Convective Depletion During The Fast Propagation Of A Nanosphere Through A Polymer Solution

Details Convective Depletion During The Fast Propagation Of A Nanosphere Through A Polymer Solution Convective Depletion During The Fast Propagation Of A Nanosphere Through A Polymer Solution

2003-12-08

arxiv.org/abs/cond-mat/0312192v2

Physics

Condensed Matter

Soft Condensed Matter

12 pages, 2 figures

Scientific paper

10.1016/j.physa.2004.01.066

A theory of nonlinear convective depletion is set up as a nanosphere translates fast through a semidilute polymer solution. For nanospheres a self-consistent field theory in the Rouse approximation is often legitimate. A self-similar solution of the convective depletion equation is argued to be feasible at high velocities. The nature of the thin boundary layer in front of the propagating particle is analyzed. One example of convective depletion is when a charged protein moves through a semidilute polymer under the influence of a high electric field. The protein velocity is then proportional to the fifth power of the field. The theory could be useful in interpreting the separation of protein mixtures by microchip electrophoresis.

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