Force Required to Disassemble Block Copolymer Micelles in Water

被引：13
|
作者：
Yu, Ying [1 ]
Wu, Guanglu [1 ]
Liu, Kai [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 | 2010年 / 26卷 / 12期
关键词：
SINGLE-MOLECULE; SPECTROSCOPY REVEALS; MECHANICAL STABILITY; AFM; ADHESION; PROTEINS; POLYMERS; STRENGTH; BOND;
D O I：
10.1021/la101235e
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The force required to disassemble block copolymer micelles in water has been directly investigated via atomic force microscopy-based single-molecule force spectroscopy. The force needed to disassemble block copolymer micelles of poly(acrylic acid)-polyfluorene-poly(acrylic acid) in water is found to be 23 pN. The force increases as the stretching velocity increases, indicating that micelle disassembly is a dynamic process. In addition, the disassembly force is sensitive to the properties of the solvents. This study represents the first attempt to employ single-molecule force spectroscopy to directly measure the force needed to disassemble block copolymer micelles in water.
引用
收藏
页码：9183 / 9186
页数：4
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