6533b827fe1ef96bd1285d2a
RESEARCH PRODUCT
Breakdown of the Kratky-Porod Wormlike Chain Model for Semiflexible Polymers in Two Dimensions
Hsiao-ping HsuWolfgang PaulKurt Bindersubject
Persistence lengthchemistry.chemical_classificationPhysicsQuantitative Biology::BiomoleculesChain modelGaussianMonte Carlo methodCrossoverGeneral Physics and AstronomyFOS: Physical sciencesPolymerCondensed Matter - Soft Condensed MatterRodCondensed Matter::Soft Condensed Mattersymbols.namesakechemistrysymbolsSoft Condensed Matter (cond-mat.soft)Statistical physicsStandard model (cryptography)description
By large-scale Monte Carlo simulations of semiflexible polymers in $d=2$ dimensions the applicability of the Kratky-Porod model is tested. This model is widely used as "standard model" for describing conformations and force versus extension curves of stiff polymers. It is shown that semiflexible polymers in $d=2$ show a crossover from hard rods to self-avoiding walks, the intermediate Gaussian regime (implied by the Kratky-Porod model) is completely absent. Hence the latter can also describe force versus extension curves only if the contour length is only a few times larger than the persistence length. Consequences for experiments on biopolymers at interfaces are briefly discussed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-11-14 |