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Proceedings Paper

Polymer dynamics and fluid flow in microfabricated devices
Author(s): Olgica B. Bakajin; James P. Brody; Jeff Chou; Shirley S. Chan; Thomas A. J. Duke; James Knight; Lydia L. Sohn; Ashvin Vishwanath; Robert H. Austin; E. C. Cox
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Paper Abstract

We will discuss two recent directions of our work: (1) The influence of submicron length scales on polymer dynamics, (2) Ultra-rapid mixing via sub-micron hydrodynamic focusing. (1) Polymer dynamics at sub-micron length scales. We have explored the changes in the dynamics of long polymers as the thickness of the quasi-2 dimensional space is varied from 0.09 microns to 10 microns. We will show how the thickness of this space, scaled with the persistence length of the polymer, changes the dynamics of the polymer. The consequences of this qualitative change in polymer dynamics is quite important, since it controls the elongation of the polymer at a given force field and hence the ability of he array to fractionate the polymer. (2) Mixing at the sub- micron length scale cannot be tubulent but only diffusive in nature. We will show how it is possible using hydrodynamics to produce liquid jets of width under 20 nanometers which can mix fluids in under 1 microsecond times.

Paper Details

Date Published: 26 March 1998
PDF: 14 pages
Proc. SPIE 3258, Micro- and Nanofabricated Structures and Devices for Biomedical Environmental Applications, (26 March 1998); doi: 10.1117/12.304368
Show Author Affiliations
Olgica B. Bakajin, Princeton Univ. (United States)
James P. Brody, Univ. of Washington (United States)
Jeff Chou, Princeton Univ. (United States)
Shirley S. Chan, Princeton Univ. (United States)
Thomas A. J. Duke, Cavendish Lab. (United Kingdom)
James Knight, Princeton Univ. (United States)
Lydia L. Sohn, Princeton Univ. (United States)
Ashvin Vishwanath, Princeton Univ. (United States)
Robert H. Austin, Princeton Univ. (United States)
E. C. Cox, Princeton Univ. (United States)

Published in SPIE Proceedings Vol. 3258:
Micro- and Nanofabricated Structures and Devices for Biomedical Environmental Applications
Paul Lee Gourley, Editor(s)

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