Published July 7, 2006
| Published
Journal Article
Open
Molecular Sieving in Periodic Free-Energy Landscapes Created by Patterned Nanofilter Arrays
- Creators
- Fu, Jianping
- Yoo, Juhwan
- Han, Jongyoon
Chicago
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Abstract
We present an experimental study of Ogston-like sieving process of rodlike DNA in patterned periodic nanofluidic filter arrays. The electrophoretic motion of DNA through the array is described as a biased Brownian motion overcoming periodically modulated free-energy landscape. A kinetic model, constructed based on the equilibrium partitioning theory and the Kramers theory, explains the field-dependent mobility well. We further show experimental evidence of the crossover from Ogston-like sieving to entropic trapping, depending on the ratio between nanofilter constriction size and DNA size.
Additional Information
© 2006 The American Physical Society (Received 22 December 2005; published 7 July 2006) We acknowledge support from NSF (No. CTS-0347348), NIH (No. EB005743), and Singapore-MIT Alliance (SMA-II, CE program). J.Y. was supported by the Caltech Summer Undergraduate Research Program. We thank P. Mao for helping take the SEM images.Attached Files
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Additional details
- Eprint ID
- 4898
- Resolver ID
- CaltechAUTHORS:FUJprl06
- NSF
- CTS-0347348
- NIH
- EB005743
- Singapore-MIT Alliance for Research and Technology (SMART)
- Caltech Summer Undergraduate Research Fellowship (SURF)
- Created
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2006-09-12Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field