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

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

    Research output: Contribution to journalArticle

    21 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)1067-1070
    Number of pages4
    JournalRadiation Physics and Chemistry
    Volume78
    Issue number12
    DOIs
    Publication statusPublished - 2009 Dec

    Fingerprint

    polyimides
    ion beams
    Kapton (trademark)
    irradiation
    benzene
    rings
    linear energy transfer (LET)
    air
    imides
    visible spectrum
    heavy ions
    infrared spectroscopy
    absorption spectra
    optical properties
    orbitals
    shift
    room temperature
    electronics
    wavelengths
    spectroscopy

    Keywords

    • Energy gap
    • Infrared spectroscopy
    • Ion beam
    • Polyimide
    • UV-vis spectroscopy

    ASJC Scopus subject areas

    • Radiation

    Cite this

    Ion-beam irradiation effects on polyimide-UV-vis and infrared spectroscopic study. / Kudo, H.; Sudo, S.; Oka, T.; Hama, Y.; Oshima, A.; Washio, Masakazu; Murakami, T.

    In: Radiation Physics and Chemistry, Vol. 78, No. 12, 12.2009, p. 1067-1070.

    Research output: Contribution to journalArticle

    Kudo, H. ; Sudo, S. ; Oka, T. ; Hama, Y. ; Oshima, A. ; Washio, Masakazu ; Murakami, T. / Ion-beam irradiation effects on polyimide-UV-vis and infrared spectroscopic study. In: Radiation Physics and Chemistry. 2009 ; Vol. 78, No. 12. pp. 1067-1070.
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    AU - Oka, T.

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    AU - Oshima, A.

    AU - Washio, Masakazu

    AU - Murakami, T.

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    KW - UV-vis spectroscopy

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