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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. 5.

Fig. 5

Cross-contamination test with dual aptasensor responding to either IFN-γ or TNF-α. (A–D) responses of a typical pair of half-ring electrodes challenged with cytokines. (A) IFN-γ sensing electrode challenged with 50 ng/mL IFN-γ shows a significant change in signal whereas (B) TNF-α sensing electrode exposed to 50 ng/mL IFN-γ did not respond. In contrast, (C) IFN-γ sensing half-ring electrode did not respond to 50 ng/mL TNF-α but (D) TNF-α sensing electrode showed a strong signal to this cytokine. (E) Responses of two electrodes to their specific target cytokine. The data points and error bars represent average and standard deviations of measurements from three different aptasensors (n = 3).