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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 2, Iss. 2 — Feb. 1, 2012
  • pp: 161–172

Laser-assisted synthesis of Au-Ag alloy nanoparticles with tunable surface plasmon resonance frequency

R. Kuladeep, L. Jyothi, K. Shadak Alee, K. L. N. Deepak, and D. Narayana Rao  »View Author Affiliations


Optical Materials Express, Vol. 2, Issue 2, pp. 161-172 (2012)
http://dx.doi.org/10.1364/OME.2.000161


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Abstract

Here we present our experimental results in synthesizing Au-Ag bimetallic nanoalloys with tunable localized surface plasmon resonance frequency through nanosecond laser-induced heating in the presence of polyvinyl alcohol as a reducing and capping agent via three different procedures: (i) Mixture of HAuCl4 and AgNO3 precursors, (ii) Mixture of Au nanoparticles (NPs) and AgNO3 precursor and (iii) Mixture of both Au and Ag NPs. Presence of single absorption band and direct dependence of the Au/Ag molar ratio to the shift of the absorption peak and lack of core-shell structure in Transmission Electron Microscope images confirms that the formed NPs are homogeneous alloys.

© 2012 OSA

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(300.6550) Spectroscopy : Spectroscopy, visible
(160.4236) Materials : Nanomaterials

ToC Category:
Plasmonics

History
Original Manuscript: November 7, 2011
Revised Manuscript: December 9, 2011
Manuscript Accepted: December 31, 2011
Published: January 11, 2012

Citation
R. Kuladeep, L. Jyothi, K. Shadak Alee, K. L. N. Deepak, and D. Narayana Rao, "Laser-assisted synthesis of Au-Ag alloy nanoparticles with tunable surface plasmon resonance frequency," Opt. Mater. Express 2, 161-172 (2012)
http://www.opticsinfobase.org/ome/abstract.cfm?URI=ome-2-2-161


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