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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 1 — Jan. 2, 2012
  • pp: 518–523

Femtosecond laser induced synthesis of Au nanoparticles mediated by chitosan

P. H. D. Ferreira, M. G. Vivas, L. De Boni, D. S. dos Santos, Jr., D. T. Balogh, L. Misoguti, and C. R. Mendonca  »View Author Affiliations

Optics Express, Vol. 20, Issue 1, pp. 518-523 (2012)

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This paper reports the synthesis of Au nanoparticles by 30-fs pulses irradiation of a sample containing HAuCl4 and chitosan, a biopolymer used as reducing agent and stabilizer. We observed that it is a multi-photon induced process, with a threshold irradiance of 3.8 × 1011 W/cm2 at 790 nm. By transmission electron microscopy we observed nanoparticles from 8 to 50 nm with distinct shapes. Infrared spectroscopy indicated that the reduction of gold and consequent production of nanoparticles is related to the fs-pulse induced oxidation of hydroxyl to carbonyl groups in chitosan.

© 2011 OSA

OCIS Codes
(190.0190) Nonlinear optics : Nonlinear optics
(320.2250) Ultrafast optics : Femtosecond phenomena
(160.4236) Materials : Nanomaterials

ToC Category:

Original Manuscript: October 3, 2011
Revised Manuscript: November 3, 2011
Manuscript Accepted: November 17, 2011
Published: December 21, 2011

P. H. D. Ferreira, M. G. Vivas, L. De Boni, D. S. dos Santos, D. T. Balogh, L. Misoguti, and C. R. Mendonca, "Femtosecond laser induced synthesis of Au nanoparticles mediated by chitosan," Opt. Express 20, 518-523 (2012)

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