Fig. 8
From: Nanostructured plasmonic substrates for use as SERS sensors
a–e Reproduced with permission from Ref. [56], © 2011, American Chemical Society. f–h Reproduced with permission from Ref. [57], © 2011, Nature Publishing Group
Nanoimprint lithography a Procedure used to fabricate gold nanofinger patterns. b SEM images of the assembled nanofinger arrays for use in preparing digon, trigon, tetragon, pentagon, or hexagon configurations. The first row shows a top-view and the second row shows a tilted view. c Raman spectra of BPEs obtained from six different geometries. d Comparison of the SERS signals obtained from six different geometries. e FDTD simulations of the electric field intensity distributions measured near the pentagon and hexagon structures. f Double resonance plasmonic structures fabricated from nanoimprint lithography. g SEM image of a top view of the plasmonic structures. h SERS spectra of three different cavity shapes.