کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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220231 | 463322 | 2009 | 6 صفحه PDF | دانلود رایگان |

A novel carbon nanotubes (CNTs) film-modified electrode was developed by controllable adsorption of the CNTs onto the monolayer of dodecylamine chemically modified glassy carbon electrode (GCE). The electrochemical characteristics of the dodecylamine monolayer-modified GCE were examined by electrochemical impedance spectroscopy and cyclic voltammetry. Compared with the self-assembled monolayer (SAM) of dodecanethiol-modified gold electrode, the prepared dodecylamine monolayer-modified GCE presented a smaller resistance and a higher capacitance. In addition, after single wall carbon nanotubes (SWCNTs) were controllably adsorbed onto the both modified electrodes by hydrophobic interaction, the dodecylamine monolayer-modified GCE showed a larger capacitance than that of bare GCE for its small resistance and good conductivity of CNTs, but the SAM of dodecanethiol-modified gold electrode was failed to achieve the same result. Furthermore, the proposed SWCNTs dodecylamine monolayer-modified GCE was successfully used to determine dopamine in the presence of ascorbic acid after it adsorbed the ssDNA.
Journal: Journal of Electroanalytical Chemistry - Volume 634, Issue 2, 15 September 2009, Pages 98–103