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. 2013 Feb 7;13(2):2267–2278. doi: 10.3390/s130202267

Figure 1.

Figure 1.

Schematic representation of label-free electrical detection of DNA hybridization using PNA or DNA probes. (a) Electrometer-based potentiometric setup for monitoring changes in charge density upon capturing DNA target at the solution/microelectrodes interface. The images indicate the gold microelectrodes array. (b) Differences in the backbone structure and electrostatic nature of PNA and DNA.