Back to Search
Start Over
Separation of microscale chiral objects by shear flow.
- Source :
-
Physical review letters [Phys Rev Lett] 2009 Apr 17; Vol. 102 (15), pp. 158103. Date of Electronic Publication: 2009 Apr 15. - Publication Year :
- 2009
-
Abstract
- 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.
Details
- Language :
- English
- ISSN :
- 0031-9007
- Volume :
- 102
- Issue :
- 15
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 19522552
- Full Text :
- https://doi.org/10.1103/PhysRevLett.102.158103