Single polymer chain rubber elasticity investigated by atomic force microscopy

被引：41

作者：

Nakajima, K ^{[1
]}

Watabe, H ^{[1
]}

Nishi, T ^{[1
]}

机构：

[1] Tokyo Inst Technol, Grad Sch Sci & Engn, Dept Organ & Polymer Mat, Meguro Ku, Tokyo 1528552, Japan

来源：

POLYMER | 2006年 / 47卷 / 07期

关键词：

atomic force microscopy; entropic elasticity; virial coefficient;

D O I：

10.1016/j.polymer.2005.12.092

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A method, which is called as 'nanofishing', enabled us to stretch a single polymer chain adsorbed on an Au(111) substrate with picking it at its two thiol-modified termini using atomic force microscope equipped with a gold-coated probe. A force-extension curve obtained for a single polystyrene chain in a Theta solvent (cyclohexane) showed a good agreement with a so-called worm-like chain model, and thus gave microscopic information about entropic elasticity. Solvent effects on the statistical properties of single polymer chains were also investigated. For example, the second virial coefficient in cyclohexane was determined at a single polymer basis, which was almost comparable with a simple Flory's lattice model. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：2505 / 2510

页数：6

共 31 条

[1] Study of the polydispersity of grafted poly(dimethylsiloxane) surfaces using single-molecule atomic force microscopy [J].