Designs and Materials of Electrodes for Electrochemical Sensors
Abstract
Electrode material selection and structural designs of electrochemical chips are fundamental parameters in the field of electrochemical sensing. These parameters directly affect sensor conductivity, selectivity, stability, surface area, and overall performance. This article summarizes the most common electrode architectures and commercially available materials currently used in the development of electrochemical sensors, including carbon‐based materials (e.g., boron‐doped diamond, graphite, graphene, glassy carbon, carbon nanotubes, and carbon fibers), metal‐based materials and alloys (e.g., gold, platinum, silver, nickel, and metal oxides), conductive polymers (e.g., polyaniline, polypyrrole, and poly(3,4‐ethylenedioxythiophene)), and redox dyes and mediators (Prussian blue, Meldola blue, etc.). It highlights the advantages of each category and identifies suitable electrode materials for specific target analytes. Finally, this review aims to guide readers in selecting appropriate electrode materials and designs tailored to a specific application.
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