International Journal of Electrochemistry / 2011 / Article / Fig 3

Review Article

Electrochemical Aptamer-Based Biosensors: Recent Advances and Perspectives

Figure 3

Impedimetric aptasensor: the binding of a target to the aptamer reduces the electron transfer (et) of a small redox mediator diffusing to the electrode surface and the increase the interfacial resistance, which provides a means of measuring the concentration of bound target via impedance spectroscopy.

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