INIFTA   05425
INSTITUTO DE INVESTIGACIONES FISICO-QUIMICAS TEORICAS Y APLICADAS
Unidad Ejecutora - UE
artículos
Título:
Unexpected crossover dynamics of single polymer in a corrugated tube
Autor/es:
A. DE VIRGILIIS; D. MUKHERJI
Revista:
Macro LETTERS
Editorial:
ACS
Referencias:
Año: 2011 p. 1 - 1
ISSN:
2161-1653
Resumen:
We present a molecular dynamics study of a generic, coarse-grained model for single-polymer diffusion confined in a cylinder, which has variable atomic-scale roughness. Inherent structure of the cylinder is similar to that of a carbon nano-tube. For narrow tube, i.e., radius of cylinder comparable to the size of the monomer, the axial diffusion coefficient D|| scales as D|| ∝ N −3/2 , with chain length N , upto N ≈ 100 then crosses over to Rouse scaling for the larger N values. This strongly correlated dynamics is reminiscent of single file diffusion in a narrow channel.