Fig. 5From: Gradient Annealing as a New Strategy to Fabricate Gradient Nanoparticle Array on MicrowiresTypical SERS spectra of R6G on microwire with and without gold GNPA at a 532 nm and b 785 nm laser excitation. c SERS line scan along the size gradient shows the variation of the position-dependent SERS intensityBack to article page