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Light scattering by liquid surfaces, new developments
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DOI：10.1016/j.cis.2021.102368.png)
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Abstract
En 中文
The surface light scattering technique is presented, highlighting recent technical improvements and describing studies of various types of surfaces. The technique is non-invasive, but delicate to handle and no commercial instruments are available yet. The technique gives however interesting information difficult to obtain otherwise, for instance on out-of-equilibrium surfaces, surfaces of very low tension, or systems dose to solidification. Many studies were performed with monolayers of surface active molecules at the surface of water. In this case, surface viscoelastic parameters can be determined at high frequencies (10 kHz - 1 MHz), complementing usefully the data obtained at lower frequencies with other techniques. As with these other techniques, inconsistencies such as negative surface viscosities are sometimes reported. The origin of these anomalies is not yet fully clarified. The problem deserves further work, in order to achieve a satisfactory description of the motion of surfactant or polymer laden surfaces. (C) 2021 Elsevier B.V. All rights reserved.
Keywords:
Liquid surfaces
Thermal fluctuations
Light scattering
Monolayers at liquid surfaces
Surface theology
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