High Sensitivity And Homogeneity Of Surface Enhanced Raman Scattering On Three-Dimensional Array-Film Hybrid Platform

We design and fabricate a substrate based on a three-dimensional array-film hybrid structure used for surface enhanced Raman scattering (SERS). This substrate exhibits improvements both in sensitivity and homogeneity for the Raman signals. As a result, the substrate increases the Raman signal of Rhodamine 6G by 12.3 times under the same measurement conditions, compared with conventional gold array sitting directly on a silica wafer. The sensitivity of SERS can be easily tuned by changing the thickness of SiO2 separation. Meanwhile, the relative standard deviations are achieved to be less than 10%. This array-film hybrid structure provides a promising approach for future SERS applications. Published by AIP Publishing.