Carbon nanotubes based nanoelectrode arrays: Fabrication, evaluation, and application in voltammetric analysis

Yi Tu, Yuehe Lin, Wassana Yantasee, Zhifeng Ren

Research output: Contribution to journalArticle

96 Citations (Scopus)

Abstract

Fabrication, electrochemical characterization, and applications of low-site density carbon nanotubes based nano-electrode arrays (CNTs-NEAs) are reported in this work. Spin-coating of an epoxy resin provides a new way to create the electrode passivation layer effectively reducing electrode capacitance and current leakage. Cyclic voltammetry showed the sigmoidal shape curves with low capacitive current and scan-rate-independent limiting current. Square-wave voltammetry showed well-defined peak shapes in voltammograms of K 3Fe(CN)6 and 4-acetamidophenol (acetaminophen) and the peak currents to be proportioned to their concentrations, demonstrating the feasibility for voltammetric analysis of the CNTs-NEAs. The CNTs-NEAs were also used successfully for voltammetric detection of trace concentrations of lead(II) at ppb level at first-time. The CNTs-NEAs provide an excellent platform for ultra sensitive electrochemical sensors for chemical and biological sensing.

Original languageEnglish (US)
Pages (from-to)79-84
Number of pages6
JournalElectroanalysis
Volume17
Issue number1
DOIs
StatePublished - Jan 2005
Externally publishedYes

Fingerprint

Carbon Nanotubes
Carbon nanotubes
Fabrication
Electrodes
Acetaminophen
Epoxy Resins
Electrochemical sensors
Spin coating
Voltammetry
Passivation
Epoxy resins
Leakage currents
Cyclic voltammetry
Capacitance
Lead

Keywords

  • Carbon-nanotubes
  • Lead
  • Nanoelectrode arrays
  • Voltammetry

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Carbon nanotubes based nanoelectrode arrays : Fabrication, evaluation, and application in voltammetric analysis. / Tu, Yi; Lin, Yuehe; Yantasee, Wassana; Ren, Zhifeng.

In: Electroanalysis, Vol. 17, No. 1, 01.2005, p. 79-84.

Research output: Contribution to journalArticle

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