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RESEARCH PRODUCT
Anomalous Diffusion and Relaxation of Collapsed Polymer Chains
Kurt BinderA. MilchevA. Milchevsubject
chemistry.chemical_classificationQuantitative Biology::BiomoleculesMaterials scienceCondensed matter physicsAnomalous diffusionMonte Carlo methodGeneral Physics and AstronomyPolymerCondensed Matter::Soft Condensed Matterchemistry.chemical_compoundMonomerchemistryExponentRelaxation (physics)Anomaly (physics)Scalingdescription
Time-dependent displacement of monomers and the centre-of-gravity motion of a polymer chain at various temperatures below the theta-temperature are studied by Monte Carlo simulation of an off-lattice model. While inner monomers diffuse Rouse-like, [ri(t) − ri(0)]2 t1/2, the centre of mass exhibits pronounced anomalous diffusion, [rc.m.(t) − rc.m.(0)]2 ta, where the exponent a seems to depend on temperature. The resulting anomalous dependence of the relaxation times on chain length is discussed in terms of scaling ideas. A possible relation to a glasslike freezing in of the collapsed globules is pointed out.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1994-06-20 | Europhysics Letters (EPL) |