"Smart" Diblock Copolymers as Templates for Magnetic-Core Gold-Shell Nanoparticle Synthesis

被引：0
|
作者：
Nash, Michael A. [1 ]
Lai, James J. [1 ]
Hoffman, Allan S. [1 ]
Yager, Paul [1 ]
Stayton, Patrick S. [1 ]
机构：
[1] Univ Washington, Dept Bioengn, Seattle, WA 98195 USA
来源：
NANO LETTERS | 2010年 / 10卷 / 01期
关键词：
RAFT polymer; localized surface plasmon resonance; core/shell nanoparticles; polymeric micelles; EDXS spectroscopy; stimuli-responsive nanoparticles; ENHANCED RAMAN-SCATTERING; THERMORESPONSIVE POLYMER; ALKYLATED POLYETHYLENIMINES; REVERSIBLE-ADDITION; ON-CHIP; TEMPERATURE; IMMUNOASSAY; SEPARATION; CHROMATOGRAPHY; BIOMOLECULES;
D O I：
10.1021/nl902865v
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We report a now strategy for synthesizing temperature-responsive gamma-Fe2O3-core/Au-shell nanoparticles (Au-mNPs) from diblock copolymer micelles. The amphiphilic diblock copolymer chains were synthesized using reversible addition-Fragmentation chain-transfer (RAFT) with a thermally responsive "smart" poly(N-isopropylacrylamide) (pNIPAAm) block and an amine-containing poly(N,N-dimethylaminoethylacrylamide) (DMAEAm) block that acted as a reducing agent during gold shell formation. The Au-mNPs reversibly aggregated upon heating the solution above the transition temperature of pNIPAAm, resulting in a red-shifted localized surface plasmon resonance.
引用
收藏
页码：85 / 91
页数：7
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