Ag nanoplates modified-screen printed carbon electrode to improve electrochemical performances toward a selective H2O2 detection

• Published in: IEEE transactions on instrumentation and measurement 2023-01, Vol.72, p.1-1
• Main Authors: Zribi, Rayhane, Ferlazzo, Angelo, Fazio, Enza, Condorelli, Marcello, D'Urso, Luisa, Neri, Giulia, Corsaro, Carmelo, Neri, Fortunato, Compagnini, Giuseppe, Neri, Giovanni
• Format: Article
• Language: English
• Subjects: <italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">electric field enhancement; <italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">electrochemical sensor; <italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">hydrogen peroxide; <italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">screen printed carbon electrode; <italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">silver nanoplates; <italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">surface plasmon resonance; Biosensors; Carbon; Electric fields; Electrodes; Electromagnetic fields; Finite difference methods; Hydrogen peroxide; Nanoparticles; Sensitivity; Sensor phenomena and characterization; Shape; Silver; Time domain analysis; Voltammetry
• ISSN: 0018-9456; 1557-9662
• DOI: 10.1109/TIM.2023.3253902

Sensors based on silver nanoplates (Ag NPT) colloidal solutions, deposited onto screen printed carbon electrodes (SPCE), were fabricated and characterized. Cyclic voltammetry (CV) and linear sweep voltammetry (LSV) analyses were carried out to test the sensor performances towards hydrogen peroxide (H 2 O 2 ), selected as a model analyte of reactive oxygen species (ROS) involved in the regulation of metabolic/inflammatory diseases. H 2 O 2 electrochemical sensing response, in terms of kinetic and sensitivity improvement, was wavelength-dependent and size-tunable. This was further confirmed by the simulation of electromagnetic field distributions based on finite difference time domain (FDTD) method. The electroanalytical behavior of the Ag NPT modified-electrodes in the presence of H 2 O 2 has been studied by using the fabricated biosensor which demonstrated a sensitivity of 0.046 μA/μM for H 2 O 2 concentrations lower than 100 μM. This work proposes a surface-engineering approach to design and develop electrochemical redox probes using Ag nanoparticles (Ag NPs) with particular nanoplates morphology.