We consider linear and branched polymers driven through narrow and patterned channels by imposing a Poiseuille flow on the ambient solvent. We establish, by means of scaling arguments, that the translocation probability of dendrimers through the pore is independent of the number of monomers and that it takes place above a viscosity-dependent critical external current. When the channel walls are smooth, the translocation times of linear and branched polymers with the same monomer number are very similar. However, for walls that are decorated with attractive patches, dramatic differences show up: whereas a dendrimer successively docks at the patches and “walks” from one to the next, being carried away by the solvent flow, linear chains spread themselves along the channel wall without achieving translocation within simulation times. Our findings are relevant for, e.g., drug delivery through dendritic carrier molecules in capillary arterioles.
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21 August 2010
Research Article|
August 16 2010
Flow-induced polymer translocation through narrow and patterned channels
Arash Nikoubashman;
Arash Nikoubashman
a)
1Institute of Theoretical Physics,
Heinrich Heine University of Düsseldorf
, Universitätsstraße 1, D-40225 Düsseldorf, Germany
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Christos N. Likos
Christos N. Likos
b)
2Faculty of Physics,
University of Vienna
, Boltzmanngasse 5, A-1090 Vienna, Austria
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a)
Electronic mail: [email protected].
b)
Electronic mail: [email protected].
J. Chem. Phys. 133, 074901 (2010)
Article history
Received:
April 26 2010
Accepted:
June 25 2010
Citation
Arash Nikoubashman, Christos N. Likos; Flow-induced polymer translocation through narrow and patterned channels. J. Chem. Phys. 21 August 2010; 133 (7): 074901. https://doi.org/10.1063/1.3466918
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