Flexible electrochemical biosensors based on O2 plasma functionalized MWCNT

Jun Yong Lee, Eun Jin Park, Cheol Jin Lee, Soo Won Kim, James Jungho Pak, Nam Ki Min

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)


A flexible glucose sensor is fabricated using O2 plasma-functionalized multiwalled carbon nanotube (MWCNT) films on polydimethylsiloxane (PDMS) substrates and its performance is electrochemically characterized. After enzyme immobilization, the GOD/ MWCNT/Au/PDMS electrode exhibits a sensitivity of 18.15 μA mm- 2mM- 1 and a detection limit of 0.01 mM (signal to noise ratio was about 3). This high sensitivity may be attributed to a large enzyme loading and a higher electrocatalytic activity and electron transfer exhibited by O2 plasma-functionalized CNTs than the pristine CNT, due to some oxygen-contained groups present on the O2 plasma-functionalized CNT surface, which has been verified by XPS spectrum.

Original languageEnglish
Pages (from-to)3883-3887
Number of pages5
JournalThin Solid Films
Issue number14
Publication statusPublished - 2009 May 29

Bibliographical note

Funding Information:
This work was supported by grant No. K20601000002-07E0100-00210 from Korea Foundation for International Cooperation of Science & Technology and by a Korea University Grant.

Copyright 2009 Elsevier B.V., All rights reserved.


  • Flexible biosensors
  • MWCNTs
  • Plasma-treatment

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry


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