Nanoscale flexible Ag grating/AuNPs self-assembly hybrid for ultra-sensitive sensors

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 x 10(5). This small, cheap hybrid substrate has enormous potential in the field of SERS sensing.

Automated summary

This paper investigates a novel hybrid SERS substrate prepared by self-assembling Au nanoparticles onto the surface of an Ag grating, enabling sensitive detection of Rh6G. Experimental results demonstrate that this hybrid substrate can significantly enhance the local electric field, with potential applications in the field of SERS sensing.