Single-Molecule Force Spectroscopy of Selenium-Containing Amphiphilic Block Copolymer: Toward Disassembling the Polymer Micelles

被引：49
|
作者：
Tan, Xinxin [1 ]
Yu, Ying [1 ]
Liu, Kai [1 ]
Xu, Huaping [1 ]
Liu, Dongsheng [1 ]
Wang, Zhiqiang [1 ]
Zhang, Xi [1 ]
机构：
[1] Tsinghua Univ, Dept Chem, Key Lab Organ Optoelect & Mol Engn, Beijing 100084, Peoples R China
来源：
LANGMUIR | 2012年 / 28卷 / 25期
关键词：
INTERMOLECULAR INTERACTIONS; AFM; MICROSCOPY; LEVEL; WATER; MECHANICS; PROTEIN; CHAINS; PYRENE; DNA;
D O I：
10.1021/la301703t
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Selenium-containing polymers are a new type of responsive polymer material. Here, a selenium-containing amphiphilic block copolymer (PEG-PUSe-PEG) has been investigated using atomic force microscopy (AFM)-based single-molecule force spectroscopy (SMFS). The deviation between force-extension curves of PEG-PUSe-PEG in water and in DMSO is found to be related to the disassembly of the micellar structures in water. SMFS experiments on PEG-PUSeox-PEG suggest that the change from selenide to oxidized selenone contributes significantly to the change in amphiphilicity, without obviously influencing the single-chain elasticity.
引用
收藏
页码：9601 / 9605
页数：5
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