Two-stage pH response of poly(4-vinylpyridine) grafted gold nanoparticles

被引：137

作者：

Li, Dongxiang ^{[2
]}

He, Qiang ^{[1
,2
]}

Yang, Yang ^{[1
]}

Mohwald, Helmuth ^{[2
]}

Li, Junbai ^{[1
]}

机构：

[1] Chinese Acad Sci, BNLMS, Int Joint Lab, Inst Chem, Beijing 100080, Peoples R China

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

来源：

MACROMOLECULES | 2008年 / 41卷 / 19期

关键词：

D O I：

10.1021/ma800894c

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The pH response of the PVP brush grafted gold nanoparticles was investigated. The surface plasmon resonance (SPR) response showed a red shift of about 25 nm from low pH to neutral conditions. The concentrated nanocomposite suspension at pH values and neutral water and dilute basic solution to obtain the nanocomposite suspensions at different pH. PVP nanocomposites had a two-stage response to the pH change. The polymer's stimuli-responsive collapse and the nanocomposite agglomeration gave a contribution to the SPR shift in each stage. It was observed that the change of the composite nanoparticle size at different pH by the dynamic light scattering (DLS) measurements. It was also observed that the two-stage red shift of the gold SPR response is ascribed to the polymer collapse and to the particle agglomeration.

引用

页码：7254 / 7256

页数：3

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