Investigation of the mechanism of adsorption of β-nicotinamide adenine dinucleotide on single-walled carbon nanotubes

Roberto Scipioni, Martin Pumera, Mauro Boero, Yuji Miyahara, Takahisa Ohnoz

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

We address in this manuscript the important issue of the stability of single-walledcarbonnanotube(SWCNT)-based electrodes upon oxidation of NADH to NAD+. NADH and NAD+ play a key role in the development of electrochemical enzyme-based biofuel cells and biosensors. However, most of the electrode materials exhibit strong surface passivation when oxidation of NADH to NAD+ occurs. SWCNT-based electrodes are not affected bysuch apassivation effect.In the present work, we address the fundamental question, "why are the single-walled carbon nanotube electrodes prone topassivation?" using electrochemical methods and first-principles molecular dynamics simulations. We found that this is due to the wide exposed surface of SWCNT-based electrodes rather than other "inherent" properties of SWCNTs, such as the electrocatalytic effect and high curvature.

Original languageEnglish
Pages (from-to)122-125
Number of pages4
JournalJournal of Physical Chemistry Letters
Volume1
Issue number1
DOIs
Publication statusPublished - 2010 Jan 1

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Physical and Theoretical Chemistry

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