Size Effects of Closed Encounter Ag Nanoshell Pairs for SERS Application

Figure 5

Ag nanoshell pairs with proper sizes to obtain significant light enhancements between their gaps: (a) diameter 100 nm, thickness 10 nm by 633 nm light illumination; (b) diameter 100 nm, thickness 5 nm by 785 nm light illumination; (c) diameter 200 nm, thickness 7.5 nm by 633 nm light illumination; (d) diameter 200 nm, thickness 5 nm by 785 nm light illumination.

(a)

(b)

(c)

(d)