Crowded, Confined, and Frustrated: Dynamics of Molecules Tethered to Nanoparticles

被引：58

作者：

Agarwal, Praveen ^{[1
]}

Kim, Sung A. ^{[1
]}

Archer, Lynden A. ^{[1
]}

机构：

[1] Cornell Univ, Ithaca, NY 14850 USA

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 25期

基金：

美国国家科学基金会;

关键词：

DIELECTRIC-RELAXATION; CIS-POLYISOPRENE; STRESS-RELAXATION; POLYMER-CHAIN; SPECTROSCOPY; NANOCOMPOSITES; REPTATION; BEHAVIOR;

D O I：

10.1103/PhysRevLett.109.258301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Above a critical chemistry-dependent molecular weight, all polymer molecules entangle and, as a result, exhibit slow dynamics, enhanced viscosity, and elasticity. Herein we report on the dynamics of low molecular weight polymers tethered to nanoparticles and find that even conventionally unentangled chains manifest dynamical features similar to entangled, long-chain molecules. Our findings are shown to imply that crowding and confinement of polymers on particles produce topological constraints analogous to those in entangled systems. DOI: 10.1103/PhysRevLett.109.258301

引用

页数：4

共 34 条

[1] DIELECTRIC NORMAL-MODE RELAXATION [J].