Molecular recognition by gold, silver and copper nanoparticles

Figure 8 Schematic diagrams of the aptamer-based silver nanoparticles nanosensor showing the “OFF” (a) and “ON” (b) state based on the spacing distance between the Cyanine 3 and the silver nanoparticle surface in the detection of adenosine. From Wang et al[59], reproduced with permission from Elsevier.