Force spectroscopy study on poly(acrylamide) derivatives: Effects of substitutes and buffers on single-chain elasticity

被引：59

作者：

Wang, C

Shi, WQ

Zhang, WK

Zhang, X ^{[1
]}

Katsumoto, Y

Ozaki, Y

机构：

[1] Jilin Univ, Coll Chem, Key Lab Supramol Struct & Mat, Changchun 130023, Peoples R China

[2] Kwansei Gakuin Univ, Sch Sci & Technol, Dept Chem, Sanda 6691337, Japan

来源：

NANO LETTERS | 2002年 / 2卷 / 10期

关键词：

D O I：

10.1021/nl0256917

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Single-chain elasticity of two important poly(acrylamide) derivatives, poly(N,N'-dimethylacrylamide) (PDMA) and poly(N,N'-diethylacrylamide) (PDEA), was investigated by an atomic force microscopy (AFM)-based single molecule force spectroscopy (SMFS). SMFS revealed that the single chain of PDEA was stiffer than that of PDMA due to different bulky substitutes. It was also found from the SMFS study that the elasticity of PDMA and PDEA was enhanced in urea buffer solutions, probably due to hydrogen-bond interactions between urea molecules and the side groups of poly(acrylamide) derivatives.

引用

页码：1169 / 1172

页数：4