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SERS Study of Alizarin Red Dye on Colloidal Silver Nanoparticles

Published online by Cambridge University Press:  31 January 2011

Raj Kumar Swarnkar
Affiliation:
rk_swarnkar85@rediffmail.comrk_swarnkar85@rediffmail.com
Subhash Chandra Singh
Affiliation:
subhash_laserlab@yahoo.co.in, University of Allahabad, Physics, Allahabad, India
Ram Gopal
Affiliation:
spectra2@rediffmail.com, University of Allahabad, Physics, Allahabad, India
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Abstract

The present paper deals with surface enhanced Raman scattering (SERS) study of an organic dye Alizarin Red on colloidal silver nanoparticles. The colloidal solution of nanoparticles is synthesized by pulsed laser ablation of silver rod in pure deionized water using focused out put of 1064nm wavelength of Nd:YAG laser having 35mJ/ pulse energy. Sodium chloride is used as aggregating agents. It is observed that SERS enhancement factor varies strongly depending on concentration of used aggregating agent (especially on the concentration of Cl- ions). These changes in SERS efficiency of colloid are reflected through changes on the absorption spectra. The possible mechanism of SERS is also discussed.

Type
Research Article
Copyright
Copyright © Materials Research Society 2010

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References

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