Vertically oriented single-wall carbon nanotube/enzyme on silicon as biosensor electrode

Yubing Wang, Zafar Iqbal

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Thin films of vertically aligned individual single-wall carbon nanotubes (SWNTs) were deposited on silicon using a chemical vapor deposition (CVD) process. Oriented SWNT growth was achieved by employing two methods of catalyst precursor self-assembly followed by ethanol CVD. Using the silicon substrate as the working electrode in an electrochemical cell and the enzyme β-NAD (nicotinamide adenine dinucleotide) synthetase dissolved in a buffered electrolyte solution, the enzyme was attached at the nanotube ends. This was shown using scanning electron microscopy and cyclic voltammetry. Enzyme immobilization on the 1 nm to 2 nm diameter tube ends of the individual SWNTs will allow for dense packing of the enzyme and utilization of the electrode as an enzymatic sensor in a biofuel cell configuration.

Original languageEnglish (US)
Pages (from-to)27-29
Number of pages3
Issue number6
StatePublished - Jun 2005

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • General Engineering


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