Thermosensitive copolymer networks modify gold nanoparticles for nanocomposite entrapment

被引：128

作者：

Li, Dongxiang

He, Qiang

Cui, Yue

Wang, Kewei

Zhang, Xiaoming

Li, Junbai ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Int Joint Lab,CAS Key Lab Colloid & Interface Sci, Beijing 100080, Peoples R China

[2] Max Planck Inst Colloids & Interfaces, D-14476 Golm, Germany

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2007年 / 13卷 / 08期

关键词：

copolymerization; encapsulation; gold; nanoparticles; thermosensitivity;

D O I：

10.1002/chem.200600839

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The core-shell gold nanoparticles and copolymer of N-isopropylacrylamide (NIPAM) and N,N'-methylenebisacrylamide (MBAA) hybrids (Au@copolymer) were fabricated through surface-initiated atom-transfer radical polymerization (ATRP) on the surface of gold nanoparticles in 2-propanol/water mixed solvents. The surface of citrate-stabilized gold nanoparticles was first modified by a disulfide initiator ATRP. The slight cross-linking polymerization between NIPAM and MBAA occurred on the gold surface and resulted in the formation of core-shell Au@copolymer nanostructures that were characterized by TEM, and FTIR and UV-visible spectroscopy. Such synthesized Au@copolymer hybrids possess clearly thermosensitive properties and exhibit "inspire" and "expire" water behavior in response to temperature changes in aqueous solution. Because of this property, we enable to trap and encapsulate smaller nanoparticles by using the free space of the copolymer-network scaffold anchored at the gold surface.

引用

页码：2224 / 2229

页数：6

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