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Fig. 6 | Nano Convergence

Fig. 6

From: Nanostructured plasmonic substrates for use as SERS sensors

Fig. 6

ac Reproduced with permission from Ref. [44], © 2011, John Wiley and Sons. df Reproduced with permission from Ref. [45], © 2012, American Chemical Society

Hot-spot generation using block copolymer lithography. a Schematic diagrams illustrating the procedures used to fabricate a block copolymer-assisted SERS substrate. b SEM images of gold nanoparticle arrays prepared with different overgrowth times of 1, 3, 7, or 15 min. c SERS spectra of 4-aminobenzenethiol, obtained from gold nanoparticles with different overgrowth times. d Schematic diagrams illustrating the block copolymer micelle-assisted silver nanocluster assembly. e, f SEM image of silver nanocluster arrays obtained by controlling the weight percent of PS and the PS molecular weight: e 10,400 g/mol or f 122,000 g/mol, using similar weight percentages of P4VP.

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