TY  - JOUR
AU  - Yang, Y.
AU  - Burkhardt, T. W.
AU  - Gompper, G.
TI  - Free energy and extension of a semiflexible polymer in cylindrical confining geometries
JO  - Physical review / E
VL  - 76
IS  - 1
SN  - 1539-3755
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-57335
SP  - 011804
PY  - 2007
N1  - Record converted from VDB: 12.11.2012
AB  - We consider a long, semiflexible polymer with persistence length P and contour length L fluctuating in a narrow cylindrical channel of diameter D. In the regime D < P < L the free energy of confinement Delta F and the length of the channel R-parallel to occupied by the polymer are given by Odijk's relations Delta F/R-parallel to=A(o)k(B)TP(-1/3)D(-2/3) and R-parallel to=L[1-alpha(o)(D/P)(2/3)], where A(o) and alpha(o) are dimensionless amplitudes. Using a simulation algorithm inspired by the pruned enriched Rosenbluth method, which yields results for very long polymers, we determine A(o) and alpha(o) and the analogous amplitudes for a channel with a rectangular cross section. For a semiflexible polymer confined to the surface of a cylinder, the corresponding amplitudes are derived with an exact analytic approach. The results are relevant for interpreting experiments on biopolymers in microchannels or microfluidic devices.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000248548900086
DO  - DOI:10.1103/PhysRevE.76.011804
UR  - https://juser.fz-juelich.de/record/57335
ER  -