The optical properties of nanodisperse silica in hydrothermal solutions |
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| Authors: | V V Potapov A A Revina E K Baranova |
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| Institution: | (1) Geotechnological Scientific Research Center, Russian Academy of Sciences, Petropavlovsk-Kamchatskii, Russia;(2) Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 117071, Russia |
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| Abstract: | The optical properties of aqueous solutions of colloidal silica were studied by photon correlation spectroscopy and spectrophotometry. Photon correlation spectroscopy measurements were taken at a 633 nm wavelength of monochromatic laser radiation. Autocorrelation function and scattered light amplitude plots were constructed, and the mean radii and diffusion coefficients of particles were determined. Spectrophotometric measurements were taken over the electromagnetic radiation wavelength range 200–1000 nm. The positions of optical density maxima were determined. The influence of various factors, including concentration, the size of nanoparticles, temperature, and pH, on the optical properties of aqueous solutions of silica was estimated. |
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