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Proceedings Paper

Electrodeposited noble metal SERS: control of single nanoparticle size and control of array interparticle spacing
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Paper Abstract

Gold and silver nanoparticles have been electrodeposited onto fluorine-doped tin oxide by a two pulse method. The statistical distribution of the size and interparticle spacing of nanoparticles can be controlled by altering the overpotential and duration of the nucleation and growth pulses. Isolated gold and silver nanoparticle covered surfaces prepared in this way display a localized surface plasmon absorption. Raman spectra for immobilized trans-1,2-bis(4- pyridyl) ethylene have been recorded from isolated gold and silver nanoparticle surfaces with different mean particle size, and at different excitation wavelengths. The optimal SERS conditions determined for isolated gold and for silver nanoparticles produce enhancement factors of 5.6 x 102 and 4.0 x 103 , respectively. Reproducibility is typically 20- 30% RSD due to variations in the SERS active area exposed in different measurements and perhaps variations in the enhancement factor at different sites on a single electrodeposited surface.

Paper Details

Date Published: 14 February 2007
PDF: 12 pages
Proc. SPIE 6450, Plasmonics in Biology and Medicine IV, 64500U (14 February 2007); doi: 10.1117/12.725069
Show Author Affiliations
Eoin Sheridan, Dublin City Univ. (Ireland)
Obianuju Inya-Agha, Dublin City Univ. (Ireland)
Tia Keyes, Dublin City Univ. (Ireland)

Published in SPIE Proceedings Vol. 6450:
Plasmonics in Biology and Medicine IV
Tuan Vo-Dinh; Joseph R. Lakowicz, Editor(s)

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