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(A) Cyclic voltammograms recorded at (1) CNT film electrode in air-equilibrated solution, (2) GOx/CNT film electrode in O2-free solution, and (3) CNT film electrode in O2-free solution. (B) Cyclic voltammograms recorded at GOx/CNT film electrode in air-equilibrated solution containing (4) 0 and (5) 0.60 mM glucose. All films contained chitosan as an immobilization matrix. Background electrolyte, pH 7.40 phosphate buffer solution. Scan rate, 50 mV s-1.
