Fig. 4
From: Nanostructured plasmonic substrates for use as SERS sensors
a, b Reproduced with permission from Ref. [35], © 2012, John Wiley and Sons. c Reproduced with permission from Ref. [36], © 2012, John Wiley and Sons. d, e Reproduced with permission from Ref. [37], © 2015, American Chemical Society
Self-assembly of plasmonic metal nanoparticles. a SEM images of gold nanoclusters prepared with different coordination numbers. b SERS enhancement factors for different coordination numbers of gold nanoclusters. c High-resolution SEM images of self-assembled gold nanorod (GNR) arrays. d SEM image of a silver nanoparticle monolayer. e SERS spectra of crystal violet molecules, obtained from the sample shown in (d).