Title: Measurement of thermo-optic coefficient of silicon dioxide nanofluid using interferometer

Authors: Hyun Woo Park; Teun-Teun Kim; Sok Won Kim

Addresses: Department of Physics, University of Ulsan, Ulsan 44610, South Korea ' Department of Physics, University of Ulsan, Ulsan 44610, South Korea ' Department of Physics, University of Ulsan, Ulsan 44610, South Korea

Abstract: Nanofluid technology has attracted considerable research attention in recent years. A Michelson interferometer was constructed, and a silicon dioxide (SiO₂) nanofluid was placed in the optical path. The thermo-optic coefficient (TOC) was obtained by counting the moving interference fringes while increasing the nanofluid temperature. Two nanofluid samples were prepared by dispersing 20 nm and 80 nm SiO₂ nanospheres in distilled water and conducting the experiments at two wavelengths, 532 nm and 633 nm. In the 20 nm SiO₂ nanofluid, the TOC changed from 8.038 × 10^-5/ºC to 1.695 × 10^-4/ºC as the temperature was increased from room temperature to 70°C at a wavelength of 532 nm, and the TOC was changed from 6.634 × 10^-5/ºC to 1.534 × 10^-4/ºC at a wavelength of 633 nm. In the 80 nm SiO₂ nanofluid, the TOC changed from 1.322 × 10^-4/ºC to 2.359 × 10^-4/ºC as the temperature was increased from room temperature to 70°C at a wavelength of 532 nm, and the TOC changed from 1.138 × 10^-4/ºC to 2.261 × 10^-4/ºC at a wavelength of 633 nm.

Keywords: silicon dioxide; nanofluids; michelson interferometer; TOC; thermo-optic coefficient; optical properties.

DOI: 10.1504/IJNT.2022.122366

International Journal of Nanotechnology, 2022 Vol.19 No.1, pp.43 - 49

Published online: 21 Apr 2022 *

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