SERS spectra of monolayer R6G (a) and average SERS enhancement factor EF (b). (a) Monolayer R6G is absorbed on three types of 3D Ag nanostructures, with laser power 1.8 mW and the integration time 10 s. The SERS spectrum of the unpatterned Ag film was amplified 40-fold and performed with laser power 9 mW, the integration time 20 s, and the concentration of R6G 10-3 mM. (b) Average SERS enhancement factor EF as the function of the geometries.
Zhu et al. Nanoscale Research Letters 2014 9:25 doi:10.1186/1556-276X-9-25