Micro-Raman study of the carbonization of polyimide induced by swift heavy ion irradiations
作者： J.-M. Costantini , F. Couvreur , J.-P. Salvetat , S. Bouffard
DOI: 10.1016/S0168-583X(02)00669-9
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摘要: Abstract We have done an extensive study of damage polyimide (Kapton-H) thin films by heavy ion irradiations in the 1 MeV amu −1 energy range. found that irradiation-induced insulator–conductor transition proceeds through four stages on basis progressive formation a 3D graphite-like structure when track overlaps increase. All bulk dc conductivity and paramagnetic center volume density data were rescaled plot versus fluence ( φt ) times electronic stopping power S e squared i.e. φtS 2 . Visible micro-Raman spectra recorded order to monitor ion-induced modifications. It is seen spectral features pristine polymer progressively disappear during I II, only two broad peaks at around 1360 1580 cm , corresponding respectively well-known D G bands disordered graphitic materials, remain III IV regardless ion. address evolution material according
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