Figure 5
From: Microscopic Differentiation of Plasmonic Nanoparticles for the Ratiometric Read-out of Target DNA

Typical SEM images of magnetic beads loaded with AuNRs by the aid of DNA hybridization between complementary DNA. The concentration of target DNA used was (a) 0, (c) 1, and (e) 4 pM, respectively. (b) 0, (d) 1, and (f) 4 pM are the corresponding whole images of the magnetic beads.