Photoacoustic Response Formation in Nanostructured Composite Systems «Porous Matrix – Liquid»

Authors	K. Voitenko¹, D. Andrusenko¹, A. Pastushenko², M. Isaiev¹, A.G. Kuzmich¹, R.M. Burbelo¹,
Affiliations	¹ Taras Shevchenko National University of Kyiv, 64/13, Volodymyrska Str., 01601 Kyiv, Ukraine ² University of Lyon, Nanotechnology Institute of Lyon, UMR CNRS 5270, INSA de Lyon, F69621, France
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Issue	Volume 9, Year 2017, Number 4
Dates	Received 16 May 2017; revised manuscript received 25 July 2017; published online 27 July 2017
Citation	K. Voitenko, D. Andrusenko, A. Pastushenko, et al., J. Nano- Electron. Phys. 9 No 4, 04021 (2017)
DOI	10.21272/jnep.9(4).04021
PACS Number(s)	81.05.Rm, 81.70.Cv
Keywords	Photoacoustic response, Mesoporous silicon, Composite system «porous matrix -liquid».
Annotation	The results of experimental studies of the processes of photoacoustic response formation in nanostructured composite systems «porous matrix-liquid» are presented. The cases of low-frequency periodic modulation and pulsed laser excitation are considered. It is established that in both cases the amplitude of the photoacoustic response increases substantially with the matrix porosity increase. A simplified model of a composite system based on a porous matrix was proposed, which allowed to carry out correct estimates of the Young's modulus and the thermal expansion coefficients of composite systems with different porosity, as well as the amplitude of the acoustic response (in agreement with experiment).
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