Optical Surface Tension Measurement Method for Microscale Liquid

DOI Web Site 28 References Open Access
  • HIBARA Akihide
    Institue of Multidisciplinary Research for Advanced Materials, Tohoku University

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  • 微小サイズ液体の光学的表面張力測定法

Abstract

<p>Quasi-elastic laser scattering (QELS) method is an optical scattering measurement technique by thermally excited capillary wave at gas / liquid and liquid / liquid interfaces. It can measure surface tension optically, which is a distinctive feature in micro-nano sciences. While conventional QELS method requires precise scattering-angle determination and light’s wavelength information for surface tension calculation, new QELS method utilizes spontaneous capillary wave resonance at spatially restricted interfaces in microchannels, microwells, and microdroplets, where the modes’ characteristics and their sizes are required for the tension. This paper provides an explanation of the principle of the method, demonstrats the measurements for gas / liquid interfaces in the microchannels, microwells, and microdroplets, and discusses the method’s usefulness for contemporary micro-nano sciences.</p>

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 72 (3), 79-86, 2023-03-05

    The Japan Society for Analytical Chemistry

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