Fabrication and Electrochemical Characterization of Multi-walled Carbon Nanotube Electrode for Application to Nano-electrochemical sensing

다국어 초록 (Multilingual Abstract)

In this study, we fabricated and electrochemically characterized two types of individual carbon nanotube electrodes: an as-produced multi-walled carbon nanotube (MWNT) electrode and a modified MWNT electrode. As-produced MWNTs were electrically contacted with Au/Ti layers using nanolithography and RF magnetron sputtering. Open-ended modified MWNT electrodes were fabricated by reactive ion etching treatment under oxygen atmosphere. We also performed cyclic voltammetry measurements for detecting aqueous dopamine solutions with different concentrations. We found that an individual MWNT electrode, which has a small effective area, shows good electrochemical performance. The electrocatalytic behavior of the modified electrode, which had "broken" open ends were better than that of the as-produced electrode with respect to sensitivity. The modified electrode is capable of detecting dopamine at the picomolar level. Therefore, an individual modified MWNT electrode has potential for application to active components in nanobiosensors.

참고문헌 (Reference)

1 D. W. M. Arrigan, 129 : 1157-, 2004

2 P. Li, 111 : 1672-, 2007

3 K. Balasubramanian, 385 : 452-, 2006

4 K. Gong, 21 : 1383-, 2005

5 L. Viry, 389 : 499-, 2007

6 K.-H. An, 39 : S511-, 2001

7 I. Heller, 5 : 137-, 2005

8 K. Yum, 1 : 440-, 2007

9 C. E. Banks, 17 : 829-, 2005

10 N. Punbusayakul, 10 : 13-, 2007

11 P. J. Britto, 41 : 121-, 1996

12 C. Hu, 418 : 524-, 2005

13 H.-S. Wang, 22 : 664-, 2006

14 M. D. Rubianes, 17 : 73-, 2005

15 S. Roy, 17 : S14-, 2006

16 M. D. Rubianes, 5 : 689-, 2003

17 C. E. Banks, 16 : 1804-, 2004

18 L. Lin, 384 : 1308-, 2006

19 A. J. Bard, "Electrochemical Methods: Fundamentals and Applications" John Wiley & Sons 2000

20 Bonghyun Park, "Effective Electrochemical Gating of Hole Transport in Aligned Single-Walled Carbon Nanotube Network Thin Film Transistors" 한국물리학회 49 (49): 828-832, 2006