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

Eoin Sheridan; Obianuju Inya-Agha; Tia Keyes

doi:10.1117/12.725069

14 February 2007 Electrodeposited noble metal SERS: control of single nanoparticle size and control of array interparticle spacing

Eoin Sheridan, Obianuju Inya-Agha, Tia Keyes

Author Affiliations +

Proceedings Volume 6450, Plasmonics in Biology and Medicine IV; 64500U (2007) https://doi.org/10.1117/12.725069
Event: SPIE BiOS, 2007, San Jose, California, United States

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.

Citation Download Citation

Eoin Sheridan, Obianuju Inya-Agha, and Tia Keyes "Electrodeposited noble metal SERS: control of single nanoparticle size and control of array interparticle spacing", Proc. SPIE 6450, Plasmonics in Biology and Medicine IV, 64500U (14 February 2007); https://doi.org/10.1117/12.725069

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