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The performance of a single-walled carbon nanotube (SWCNT)/graphite-film electrode, prepared by mixing SWCNTs and graphite powder in equal weight fractions with a small amount of paraffin, was investigated. The electrode shows excellent electrochemical behavior for the redox of hydrocaffeic acid (HCA), an important biological molecule. It gives a significant decrease in overvoltage for HCA oxidation as well as a dramatic improvement in reversibility of the HCA redox behavior in comparison with the graphite-film and glassy carbon electrodes.

single-walled carbon nanotube --- cyclic voltammetry --- hydrocaffeic acid --- nanoscience --- nanotechnology