This article is cited in 2 papers

Photothermoacoustic conversion in porous matrix-liquid filler systems

D. A. Andrusenko, R. M. Burbelo, A. G. Kuz'mich

National Taras Shevchenko University of Kyiv

Abstract: Features of the photothermoacoustic conversion in systems of the porous silicon-liquid filler type on a single crystal silicon substrate have been experimentally studied. It is established that the presence of liquid in the pores leads to a significant increase in the photoacoustic signal amplitude and front slope, which is explained by a significant contribution of the liquid pressure to thermoinduced stresses in the material. The extrema observed in time series of the photoacoustic signal in the case of a low-viscosity liquid are related to the process of pressure relaxation in the pores.

Received: 08.07.2010

 English version: Technical Physics Letters, 2010, 36:12, 1121–1124

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