Net motion of an ensemble of many Brownian particles captured with a self-mixing laser
Net motion of an ensemble of many Brownian particles captured with a self-mixing laser
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DOI：
10.1063/1.3156826
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发表时间：
2009-06
影响因子：
4
通讯作者：
K. Otsuka;T. Ohtomo;H. Makino;S. Sudo;J. Ko
中科院分区：
文献类型：
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作者：
K. Otsuka;T. Ohtomo;H. Makino;S. Sudo;J. Ko
利用自混合薄片固体激光器，以高时间分辨率捕获了悬浮在水中的布朗粒子的整体动力学过程。在给定的时间间隔内观测到的小成像场中运动的多粒子系综的净运动被发现由服从Ornstein-Uhlenbeck过程的有效介质的布朗运动来表示，其物理参数与真实的混浊介质的物理参数具有标度关系。描述了一种测量颗粒扩散常数的方法。
The overall dynamics of Brownian particles suspended in water were captured with high time resolution by using a self-mixing thin-slice solid-state laser. The net motion of an ensemble of many particles moving in the small imaging field observed at given time intervals was found to be represented by Brownian motions of an effective medium obeying the Ornstein–Uhlenbeck process, whose physical parameters have scaling relations with those of a real turbid medium. An approach toward measuring particle diffusion constants is described.