24 November 2010 Laser scattering in water and aqueous solutions of salts
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Proceedings Volume 7376, Laser Applications in Life Sciences; 73761D (2010) https://doi.org/10.1117/12.871150
Event: Laser Applications in Life Sciences 2010, 2010, Oulu, Finland
Abstract
An automated laser polarimetric scatterometer, operating at a wavelength of 532nm, has been developed for measuring the total scattering matrix of liquid samples in a cylindrical geometry. The optical scheme of the polarimeter combines an electro-optic modulator with a rotary quarter-wave plate. The results of experiments involving distilled water and NaCl aqueous solutions are reported. The measured angular dependencies of the elements of the scattering matrix are compared with numerical computations based on the T-matrix method. The experimental scattering matrix data can be interpreted as a scattering on an ensemble of stochastic micron-scale clusters composed of polydisperse air bubbles having effective radii of 70-100 nm. The fractal dimension of such clusters was evaluated as 2.5-2.8. Their concentration increases with salt addition from 103 cm-3 in distilled water to 106 cm-3 in 0.8 M aqueous solution of NaCl.
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Nikolai F Bunkin, Alexey V. Shkirin, Valeriy A. Kozlov, Artem V. Starosvetskiy, "Laser scattering in water and aqueous solutions of salts", Proc. SPIE 7376, Laser Applications in Life Sciences, 73761D (24 November 2010); doi: 10.1117/12.871150; https://doi.org/10.1117/12.871150
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