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M. V. Galkin, Ye. V. Ageeva, D. A. Nedosekin, M. A. Proskurnin, A. Yu. Olenin, G. M. Mokrousov
Application
of the thermal lens laser spectrometry to synthesis and investigation of
nanocomposites based on silver salts sorbed by polyacrylate matrix
Abstract
Thermal-lens laser
spectrometry was used to determination of the light absorbance of the
transparent nanocomposites prepared by thermal decomposition of silver salts
sorbed by polyacrylate matrix. High resolution of the method determined by the
waist of the laser beams used allows determining uniformity of the light
absorption in the matrix. Thermal lensing compared to spectrophotometry is less
affected by the light scattering of the sample. The sensitivity of
determination is also higher than in the case of spectrophotometry by an order
or two of a magnitude. Laser irradiation interaction with the source
polyacrylic matrices filled with silver salts exhibits the possibility of local
silver nanoparticles synthesis in the matrix caused by photoinduced
decomposition of the silver salts. The dimensions of the zone containing formed
nanoparticles correspond to the waist of the excitation laser beam used. The
possibility to unite in the frames of the thermal lens experiment both the
synthesis of nanoparticles and on-line determination of the light absorbance of
the formed particles in nanocomposite is discussed.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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