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Square wave voltammograms (SWV) of the electrochemical sensor composed of MIP/ZnO-MWNT-CS@ITO electrodes with different concentrations (a) 1.0 × 10−6 M; (b) 1.0 × 10−5 M; (c) 1.0 × 10−4 M, and (d) NIP/ZnO-MWNT-CS@ITO with 1.0 × 10−4 M concentration of (A) p-nitrophenol; (B) m-nitrophenol; and (C) o-nitrophenol in PBS solutions. Reproduced from [117] with permission from Elsevier, 2012.
