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A series of silver/silicon nanoporous pillar arrays (Ag/Si-NPAs) were prepared by an immersion-plating method through controlling the immersing times and their surface-enhanced Raman scattering (SERS) behaviors to rhodamine 6G (R6G) were contrastively studied. With a concentration of 10 −15 M, the identification of R6G could be performed by all the samples, but the corresponding peak intensities...
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