This work demonstrates the surface alteration of gold nanoparticles (AuNPs). AuNPs synthesized using citrate as capping agent in two different sizes, AuNP-Citrate-S and AuNP-Citrate-L. The surfaces of these citrate-capped AuNPs altered with polyoxometalates V10O286− (decavanadate, V10) and Keggin structure H3PW12O40 (phosphotungstic acid, PTA) to generate AuNP-V10 and AuNP-PTA. All the nanoparticles samples characterized by UV–visible and Fourier transform infrared (FTIR) spectroscopies, transmission electron microscopy (TEM) and energy dispersive X-ray (EDX) line analysis. Both AuNP-V10 and AuNP-PTA assessed for the Surface-Enhanced Raman Scattering (SERS) substrates, and they both demonstrated superior enhancement of Raman vibrational signal of analytes at nanomolar concentrations.

Polyoxometalate capped gold nanoparticles: SERS application

2019 Spring National Meeting

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