Comparison of Copper(II) Oxide Nanostructures with Different Morphologies for Nonenzymatic Glucose Sensing

Baoyue Fan, Brian D. Spindler, Wenyang Zhao, Hoffman Chan, Zhao Wang, Minog Kim, Yevedzo Chipangura, Philippe Bühlmann, Andreas Stein

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12 Scopus citations

Abstract

The glucose sensitivity achieved with copper(II) oxide particles with three different morphologies (spheres, platelets, and needles) for application in nonenzymatic glucose sensors was investigated. The morphologies of CuO nanoparticles were controlled by different synthesis parameters, including changes in precipitators of Cu(II) ions, pH values, calcination protocol, and the addition of surfactant and hydrogen peroxide. The role of copper(II) oxide particle morphology in nonenzymatic glucose sensing was studied. The primary driving factor in the electrocatalytic process was investigated for several morphological properties of the material. We studied the effects of exposed crystal faces, specific surface area, pore volume, and grain size of copper oxides on glucose sensitivity. This study showed that the electrocatalytic performance in glucose sensing correlates primarily with the grain size of copper oxide nanoparticles and the capacitance introduced therefrom. The needle-shaped CuO nanoparticles presented the optimal morphology in this application, resulting in good sensitivity to glucose (2.05 mA·mM-1·cm-2), a linear range of 0.05-5 mM glucose, and the best long-term stability among these materials. This work provides insight into the potential use of CuO-based materials in biosensors and into the major contributing factors of metal oxide-based nanoparticles in sensing applications.

Original languageEnglish (US)
Pages (from-to)1475-1486
Number of pages12
JournalACS Applied Nano Materials
Volume6
Issue number2
DOIs
StatePublished - Jan 27 2023

Bibliographical note

Funding Information:
This work was partially supported by funding from the Industrial Partnership for Research in Interfacial and Materials Engineering (IPRIME-NMP) at the University of Minnesota. Parts of this work were carried out at the Characterization Facility, University of Minnesota, which receives partial support from the NSF through the MRSEC (Award Number DMR-2011401) and the NNCI (Award Number ECCS-2025124) programs. H.C. acknowledges a National Science Foundation (NSF) REU summer fellowship (Grant CHE-1851990). The authors thank Professor R.L. Penn for use of the powder X-ray diffractometer, Dr. Y. Sun for useful discussions and advice on schemes, and X. Dong for assistance with XPS analyses.

Publisher Copyright:
© 2023 American Chemical Society. All rights reserved.

Keywords

  • copper oxide nanoparticles
  • electrocatalysis
  • grain size
  • morphology
  • nonenzymatic glucose sensing
  • surface area

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