Sandwich nanoporous framework decorated with vertical CuO nanowire arrays for electrochemical glucose sensing

Rui Li, Xiongjun Liu, Hui Wang, Yuan Wu, K. C. Chan, Zhaoping Lu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

26 Citations (Scopus)

Abstract

Increasing demands for electrochemical glucose sensors with high overall performance have recently attracted intensive attention. Herein, we report a novel sandwich-like nanoarchitecture composed of uniform CuO nanowire array layers grown on the nanoporous Cu 2 O film, which was synthesized via annealing the nanoporous copper thin film obtained by dealloying Cu-based metallic glass precursors. The glucose sensor based on the newly developed CuO/Cu 2 O nanocomposite exhibits prominent overall electrocatalytic performance towards the oxidation of glucose with a wide linear dynamic detection range from 0.1 to 6 mM, high sensitivity up to 1.95 mA/cm 2 ·mM, fast response time of less than 1.5 s, low detection limit of 1 μM (S/N = 3) as well as excellent selectivity. The enhanced electrocatalytic property of the nanocomposite is attributed to the high surface area originating from the in-situ grown CuO nanowire array structure and synergetic bi-continuous nanoporous Cu 2 O substrate. This finding not only provides promising candidates for blood glucose sensing, but also opens a new avenue to designing nanostructured catalysts for engineering applications in general.

Original languageEnglish
Pages (from-to)470-478
Number of pages9
JournalElectrochimica Acta
Volume299
DOIs
Publication statusPublished - 10 Mar 2019

Keywords

  • CuO nanowire
  • Dealloying
  • Electrocatalytic activity
  • Glucose sensor
  • Nanoporous

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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