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Anomalous dynamics of unbiased polymer translocation through a narrow pore
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Panja, Debabrata, Barkema, Gerard T. and Ball, Robin (2007) Anomalous dynamics of unbiased polymer translocation through a narrow pore. Journal of Physics: Condensed Matter, Vol.19 (No.43). doi:10.1088/0953-8984/19/43/432202 ISSN 0953-8984.
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Official URL: http://dx.doi.org/10.1088/0953-8984/19/43/432202
Abstract
We consider a polymer of length N translocating through a narrow pore in the absence of external fields. The characterization of its purportedly anomalous dynamics has so far remained incomplete. We show that the polymer dynamics is anomalous up to the Rouse time tau(R) similar to N1+2 nu ., with a mean square displacement through the pore consistent with t((1+nu)/( 1+ 2 nu)), with nu approximate to 0.588 the Flory exponent. This is shown to be directly related to a decay over time of the excess monomer density near the pore as t(-(1+nu)/(1+2 nu)) exp(-t/tau(R)). Beyond the Rouse time, translocation becomes diffusive. In consequence of this, the dwell time tau(d), the time a translocating polymer typically spends within the pore, scales as N2+nu, in contrast to previous claims.
| Item Type: | Journal Article | ||||
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| Subjects: | Q Science > QA Mathematics Q Science > QP Physiology |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Library of Congress Subject Headings (LCSH): | Polymers -- Physiological transport -- Mathematical models | ||||
| Journal or Publication Title: | Journal of Physics: Condensed Matter | ||||
| Publisher: | IOP Publishing Ltd | ||||
| ISSN: | 0953-8984 | ||||
| Official Date: | 2007 | ||||
| Dates: |
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| Volume: | Vol.19 | ||||
| Number: | No.43 | ||||
| Number of Pages: | 8 | ||||
| DOI: | 10.1088/0953-8984/19/43/432202 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||
| Date of first compliant deposit: | 14 December 2015 | ||||
| Date of first compliant Open Access: | 14 December 2015 |
Data sourced from Thomson Reuters' Web of Knowledge
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