Amperometric biosensor based on glassy carbon electrode modified with long-length carbon nanotube and enzyme

Hajime Furutaka, Kentaro Nemoto, Yuki Inoue, Hiroki Hidaka, Hitoshi Muguruma, Hitoshi Inoue, Tatsuya Ohsawa

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

An amperometric biosensor based on a glassy carbon electrode modified with long-length multiwalled carbon nanotubes (MWCNTs) and enzyme nicotinamide-adenine-dinucleotide-dependent glucose dehydrogenase (GDH) is presented. We demonstrate the effect of the MWCNT length on the amperometric response of the enzyme biosensor. The long length of MWCNT is 200μm (average), whereas the normal length of MWCNT is 1 μm (average). The response of the long MWCNT-GDH electrode is 2 times more sensitive than that of the normal-length MWCNT-GDH electrode in the concentration range from 0.25-35 mM. The result of electrochemical impedance spectroscopy measurements suggest that the long-length MWCNT-GDH electrode formed a better electron transfer network than the normal-length one.

Original languageEnglish
Article number58001
JournalJapanese Journal of Applied Physics
Volume55
Issue number5
DOIs
Publication statusPublished - 2016 May 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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