An ultrasensitive method: surface-enhanced Raman scattering of Ag nanoparticles from β-silver vanadate and copper

Abstract

Ultrasensitive surface-enhanced Raman scattering signals of four typical analytes were observed on Ag nanoparticles from β-silver vanadate and copper, even though the concentrations of these analytes were as low as 1 × 10⁻¹⁶ M (Rhodamine 6G or crystal violet) and 1 × 10⁻¹⁵ M (trinitrotoluene or bovine serum albumin).