Journal
MACROMOLECULES
Volume 42, Issue 10, Pages 3650-3655Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ma900184e
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Funding
- DFG [SPP 1164]
- Excellence Cluster Nano-Initiative Munich
- Elitenetzwerk Bayern in the framework of CompInt
- NSF [DMR 05-03347, DMR 07-10521]
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Using Brownian-hydrodynamic and lattice-Boltzmann simulations, we study the nonlinear response of grafted semiflexible polymers to shear flow as a function of shear rate, grafting density, and chain stiffness. Simulation results for brush height and flow stagnation layer height agree well with a mean-field theory that incorporates the interplay of hydrodynamic screening and drag-induced polymer deformation. Our predictions for the stagnation height show excellent agreement with recent experiments on the nonlinear hydrodynamic drag of DNA-grafted colloids held, in a laser trap.
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