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Sensitive Detection of H2o2 Released From Cancer Cells With Electrochemiluminescence Sensor Based on Electrochemically Prepared Polypyrrole@Ce: Dy Tungstate/Polyluminol Publisher



Sobhanie E1 ; Hosseini M2, 3 ; Faridbod F1 ; Ganjali MR1
Authors
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Authors Affiliations
  1. 1. Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran
  2. 2. Nanobiosensors Lab, Department of Life Science Engineering, Faculty of New Sciences & Technologies, University of Tehran, Tehran, Iran
  3. 3. Medical Biomaterials Research Center, Tehran University of Medical Sciences, Tehran, Iran

Source: Journal of Electroanalytical Chemistry Published:2023


Abstract

The sensitive and rapid detection of H2O2 release from living cells has essential significance in the early diagnosis of many diseases. In this manuscript, a solid-state electrochemiluminescence (ECL) sensor was fabricated for ultrasensitive detection of Hydrogen peroxide (H2O2) with a comprehensive linear response in the ranges of 1 pmol/L to 10 μmol/L and a low detection limit of 0.198 pmol/L limit of quantification is 0.602 pmol/L. Briefly, The ECL sensor was developed based on electrodeposition layers of polypyrrole-Ce: Dy(WO4)3 nanocomposite for surface modification. Then poly Luminol was immobilized by electropolymerization on a glassy carbon electrode (GCE) surface as an ECL emitter. The properties of polypyrrole-Ce: Dy(WO4)3 nanocomposite and the modified electrode were evaluated using FE-SEM, Cyclic voltammetry (CV), Electrochemical impedance spectroscopy (EIS), and Atomic force microscopy (AFM) methods. Moreover, the ECL response of the PPy-Ce: Dy(WO4)3/Polyluminol electrode was applied to monitor the H2O2 level release from breast cancer cells (MCF-7). The ECL intensity was related to the logarithm of MCF-7 cell numbers, and the detection limit was 30 cells mol/L. Consequently, this ECL sensor was successfully applied to detect H2O2 released from living cancer cells with the advantages of sensitivity, reproducibility, rapid response, long-term stability, ease of operation, and low cost. © 2023 Elsevier B.V.
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