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Article

Enhanced Stability of Gold Colloids Produced by Femtosecond Laser Synthesis in Aqueous Solution of CTAB

Supporting Info

Mushtaq A. Sobhan*†, Michael J. Withford†‡ and Ewa M. Goldys†

^† MQ Photonics Research Centre

^‡ Centre for Ultrahigh Bandwidth Devices for Optical Systems (CUDOS)

Department of Physics & Engineering, Macquarie University, NSW, Sydney 2109, Australia

Langmuir, Article ASAP

DOI: 10.1021/la903088e

Publication Date (Web): November 16, 2009

*Corresponding author. E-mail: msobhan@ics.mq.edu.au. Telephone: +61 02 9850 6598. Fax: +61 02 9850 8115.

Abstract

Femtosecond laser ablation of gold in an aqueous solution of cetyl trimethylammonium bromide (CTAB) is shown to produce nanoparticle suspensions with superior colloidal stability compared to other surfactants, with shelf lives exceeding 2 months even at low concentrations of CTAB, below 1 mM. CTAB also helps control nanoparticle size with mean diameters of 6.3, 5.6, and 4.7 nm obtained in 0.1, 0.5, and 1 mM concentrations of CTAB respectively, compared to 11.9 nm obtained in pure deionized water under same ablation conditions. The size distributions produced with low concentrations of CTAB are comparable to those produced by other surfactants, typically used at high concentrations.

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History

Received: August 18, 2009
Revised: October 12, 2009

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Article

Enhanced Stability of Gold Colloids Produced by Femtosecond Laser Synthesis in Aqueous Solution of CTAB

Abstract

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History

Recommend & Share

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Ligand Exchange Approach in Deriving Magnetic−Fluorescent and Magnetic−Plasmonic Hybrid Nanoparticle

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