Nanoparticle bead gold/silver nanoparticles

Figure 7.12. Magnetic beads/nanoparticles based protocols for electrochemical detection of DNA. These assays involve the introduction of the probe-coated magnetic beads, addition of the target/hybridization event, magnetic removal ofunwanted materials, binding ofthe metal and amplified electrochemical detection ofthe dissolved gold [A], silver (B) and cadmium sulfide [D] nanoparticles. [C] Solid-state stripping and (E) multi-target detection protocols. Reprinted from Analytica Chimica Acta, 500, J. Wang, Nanoparticle-based electrochemical DNA detection, 247-257, 2003, with permission form Elsevier.

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