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Plasmon resonance absorption in sulfide-coated gold nanorods

Published online by Cambridge University Press:  01 January 2006

K. Chatterjee ,
S. Basu  and
D. Chakravorty
K. Chatterjee
Affiliation:
Indian Association for the Cultivation of Science, Kolkata 700 032, India
S. Basu
Affiliation:
Indian Association for the Cultivation of Science, Kolkata 700 032, India
D. Chakravorty*
Affiliation:
Indian Association for the Cultivation of Science, Kolkata 700 032, India
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Gold nanorods 100 nm in diameter were grown within polycarbonate membranes as templates by the electrodeposition technique. A low-temperature sulfidation process was used to make gold sulfide nanoshells around the nanorods with a thickness of ∼7 nm. Optical absorption measurements were carried out on sulfide-coated gold nanorods obtained by dissolving the polycarbonate membrane. Several peaks were observed. These were analyzed on the basis of longitudinal and transverse modes of gold nanorods, the core–shell structure of gold–gold sulfide, and the presence of nanoparticles of gold. Theoretical analysis was carried out using a modified Mie scattering formalism. Satisfactory agreement between experimental results and theoretical fits were obtained.

Keywords

ElectrodepositionNanoscaleOptical properties
Type
Articles
Information
Journal of Materials Research , Volume 21 , Issue 1 , January 2006 , pp. 34 - 40
Copyright
Copyright © Materials Research Society 2006

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