Xudong Tan, Lan Jiang, Jie Hu, Pengjun Liu, Andong Wang, Yong Lu. Highly sensitive and homogeneous SERS substrate fabricated by a femtosecond laser combined with dewetting[J]. Chinese Optics Letters, 2015, 13(11): 111401
- Chinese Optics Letters
- Vol. 13, Issue 11, 111401 (2015)
Fig. 1. Schematic fabrication process of SERS substrates.
Fig. 2. (a) SEM image and (b) AFM profile of the surface morphology written on silicon samples. The scale bar represents 2 μm.
Fig. 3. SEM images of NPs (a) on flat silicon surface and (c) on the ripple structure of 10 nm Au film dewetting; (b) and (d) are size distribution of NPs, respectively.
Fig. 4. (a) SERS spectra of different processing substrate. Red: FS+NPs area with
Fig. 5. SERS spectrum on fs laser-machined, gold-coated, thermal dewetting substrates coating different thicknesses of films.
Fig. 6. EFs of SERS signal at
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