In situ and room-temperature synthesis of ultra-long Ag nanoparticles-decorated Ag molybdate nanowires as high-sensitivity SERS substrates

摘要: Abstract We report on room-temperature synthesis of Ag nanoparticles (NPs) decorated silver molybdate nanowires (SMNs) using a solution-based chemical reaction method. show that AgxMoyOz (Ag2Mo2O7, Ag2MoO4 and Ag6Mo10O33) nanomaterials can be selectively synthesized by altering the pH value media in presence silicotungstic acid at room temperature. This process uses isopropyl alcohol as free radical scavenger occurs over short time compared to traditional hydrothermal Moreover, we demonstrate under UV-light illumination different periods, NPs controllable distribution densities are formed situ surface SMNs tungstosilicate environment. SERS sensitivity such NP–SMN complex depends density NPs, with best structure capable detecting p-aminothiophenol concentration low 1.0 × 10−11 M. The same substrate is further used enhance Raman signal from 2-mercaptopyridine which quantitative relationship between analyte its corresponding intensity established.