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Laser-induced effects in raman spectra of nanocrystalline silicon

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Abstract

Investigations into the action of continuous laser radiation with a wavelength of 532 nm on particles of nanocrystalline silicon (nc-Si) obtained by the method of laser pyrolysis of monosilane have been carried out for the first time using Raman (combination scattering (RS)) spectroscopy. It is established that the action of rather powerful radiation (105–106 W/cm2) causes substantial changes in the state of nc-Si which are associated with the development of thermooxidative processes in air, leading to a complex character of the change in the RS band belonging to nc-Si. The process of the matrix introduction of nc-Si particles into microparticles of low-density polyethylene is achieved with the use of SCF impregnation into a SC-CO2 medium. It is established that the action of laser radiation on nc-Si particles in a polymer matrix starts manifesting as a change in the RS band at power densities much greater than those in the case of a pure nc-Si powder.

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Authors and Affiliations

  1. Skobel’tsin Scientific Research Institute of Nuclear Physics, Moscow State University, Moscow, Russia

    A. O. Rybaltovskii

  2. Federal State Budget Institution of Science, Institute of Problems of Laser and Information Technologies, Russian Academy of Sciences, Troitsk, Moscow oblast, Russia

    V. N. Bagratashvili & N. V. Minaev

  3. Lomonosov Moscow University of Fine Chemical Technologies, Moscow, Russia

    A. A. Ishchenko, A. A. Krutikova & A. A. Ol’khov

  4. Federal State Budget Institution of Science, Prokhorov Institute of General Physics, Russian Academy of Sciences, Moscow, Russia

    N. N. Kononov

  5. Faculty of Chemistry, Moscow State University, Moscow, Russia

    S. G. Dorofeev

Authors
  1. A. O. Rybaltovskii
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  2. V. N. Bagratashvili
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  3. A. A. Ishchenko
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  4. N. V. Minaev
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  5. N. N. Kononov
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  6. S. G. Dorofeev
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  7. A. A. Krutikova
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  8. A. A. Ol’khov
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Correspondence to A. O. Rybaltovskii.

Additional information

Original Russian Text © A.O. Rybaltovskii, V.N. Bagratashvili, A.A. Ishchenko, N.V. Minaev, N.N. Kononov, S.G. Dorofeev, A.A. Krutikova, A.A. Ol’khov, 2012, published in Rossiiskie Nanotekhnologii, 2012, Vol. 7, Nos. 7–8.

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Rybaltovskii, A.O., Bagratashvili, V.N., Ishchenko, A.A. et al. Laser-induced effects in raman spectra of nanocrystalline silicon. Nanotechnol Russia 7, 421–427 (2012). https://doi.org/10.1134/S1995078012040106

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  • DOI: https://doi.org/10.1134/S1995078012040106

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