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. 2016 Aug 10;6(8):146. doi: 10.3390/nano6080146

Figure 4.

Figure 4

(a–c) Metallized H-shapes, two parallel bars and rings. Insets are the corresponding structures before metallization, scale bars are 250 nm [93]. (d) SERS spectrum of aminobenzenethiol obtained by using the four-corner bound AuNPs structure (inset) for enhancement of the Raman signal. (e) Structures with just a single AuNP resulted in an insignificant SERS signal [94]. (f) A single origami bar metallized with both gold and copper on either side [96]. (g–i) T-shaped DNA structures with AuNPs bound to one branch, both branches (inset in (h)) and only on the edges of the T-branches (inset in (i)). The structures in the insets of (h) and (i) were further metallized into continuous metal structures as shown in (h) and (i). Scale bars in insets of (g) and (h) are 500 nm and of (i) 100 nm [91]. (j,k) Ring and cross patterns fabricated by reducing gold seeds that were bound via electrostatic attraction [97]. (a–c) are reproduced with permission from [93]. Copyright American Chemical Society, 2011; (d–e) are reproduced with permission from [94]. Copyright American Chemical Society, 2014; (f) is reproduced with permission from [96]. Copyright American Chemical Society, 2014; (g–i) are reproduced with permission from [91]. Copyright American Chemical Society, 2012; (j,k) are reproduced with permission from [97]. Copyright John Wiley and Sons, 2011.