Forces Acting on a Single Particle in an Evaporating Sessile Droplet on a Hydrophilic Surface
Forces Acting on a Single Particle in an Evaporating Sessile Droplet on a Hydrophilic Surface
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DOI：
10.1021/ac902288z
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发表时间：
2010-02-01
影响因子：
7.4
通讯作者：
Kang, Yong Tae
中科院分区：
文献类型：
--
作者：
Jung, Jung-yeul;Kim, Young Won;Kang, Yong Tae
The evaporating sessile droplet of a mono/didisperse colloid on a plate is a very useful and handy technique in micro/nano/bioapplications to separate, pattern, and control the particles. Although the fundamental nature of the evaporation phenomena and its applications have been extensively proposed, the crucial forces affecting a single particle motion in an evaporating droplet are not reported yet. To elucidate the impact of various forces including the drag, electrostatic, van der Waals, and surface tension forces on the particle motion in suspension, the magnitudes of them are compared using the scale analysis. In the early stage of the evaporation, in which the contact line is fixed, the motion of a single particle suspended in liquid are mostly affected by drag force. Later, with the incidence of the contact line recession, the surface tension force takes over the control of the single particle motion.
