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|a Powers, Thomas R.
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|a Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
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|a Massachusetts Institute of Technology. Department of Mechanical Engineering
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|a Stocker, Roman
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|a Marcos
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|a Stocker, Roman
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|a Fu, Henry C.
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|a Stocker, Roman
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|a Marcos
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|a Separation of Microscale Chiral Objects by Shear Flow
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|b American Physical Society,
|c 2010-02-23T20:25:13Z.
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|z Get fulltext
|u http://hdl.handle.net/1721.1/51794
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|a We show that plane parabolic flow in a microfluidic channel causes nonmotile, helically shaped bacteria to drift perpendicular to the shear plane. Net drift results from the preferential alignment of helices with streamlines, with a direction that depends on the chirality of the helix and the sign of the shear rate. The drift is in good agreement with a model based on resistive force theory, and separation is efficient (>80%) and fast (<2 s). We estimate the effect of Brownian rotational diffusion on chiral separation and show how this method can be extended to separate chiral molecules.
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|a en_US
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|a Article
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|t Physical Review Letters
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