Chain Structures of Microparticles Induced by Focusing a Laser Beam near the Liquid‐Air Interface of a Droplet

IF 0.5 Q4 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Complex Systems Pub Date : 2008-02-27 DOI:10.1063/1.2897886
H. Adachi, K. Miyakawa
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Abstract

We investigate optically induced dynamics of micron‐sized particles by focusing a laser beam near the liquid‐air interface of a suspension droplet. We find three distinct regimes in behaviors of particles depending on the contact angle of the droplet: convection, linear flow and formation of a closed‐packed array. These behaviors are governed by the most dominant of effects arising from a focused laser beam, such as local heating and radiation pressure. We find that micron‐sized polystyrene beads can be assembled into a chain structure by taking advantage of linear flows. This novel method is applicable to the formation of a chain of carbon nanotubes, non‐transparent objects which are difficult to trap.
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在液滴液-气界面附近聚焦激光束诱导的微粒链结构
我们通过将激光束聚焦在悬浮液滴的液-气界面附近来研究微米级粒子的光诱导动力学。根据液滴的接触角,我们发现粒子的行为有三种不同的形式:对流、线性流动和封闭排列的形成。这些行为是由聚焦激光束产生的最主要的效应所控制的,例如局部加热和辐射压力。我们发现微米级的聚苯乙烯珠可以利用线性流动的优势组装成链状结构。这种新方法适用于碳纳米管链的形成,碳纳米管是一种难以捕获的非透明物体。
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来源期刊
Complex Systems
Complex Systems MATHEMATICS, INTERDISCIPLINARY APPLICATIONS-
CiteScore
1.80
自引率
25.00%
发文量
18
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