High-performance enzyme-free glucose and hydrogen peroxide sensors based on bimetallic AuCu nanoparticles coupled with multi-walled carbon nanotubes

Ni Zhang, Jinfeng Zhou, Wei Su, Jiayi Yang, Zhuyi Zhu, Yueling Liu, Ping Wang

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Interest in designing and manufacturing non-enzymatic biosensors is growing which stimulates the increased research efforts to explore innovative nanocomposites with highly catalytic activity. Here, the development of high-performance non-enzymatic glucose and hydrogen peroxide (H2O2) sensors based on bimetallic AuCu nanoparticles coupled with multi-walled carbon nanotubes (AuCu@MWCNTs) was achieved in this work. They were investigated by the cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and chronoamperometry (CA) methods separately. Benefiting from the synergistic effects of AuCu@MWCNTs, the proposed biosensors exhibited excellent performance such as low detection limits (1.3 nM for glucose, 0.1 nM for H2O2), broad linear ranges (8 nM-60 mM for glucose, 1 nM-4 mM for H2O2) and high sensitivities (362.3 μA·mM−1·cm−2 for glucose, 1335 μA·mM−1·cm−2 for H2O2). Besides, the AuCu@MWCNTs based electrodes provided excellent stability, repeatability and reproducibility. Based on the outstanding performance, they exhibited good reliability and accuracy in the detection of glucose in goat serum samples and real-time monitoring of H2O2 released by living cells. The present work suggests that the fabricated biosensor holds great potential for non-enzymatic glucose determination and real-time quantitative detection of H2O2 in biomedical applications.

Original languageEnglish (US)
Article number108504
JournalMicrochemical Journal
Volume189
DOIs
StatePublished - Jun 2023
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Foundation of China (Grant number 21804043), the Shanghai Sailing Program (Grant number 18YF1405800) and the Funding Project of the State Key Laboratory of Bioreactor Engineering.

Publisher Copyright:
© 2023 Elsevier B.V.

Keywords

  • Bimetal
  • Enzyme-free
  • Glucose
  • Multi-walled carbon nanotubes
  • Nanocomposite

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