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Plasmon resonance absorption in sulfide-coated gold nanorods

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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.

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  1. Indian Association for the Cultivation of Science, Kolkata, 700 032, India

    K. Chatterjee, S. Basu & D. Chakravorty

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  1. K. Chatterjee
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  2. S. Basu
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  3. D. Chakravorty
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Correspondence to D. Chakravorty.

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Chatterjee, K., Basu, S. & Chakravorty, D. Plasmon resonance absorption in sulfide-coated gold nanorods. Journal of Materials Research 21, 34–40 (2006). https://doi.org/10.1557/JMR.2006.0032

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