba University, Faculty of Engineering, 1-33 Yayoi-cho, Inage-ku, Chiba, Chiba, 263-8522, Japan, +81-43-290-3446
Satoshi Kera
Affiliation:
, Chiba University, Faculty of Engineering, 1-33 Yayoi-cho, Inage-ku, Chiba, Chiba, 263-8522, Japan, +81-43-290-3446
Kazuhiko Mase
Affiliation:
, Chiba University, Faculty of Engineering, 1-33 Yayoi-cho, Inage-ku, Chiba, Chiba, 263-8522, Japan, +81-43-290-3446
Nobuo Ueno
Affiliation:
, Chiba University, Faculty of Engineering, 1-33 Yayoi-cho, Inage-ku, Chiba, Chiba, 263-8522, Japan, +81-43-290-3446
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Abstract

Auger electron spectra (AES) and Auger electron photo-ion coincidence (AEPICO) spectra of poly(vinlylidene fluoride) (PVDF) were observed to study the mechanism of effective fluorine ion (F+) desorption by irradiation of photons corresponding to the transition from F 1s to s(C-F). In the AES at photon energy (hυ) = 690.3 eV (from F1s to |σ|(C-F)), the spectator-Auger shift is about 3 eV. At hn = 690.3 eV the contribution of spectator Auger electron to the observed Auger spectrum is large. In the F+ AEPICO spectra at hυ = 690.3 eV an intense peak appears. The peak positions of the F+ AEPICO spectra are in agreement with those of the Auger spectra. These results indicate that the mechanism for effective F+ ion desorption induced by the transition from F1s to σ(C-F) occurs through the spectator-Auger processes. The efficiency of ion desorption depends on the electronic structure of the spectator-Auger final state.

Type
Research Article
Copyright
Copyright © Materials Research Society 2006

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References

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Ion Desorption by Inner-shell Excitation and Photodegradation of Poly(vinylidene fluoride)
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