Improved Voltammograms of Hydrocaffeic Acid on the Single-Walled Carbon Nanotube/Graphite-Film Surfaces

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.