Fabrication of gold nanoparticles in water by laser ablation technique and their characterization

A. F.M.Y. Haider*, S. Sengupta, K. M. Abedin, Aminul I. Talukder

*Corresponding author for this work

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

A colloidal solution of gold nanoparticles in deionized nanopure water was produced by laser ablation technique without the use of any chemical/surfactant. Spectral characterization and morphological studies of these nanoparticles were carried out by UV-Vis Spectroscopy and Scanning Electron Microscopy, respectively. A number of variables of the ablating laser pulse have been used to control the size of the fabricated nanoparticles. Excellent correlation between ablating laser pulse parameter and optical and morphological parameters of the gold colloids were obtained. The peak of the extinction spectra shows a monotonic blue shift for laser fluence of 410 J/cm 2 and above. Below this the extinction peak remains fairly constant in wavelength. Blue shifts of the extinction spectra were also observed with increasing re-ablation time of previously ablated gold colloids. Possible explanations of all these observations are discussed.

Original languageEnglish
Pages (from-to)487-495
Number of pages9
JournalApplied Physics A: Materials Science and Processing
Volume105
Issue number2
DOIs
Publication statusPublished - Nov 2011

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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