Capacitive biosensors for ultra-sensitive assays

Capacitive binding assays have long been considered highly sensitive. The underlying method in such assays includes sending short potential pulses and then registering the current. However, with the introduction of current pulses and registration of potential responses, the stability improved significantly, leading to assays of extreme sensitivities. The new assaying technology has been applied in a range of affinity binding assays, from immunoassays via DNA base pairing to the use of molecularly imprinted polymers (MIPs). Overall, very good sensitivities have been recorded, and the MIPs exhibit high stability and reusability. (C) 2015 Elsevier B.V. All rights reserved.