title: Polyoxovanadate fabricated gold nanoparticles: Application in SERS.
abstract: This article reports a surface modification of gold nanoparticles with water soluble polyoxometalate, V10O286-(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. All the nanoparticles were characterized by UV-visible and Fourier transform infrared (FTIR) spectroscopies, dynamic light scattering (DLS), transmission electron microscopy (TEM) and energy dispersive X-ray (EDX) line analysis. We demonstrate that AuNP-V10-L is excellent surface-enhanced Raman scattering (SERS) substrate for a Raman-active analyte molecule at nanomolar concentrations.
authors: Department of Chemistry and Biochemistry, Kennesaw State University, Kennesaw, GA 30144-5591, United States. Electronic address: bbaruah@kennesaw.edu.
authors: Bharat
authors: B
authors: Baruah
authors: Department of Chemistry and Biochemistry, Kennesaw State University, Kennesaw, GA 30144-5591, United States.
authors: Toni-Ann
authors: TA
authors: Miller
keywords: Analyte; Gold nanoparticles; Polyoxometalate; SERS; Surface modification