Dynamics of Probe Diffusion in Rod Solutions

by: Victor Pryamitsyn, Venkat Ganesan

Physical Review Letters, Vol. 100, No. 12. (2008)

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Abstract

Applications of probe diffusion in polymer matrices typically envision that for particles sizes (R) larger than the correlation length of the polymer solution (), the probe (at long times) diffuses as in a continuum polymer solution. We present simulation results for probe diffusion in rod solutions which challenge this conventional wisdom and indicate a new mechanism of a probe diffusion operative for R>. Our simulation results are rationalized by scaling arguments invoking a novel mechanism of the constraint release motion of the rods, and suggest that the dynamical characteristics of the polymer matrix also proves important in developing a complete description of the probe motion.

@article{citeulike:2763281, abstract = {Applications of probe diffusion in polymer matrices typically envision that for particles sizes (R) larger than the correlation length of the polymer solution (), the probe (at long times) diffuses as in a continuum polymer solution. We present simulation results for probe diffusion in rod solutions which challenge this conventional wisdom and indicate a new mechanism of a probe diffusion operative for R\>. Our simulation results are rationalized by scaling arguments invoking a novel mechanism of the constraint release motion of the rods, and suggest that the dynamical characteristics of the polymer matrix also proves important in developing a complete description of the probe motion.}, author = {Pryamitsyn, Victor and Ganesan, Venkat }, citeulike-article-id = {2763281}, doi = {10.1103/PhysRevLett.100.128302}, journal = {Physical Review Letters}, keywords = {diffusion, dynamics, rod, tracer}, number = {12}, posted-at = {2008-05-07 01:56:13}, priority = {2}, publisher = {APS}, title = {Dynamics of Probe Diffusion in Rod Solutions}, url = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal\&id=PRLTAO000100000012128302000001\&idtype=cvips\&gifs=yes}, volume = {100}, year = {2008} }

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TY - JOUR ID - citeulike:2763281 L3 - citeulike-article-id:2763281 TI - Dynamics of Probe Diffusion in Rod Solutions JF - Physical Review Letters VL - 100 IS - 12 PB - APS N2 - Applications of probe diffusion in polymer matrices typically envision that for particles sizes (R) larger than the correlation length of the polymer solution (), the probe (at long times) diffuses as in a continuum polymer solution. We present simulation results for probe diffusion in rod solutions which challenge this conventional wisdom and indicate a new mechanism of a probe diffusion operative for R>. Our simulation results are rationalized by scaling arguments invoking a novel mechanism of the constraint release motion of the rods, and suggest that the dynamical characteristics of the polymer matrix also proves important in developing a complete description of the probe motion. KW - diffusion KW - dynamics KW - rod KW - tracer AU - Pryamitsyn, Victor AU - Ganesan, Venkat PY - 2008/// UR - http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000100000012128302000001&idtype=cvips&gifs=yes ER -

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