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Amorphous hydrogenated carbon films were formed on the Si (100) wafers by a direct-ion beam deposition method from pure acetylene and acetylene-hydrogen gas mixtures. The films were irradiated with a nanosecond Nd:YAG laser working at the first harmonics (λ_1=1064 nm), the fourth harmonics (λ_4=266 nm) or with a Nd:YVO_4 laser working at the third harmonic (λ_3=355 nm). The films were studied by the Raman scattering, micro-Fourier transform infrared and Fourier transform infrared spectroscopies, null-ellipsometry, optical and scanning electron microscope, and Vickers hardness method. Irradiation by the wavelength λ_1=1064 nm leads to graphitization and formation of the silicon carbide, because of the silicon substrate decomposition. The samples were strongly modified after the irradiation by λ_3=355 nm - the thickness of the films decreased, and silicon carbide was formed. It was observed that nano-structured materials (e.g. carbon nano-onions, nc-diamond) were formed after the irradiation by λ_4=266 nm.
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874-876
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published
2013-05
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- Kaunas University of Technology, Studentų St. 50, LT-51368 Kaunas, Lithuania
author
- Kaunas University of Technology, Studentų St. 50, LT-51368 Kaunas, Lithuania
author
- Riga Technical University, 14 Azenes Str., LV-1068 Riga, Latvia
author
- Institute of Solid State Physics, University of Latvia, 8 Kengaraga St., LV-1063 Riga, Latvia
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bwmeta1.element.bwnjournal-article-appv123n523kz