Phase transfer of surface-modified gold nanoparticles by hydrophobization with alkylamines

被引：115

作者：

Mayya, KS

Caruso, F ^{[1
]}

机构：

[1] Univ Melbourne, Dept Chem & Biomol Engn, Melbourne, Vic 3010, Australia

[2] Max Planck Inst Colloids & Interfaces, D-14424 Potsdam, Germany

来源：

LANGMUIR | 2003年 / 19卷 / 17期

关键词：

D O I：

10.1021/la034018+

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The complete transfer from an aqueous to an organic solution of negatively charged carboxylate- and sulfonate-modified gold nanoparticles in the presence of primary amines is demonstrated. The transfer of carboxylate-modified gold nanoparticles to chloroform was found to be dependent on the pH of the aqueous phase. The sulfonate-modified gold nanoparticles readily transferred to chloroform in the presence of sodium chloride. Fourier transform infrared measurements showed that the transfer of particles occurred via acid-base pair formation between the carboxylate or sulfonate moieties on the nanoparticles and the protonated amine groups of the alkylamines. The transfer of the gold nanoparticles to the organic phase occurred under similar conditions for alkylamines with C-12 and C-18 chain lengths. Transmission electron microscopy studies showed that the phase-transferred gold nanoparticles arranged into ordered arrays upon evaporation of the organic solvent.

引用

页码：6987 / 6993

页数：7

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