14 February 2007 Electrodeposited noble metal SERS: control of single nanoparticle size and control of array interparticle spacing
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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.
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Eoin Sheridan, Eoin Sheridan, Obianuju Inya-Agha, Obianuju Inya-Agha, Tia Keyes, 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); doi: 10.1117/12.725069; https://doi.org/10.1117/12.725069
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