Preparation of Silver–Gold Alloy Nanoparticles at Higher Concentration Using Sodium Dodecyl Sulfate

Angshuman Pal; Sunil Shah; Surekha Devi

doi:10.1071/CH07165

RESEARCH ARTICLE

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Preparation of Silver–Gold Alloy Nanoparticles at Higher Concentration Using Sodium Dodecyl Sulfate

Angshuman Pal ^A , Sunil Shah ^A and Surekha Devi ^A ^B

+ Author Affiliations

- Author Affiliations

^A Department of Chemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara 390002, Gujarat, India.

^B Corresponding author. Email: surekha_devi@yahoo.com

Australian Journal of Chemistry 61(1) 66-71 https://doi.org/10.1071/CH07165
Submitted: 19 May 2007 Accepted: 11 November 2007 Published: 18 January 2008

Abstract

Highly stable gold–silver alloy nanoparticles with varying mole fractions were prepared in aqueous sodium dodecyl sulfate solution by simultaneous reduction of chloroauric acid (HAuCl₄) and silver nitrate (AgNO₃) using sodium citrate. The formation of alloy nanoparticles was confirmed by UV-visible spectroscopy and transmission electron microscopy. Particle size distribution was measured by dynamic light scattering. The surface plasmon absorption band of the Au–Ag alloy nanoparticles shows linear bathochromic shift with increasing Au content. Appearance of a single absorption peak in the visible region and lack of apparent core-shell structures in the transmission electron microscope images confirm the formation of homogeneous gold–silver alloy nanoparticles.

Acknowledgement

The authors are thankful to GUJCOST (Gandhinagar, Gujarat) for financial support.

References

Preparation of Silver–Gold Alloy Nanoparticles at Higher Concentration Using Sodium Dodecyl Sulfate

Abstract

Acknowledgement

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