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. Author manuscript; available in PMC: 2013 Dec 16.
Published in final edited form as: Biomaterials. 2012 Jul 17;33(30):10.1016/j.biomaterials.2012.06.089. doi: 10.1016/j.biomaterials.2012.06.089

Fig. 4.

Fig. 4

A process flow diagram for the surface modification of dual cytokine-binding aptasensors on adjacent gold electrodes. Electrochemical stripping method was utilized to selectively immobilize different aptamers on a desired gold surface. A negative potential (−1.2 V) was applied for 60 s in order to facilitate complete desorption of thiol SAMs layers from the electrodes prior to further modification.