SERS spectra of R6G adsorbed on fabricated needle-like Ag nanostructures (RTS, NS, and SWS structures). A flat Ag thin film was also used for comparison. (a) Raman signal of the nanostructures dipped in 10 μM R6G solution for 10 min, (b) Raman signal of the nanostructures with 50 μL of 10 μM R6G solution dropped into them.
Cha et al. Nanoscale Research Letters 2012 7:292 doi:10.1186/1556-276X-7-292