Quasi-elastic Laser Scattering for Measuring Inhomogeneous Interfacial Tension in Non-equilibrium Phenomena with Convective Flows
Quasi-elastic Laser Scattering for Measuring Inhomogeneous Interfacial Tension in Non-equilibrium Phenomena with Convective Flows
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DOI：
10.2116/analsci.30.707
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发表时间：
2014-07
影响因子：
1.6
通讯作者：
Tomonori Nomoto;T. Toyota;M. Fujinami
中科院分区：
文献类型：
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作者：
Tomonori Nomoto;T. Toyota;M. Fujinami
界面张力的不均匀分布可以通过对流或溶质Marangoni效应在界面处诱导不同类型的非平衡自发运动。本文介绍了准弹性激光散射（QELS）方法在研究这些效应中的几个应用。界面张力和非平衡现象之间的关系已被实验验证为每个应用程序。在一个水/硝基苯振荡系统与连续的表面活性剂除了界面，在界面处的表面活性剂的局部吸附已被证明，并显示出强烈相关的电解质的存在。在供体/膜/受体系统中，双光束QELS方法表明，在膜/受体界面的表面活性剂吸附是负责在电势的振荡。在Belousov-Zhabotinsky反应的传播化学波中考虑了金属络合物催化剂在空气/液体和液体/液体界面上吸附/脱附行为的差异。我们成功地测量了自走式樟脑船和漂浮在水相中的醇滴周围的界面张力分布，并比较了它们的运动机理。
An inhomogeneous distribution of interfacial tension can induce different types of non-equilibrium spontaneous motion at the interface by convective flow, or by the solutal Marangoni effect. Several applications of the quasi-elastic laser scattering (QELS) method used to study these effects are presented here. The relationship between the interfacial tension and the non-equilibrium phenomena has been verified experimentally for each application. In a water/nitrobenzene oscillatory system with continuous surfactant addition to the interface, the local adsorption of surfactants at the interface has been demonstrated and shown to be strongly related to the presence of electrolytes. In a donor/membrane/acceptor system, the dual-beam QELS method shows that surfactant adsorption at the membrane/acceptor interface is responsible for oscillations in the electric potential. The differences in the adsorption/desorption behavior of metal complex catalysts between air/liquid and liquid/liquid interfaces were considered in the propagating chemical waves of the Belousov-Zhabotinsky reaction. We successfully measured the distribution of interfacial tension around a self-propelled camphor boat and an alcohol droplet floating on an aqueous phase, and compared the mechanisms of their motion.