Study of the evaporation of thin layers of liquids by photothermal techniques
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- Martinez-Torres, P. & Alvarado-Gil, J. Eur. Phys. J. Spec. Top. (2008) 153: 65. doi:10.1140/epjst/e2008-00394-7
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The analysis of dynamics of the evaporation process of a solvent on top of a substrate is investigated using photothermal techniques. The method consists on the illumination of an opaque metallic substrate with a modulated laser and the detection of the heating on the illuminated zone using photoacoustics. It is shown that at the last stage of the process the formation of the meniscus must be taken into account. In order to analyze the experimental data an effective model for the liquid layer is considered as well as the slowing down of the rate of evaporation due to the meniscus.