Synthesis of Monodisperse Gold Nanoparticles Stabilized by Gemini Surfactant in Reverse Micelles

Abstract

Gold nanoparticles were prepared by the reduction of HAuCl₄ using NaBH₄ as reducing agent in a water‐in‐oil reverse micelles system, in which gemini surfactant 2‐hydroxy‐1, 3‐bis(octadecyldimethylammonium) propane dibromide (18‐3(OH)‐18) was used as stabilizer. The results of TEM and AFM show that the gold nanoparticles have a narrow size distribution. The UV‐vis absorption spectra reveal that the gemini surfactant 18-3(OH)-18 can stabilize the gold nanoparticles for at least two months.

Keywords:

• Gold nanoparticles
• gemini surfactant
• reverse micelles

Acknowledgments

This work was supported by the National Natural Science Foundation of China (20025618, 20236010) and Shanghai Municipal Education Commission of China.