Preparation of L-Cys-Au colloid self-assembled nanoarray electrode based on the microporous aluminium anodic oxide film and its application to the measurement of dopamine

A novel method for fabricating-a nanoarray electrode combining the template technique with the self-assembled approach was developed. The glassy carbon electrode was modified with the Au nanoarray using micropores of aluminum anodic film as template. Then, the An nanoarray electrode was self-assembled with L-cysteine (L-CYS) and gold colloid, respectively. In order to evaluate the electrochemical characteristics of L-Cys-Au colloid self-assembled nanoarray electrode, Fe(CN)(6)(3-) was chosen as molecule probe and cyclic voltammetry was used. In addition, the functional nanoarray electrode was applied to measuring dopamine (DA). The resulting L-Cys-Au colloid self-assembled nanoarray electrode demonstrated that the linear calibration range extended over three orders of magnitude of DA concentrations (1.0 x 10(-9)-1.0 x 10(-6) mol/L) and the detection limit was 5.0 x 10(-10) mol/L. (C) 2004 Elsevier B.V. All rights reserved.