A gold nanocomposite made soluble in both water and oil by the addition of a second adsorption layer of poly-N-vinyl-2-pyrrolidone on gold nanoparticles that have been made hydrophobic

被引：21

作者：

Yang, Y

Li, JR

Mu, J

Rong, HL

Jiang, L ^{[1
]}

机构：

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

[2] E China Univ Sci & Technol, Sch Chem & Pharamceut, Shanghai 200237, Peoples R China

来源：

NANOTECHNOLOGY | 2006年 / 17卷 / 02期

关键词：

D O I：

10.1088/0957-4484/17/2/020

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A kind of nanocomposite with hydrophobic nanogold as the core and an absorption layer of poly-N-vinyl-2-pyrrolidone (PVP) molecules surrounding it has been prepared. The nanocomposite can be dispersed well in both water and organic solvent. In water media it disperses over a pH range from I to 14, while in organic media the desorption of PVP results in the nanoparticles becoming hydrophobic; the enhancement of the viscosity caused by the PVP solution causes the hydrophobic sol to have very good kinetic stability. The particles can be switched repeatedly between hydrophobic and hydrophilic states. Transmission electron microscopy, Fourier transform infrared spectroscopy and energy dispersive x-ray analysis have been used to study the multilayer protection mechanism.

引用

页码：461 / 465

页数：5

共 43 条

[1] Metal-nanoparticle single-electron transistors fabricated using electromigration [J].