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Gold Nanoparticles Functionalized by a Dextran-Based pH- and Temperature-Sensitive Polymer

✍ Scribed by Weipeng Lv; Shuoqi Liu; Xiaobin Fan; Shulan Wang; Guoliang Zhang; Fengbao Zhang

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
482 KB
Volume
31
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

A dextran‐based dual‐sensitive polymer is employed to endow gold nanoparticles with stability and pH‐ and temperature‐sensitivity. The dual‐sensitive polymer is prepared by RAFT polymerization of N‐isopropylacrylamide from trithiocarbonate groups linked to dextran and succinoylation of dextran after polymerization. The functionalized nanoparticles show excellent stability under various conditions and can be stored in powder‐form. UV and DLS measurements confirm that the temperature‐induced optical changes and aggregation behaviors of the particles are strongly dependent on pH.

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