Nanoscale flexible Ag grating/AuNPs self-assembly hybrid for ultra-sensitive sensors
Jun Dong, Yi Cao, Qingyan Han, Wei Gao, Tuo Li, Jianxia Qi
Abstract
Abstract In this paper, Au nanoparticles (AuNPs) are prepared using wet chemical reduction transfer of dense AuNPs film by self-assembly to the surface of Ag grating, which is inverted from the inner DVD after evaporation. The Ag grating/AuNPs self-assembly hybrid substrate commonly used in surface-enhanced Raman scattering (SERS) research is produced. The coupling effect between AuNP-AuNP and AuNPs-Ag slugs can evidently enhance the local electric field. Experimental results show that the hybrid SERS substrate can detect 10 −9 M Rh6G, and the enhancement factor reaches 4.4 × 10 5 . This small, cheap hybrid substrate has enormous potential in the field of SERS sensing.
Topics & Concepts
Materials scienceRaman scatteringColloidal goldSubstrate (aquarium)NanotechnologyGratingNanoscopic scaleSelf-assemblyNanoparticleEvaporationOptoelectronicsRaman spectroscopyOpticsGeologyOceanographyPhysicsThermodynamicsGold and Silver Nanoparticles Synthesis and ApplicationsPlasmonic and Surface Plasmon ResearchBiosensors and Analytical Detection