Rapid, sensitive detection of neurotransmitters at microelectrodes modified with self-assembled SWCNT forests.

ABSTRACT: Carbon nanotube (CNT) modification of microelectrodes can result in increased sensitivity without compromising time response. However, dip coating CNTs is not very reproducible and the CNTs tend to lay flat on the electrode surface which limits access to the electroactive sites on the ends. In this study, aligned CNT forests were formed using a chemical self-assembly method, which resulted in more exposed CNT ends to the analyte. Shortened, carboxylic acid functionalized single-walled CNTs were assembled from a dimethylformamide (DMF) suspension onto a carbon-fiber disk microelectrode modified with a thin iron hydroxide-decorated Nafion film. The modified electrodes were highly sensitive, with 36-fold higher oxidation currents for dopamine using fast-scan cyclic voltammetry than bare elect

SUBMITTER: Xiao N 

PROVIDER: S-EPMC3445787 | biostudies-literature | 2012 Sep

REPOSITORIES: biostudies-literature