Abstract
Transmission EELS measurements have been carried out on a-C:H films deposited by ion plating from acetone or n-hexane plasma using various substrate potentials. The calculated dielectric functions show low optical absorption in the range of 4 eV to 8 eV. The amount of sp3 hybridizised C atoms has been estimated by integration over the π* and σ* band ranges in the core loss spectra.
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