Experimental study on air-liquid interface effect of Brownian dynamics using spectral-domain low-coherence dynamic light scattering
Experimental study on air-liquid interface effect of Brownian dynamics using spectral-domain low-coherence dynamic light scattering
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DOI：
10.1007/s10043-014-0058-1
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发表时间：
2014-06
期刊：
影响因子：
1.2
通讯作者：
T. Watarai;T. Iwai
中科院分区：
文献类型：
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作者：
T. Watarai;T. Iwai
通过基于谱域低相干动态光散射的一次性分析技术研究了气液界面附近布朗粒子的空间变动力学。 “一次”一词是指在不进行任何扫描操作的情况下，根据散射位置同时无缝地测量随时间变化的强度的时间自相关函数。实验证实，布朗运动在靠近气液界面的区域被抑制，通过增加与界面的距离而被激活，并且在远离界面时变得自由扩散。这项工作被认为是气液界面附近空变布朗动力学的首次实验证实。
Space-variant dynamics of Brownian particles near an air-liquid interface is investigated by a one-shot analysis technique based on spectral-domain low-coherence dynamic light scattering. The expression “one shot” refers to the simultaneous and seamless measurement of temporal autocorrelation functions of the time-varying intensity depending on the scattering position without any scanning operation. It is experimentally confirmed that the Brownian motion is suppressed in a region close to an air-liquid interface, is activated by increasing the distance from the interface, and becomes freely diffusive far from the interface. This work is considered to be the first experimental confirmation of space-variant Brownian dynamics in the vicinity of an air-liquid interface.