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. Author manuscript; available in PMC: 2013 Dec 17.
Published in final edited form as: Bioelectrochemistry. 2009 Mar 20;76(0):10.1016/j.bioelechem.2009.03.007. doi: 10.1016/j.bioelechem.2009.03.007

Fig. 3.

Fig. 3

Coadsorbate effect on E-DNA response time: Nature and charge of co-adsorbate affect the response times (the time needed for the stabilization of the current signal in the presence of target). While all five probes equilibrate similarly rapidly, the positive charge of C2-amine SAMs leads to the most rapid hybridization: with a 17 base, fully complementary target (T-17) we observe an equilibration half-life (time for half of the signal to occur) of ~15 min. Conditions are as for Fig. 2. Shown are the signal suppression values (% ratio of current signal—A—obtained in target—Itarget—and current signal obtained in buffer—Ibuffer) vs. time after target (T-17) injection.