Influence of electromagnetic radiation on the phase composition of clustered CNx films |
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Authors: | Z. A. Samoilenko E. I. Pushenko N. N. Ivakhnenko V. N. Varyukhin A. M. Prudnikov R. V. Shalaev |
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Affiliation: | (1) Galkin Physicotechnical Institute, National Academy of Sciences of Ukraine, ul. Rozy Lyuksemburg 72, Donetsk, 83114, Ukraine |
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Abstract: | The effect of white and UV radiation on the phase composition of amorphous CN x films are studied by X-ray diffraction analysis and visible-range spectroscopy. The films have variable-range atomic order and consist of amorphous graphite clusters (30 Å) crystalline clusters (50–100 Å) of graphite, diamond, and carbon nitride phases; and intercluster medium with long-range (1–2 Å) atomic order. It is shown that irradiation of the films by white light facilitates the growth of fine graphite clusters. Irradiation by UV light suppresses the growth of the graphite and carbon nitride phases, favoring the growth of the diamond phase (1.5%). It is demonstrated that a change in the mesoscopic phase composition of the CN x films causes a change in the energy gap width in the visible range from E g = 0.75 eV for the films irradiated by white light to E g = 1.75 eV for those exposed to UV radiation. |
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