Abstract
Fully integrated carbon nanotube-based three-electrode electrochemical systems were photolithographically prepared on glass substrates and electrochemically characterized. O2 plasma treatment of the transferred single-walled carbon nanotube (SWCNT) film was voltammetrically optimized in terms of applied plasma power and the elapsed time. The patterned thin film Ag layer was chemically oxidized in an acidic solution for various dip times to form a chlorinated Ag layer. The Nernstian behavior of as-prepared and seven-day-aged Ag/AgCl thin-film electrodes was investigated for optimization, and the electrode's electrochemical attributes were compared to a commercial reference electrode. A quality control evaluation and a performance assessment of the fully integrated SWCNT-transferred sensing systems were performed using cyclic voltammetry. The proposed SWCNT-based three-electrode device exhibited clear electrochemistry under voltammetric conditions, and is therefore a candidate for use in all electrochemical biosensors.
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