Ion-beam irradiation effects on polyimide-UV-vis and infrared spectroscopic study

H. Kudo*, S. Sudo, T. Oka, Y. Hama, A. Oshima, M. Washio, T. Murakami

*この研究の対応する著者

研究成果査読

26 被引用数 (Scopus)

抄録

Ion-beam irradiation effects on polyimide, Kapton™, were studied with respect to optical and electronic properties. Stack films of Kapton™ (12.5 μm thick) were irradiated to various ion beams in air or vacuo at room temperature and subjected to ultraviolet-visible (UV-vis) spectroscopy, and change in absorbance and energy gap is discussed. The UV-vis absorption spectrum, which is assigned to the transition of electrons in benzene rings from π to π* orbital, upon He2+ (6 MeV/u) irradiation in air, shifted towards longer wavelength direction for all cases, and the shift was more obvious for higher linear energy transfer (LET) ion beams. The energy gap of the transition was estimated, and the H+ and He2+ ion beams caused little change in the transition energy gap Eg, while the heavier ions such as C6+ and Si14+ caused more significant decrease. This decrease is assumed to the structural changes around benzene rings, and the infrared spectroscopy revealed breakage in imide groups next to benzene ring in the repeating unit of polyimide.

本文言語English
ページ(範囲)1067-1070
ページ数4
ジャーナルRadiation Physics and Chemistry
78
12
DOI
出版ステータスPublished - 2009 12

ASJC Scopus subject areas

  • 放射線

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