Low temperature growth of dense carbon nanotube forest for electrochemical sensing of guanine

Abstract

A dense carbon nanotube forest was grown on carbon substrates and applied to an electrode for electrochemical sensing of guanine. The large surface area, in addition to the fast electron transfer kinetics of the carbon nanotube forest, enabled the detection of guanine with high sensitivity. Compared with conventional metal electrodes such as Au and Pt as well as carbon substrates, the carbon nanotube forest directly grown on carbon substrates showed significantly higher sensitivity indicating its potential as an electrode material for electrochemical biosensors.