Polyoxovanadate fabricated gold nanoparticles: Application in SERS.

This article reports a surface modification of gold nanoparticles with water soluble polyoxometalate, VO (decavanadate, V10). Two sizes of citrate-capped gold nanoparticles AuNP-Citrate-S (∼11nm) and AuNP-Citrate-L (∼46nm) were modified with V10 in aqueous media to form AuNP-V10-S and AuNP-V10-L, respectively. Both AuNP-V10-S and AuNP-V10-L were found to be significantly better than their citrate counterparts in strengthening Raman vibrational signals of analyte molecule.