Alignment and self-assembly of elongated micronsize rods in several flow fields

Content Provider	Semantic Scholar
Author	Katz, Emanuel Yarin, Alexander L. Salalha, Wael Zussman, Eyal
Copyright Year	2006
Abstract	Microfluidic alignment has attracted attention as a possible tool for the orientation of micronsize rods suspended in a solvent and the deposition of these rods in ordered arrays on solid surfaces. In the present work the following situations are realized experimentally: i a flow through an abruptly converging or diverging joint between wide and narrow straight channels which entrains and aligns or misaligns microrods and ii a tiny droplet of the order of a hundred microns that contains microrods is displaced due to Marangoni convection forces in a channel subjected to a temperature gradient. The flow near the advancing contact line orients the random suspension of rods and guides them towards the channel bottom where they are deposited in an ordered array. In parallel with this experimental study, the processes of microrod reorientation and alignment in the above-mentioned flows and in a similar sinklike flow into an issuing jet were studied using solutions of the Fokker-Planck equation for the orientation probability density function. © 2006 American Institute of Physics. DOI: 10.1063/1.2206090
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Alternate Webpage(s)	http://diyhpl.us/~bryan/papers2/2009-03-12/Alignment%20and%20self-assembly%20of%20elongated%20micronsize%20rods%20in%20several%20flow%20fields.pdf
Language	English
Access Restriction	Open
Subject Keyword	Alignment AngularJS Aspect Ratio Convection Convergence (action) Digital Object Identifier Experiment Flow Gradient Micron Order (action) Physical vapor deposition Probability Density Rod Photoreceptors Self-assembly Solutions Suspension substance
Content Type	Text
Resource Type	Article