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

doi:10.1016/j.tsf.2009.01.130

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 journal › Article › peer-review

32 Citations (Scopus)

Abstract

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^{- 2}mM^{- 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 language	English
Pages (from-to)	3883-3887
Number of pages	5
Journal	Thin Solid Films
Volume	517
Issue number	14
DOIs	https://doi.org/10.1016/j.tsf.2009.01.130
Publication status	Published - 2009 May 29

Keywords

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

Access to Document

10.1016/j.tsf.2009.01.130

Cite this

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title = "Flexible electrochemical biosensors based on O2 plasma functionalized MWCNT",

abstract = "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.",

keywords = "Flexible biosensors, MWCNTs, Plasma-treatment",

author = "Lee, {Jun Yong} and Park, {Eun Jin} and Lee, {Cheol Jin} and Kim, {Soo Won} and Pak, {James Jungho} and Min, {Nam Ki}",

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

year = "2009",

month = may,

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doi = "10.1016/j.tsf.2009.01.130",

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T1 - Flexible electrochemical biosensors based on O2 plasma functionalized MWCNT

AU - Lee, Jun Yong

AU - Park, Eun Jin

AU - Lee, Cheol Jin

AU - Kim, Soo Won

AU - Pak, James Jungho

AU - Min, Nam Ki

N1 - 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: Copyright 2009 Elsevier B.V., All rights reserved.

PY - 2009/5/29

Y1 - 2009/5/29

N2 - 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.

AB - 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.

KW - Flexible biosensors

KW - MWCNTs

KW - Plasma-treatment

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