Dual-functional CuxO/Cu electrodes for supercapacitors and non-enzymatic glucose sensors fabricated by femtosecond laser enhanced thermal oxidation

Suocheng Wang, Lan Jiang, Jie Hu, Qingsong Wang, Shenghua Zhan, Yongfeng Lu

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

A facile approach is proposed to fabricate porous CuxO nanostructures on copper foil. By conducting femtosecond laser ablation and thermal oxidation, in-situ CuxO nanostructures growth was induced on the copper foil. These structures act as active and sensitive materials for supercapacitor and glucose sensor electrodes. By controlling the laser fluences and scan rates, various morphologies were obtained. The specific capacitance of the porous CuxO/Cu electrode reached 156.72 mF cm−2 at the current density of 1 mA cm−2, which was larger than that obtained without femtosecond laser ablation, and it was maintained at 83% as the current density increased to 12 mA cm−2. Through femtosecond laser pretreatment, micro/nanostructures were patterned on copper foil surface, enhancing the surface specific area for redox reaction. In addition, the sidewalls of the patterned structures offered nucleation sites of the diffused Cu ion and promoted the growth of copper oxide nanowires. Moreover, the non-enzymatic glucose sensors of the porous CuxO/Cu electrode had two linear ranges of 0.01–0.2 mM and 0.5–1.6 mM with the sensitivities of 1212.016 and 852.798 μA mM−1, respectively. These results indicate that the porous CuxO nanostructures and nanowires prepared using this facile method have potential applications in supercapacitor and enzyme-less glucose sensor electrodes.

Original languageEnglish (US)
Article number152105
JournalJournal of Alloys and Compounds
Volume815
DOIs
StatePublished - Jan 30 2020

Keywords

  • Femtosecond laser
  • Patterned
  • Porous
  • Thermal oxidation

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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