Electrochemical characterization of O2 plasma functionalized multi-walled carbon nanotube electrode for Legionella pneumophila DNA sensor

Eun Jin Park, Jun Yong Lee, Jun Hyup Kim, Sun Kug Kim, Cheol Jin Lee, Nam Ki Min

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

An electrochemical DNA sensor for Legionella pneumophila detection was constructed using O2 plasma functionalized multi-walled carbon nanotube (MWCNT) film as a working electrode (WE). The cyclic voltammetry (CV) results revealed that the electrocatalytic activity of plasma functionalized MWCNT (pf-MWCNT) significantly changed depending on O2 plasma treatment time due to some oxygen containing functional groups on the pf-MWCNT surface. Scanning electron microscope (SEM) images and X-ray photoelectron spectroscopy (XPS) spectra were also presented the changes of their surface morphologies and oxygen composition before and after plasma treatment. From a comparison study, it was found that the pf-MWCNT WEs had higher electrocatalytic activity and more capability of probe DNA immobilization: therefore, electrochemical signal changes by probe DNA immobilization and hybridization on pf-MWCNT WEs were larger than on Au WEs. The pf-MWCNT based DNA sensor was able to detect a concentration range of 10 pM-100 nM of target DNA to detect L. pneumophila.

Original languageEnglish
Article number08JH01
JournalJapanese Journal of Applied Physics
Volume49
Issue number8 PART 2
DOIs
Publication statusPublished - 2010 Aug 1

Fingerprint

Carbon nanotubes
DNA
deoxyribonucleic acid
carbon nanotubes
Plasmas
Electrodes
electrodes
sensors
Sensors
immobilization
Oxygen
probes
oxygen
Functional groups
Cyclic voltammetry
Surface morphology
Electron microscopes
X ray photoelectron spectroscopy
electron microscopes
photoelectron spectroscopy

ASJC Scopus subject areas

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

Cite this

Electrochemical characterization of O2 plasma functionalized multi-walled carbon nanotube electrode for Legionella pneumophila DNA sensor. / Park, Eun Jin; Lee, Jun Yong; Kim, Jun Hyup; Kim, Sun Kug; Lee, Cheol Jin; Min, Nam Ki.

In: Japanese Journal of Applied Physics, Vol. 49, No. 8 PART 2, 08JH01, 01.08.2010.

Research output: Contribution to journalArticle

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