Electrochemical Biosensors for Sugar Detection
Summary
Electrochemical biosensors for sugar detection marry the specificity of biorecognition with the sensitivity of electrochemical transduction. These devices typically employ oxidoreductase enzymes—such as glucose oxidase, invertase or lactase—immobilised on conductive platforms. Enzymatic oxidation of the target sugar generates electrons or electroactive species that are quantified via amperometry, voltammetry or impedance measurements. Advances in electrode design exploit nanomaterials—including carbon nanotubes, graphene and metal nanoparticles—to enhance electron transfer, increase surface area and improve biocompatibility. Such innovations have yielded sensors with rapid response times, broad linear ranges and low detection limits, finding applications across clinical diagnostics, food quality monitoring and point-of-care testing. The evolution from first-generation sensors, relying on direct oxygen consumption or hydrogen peroxide generation, to second-generation systems utilising redox mediators, and ultimately to mediator-free, third-generation architectures underscores the field’s progression towards miniaturisation, robustness and real-time analysis. Future developments aim to integrate multi-enzyme arrays, flexible substrates and wireless data transmission to realise truly wearable or implantable sugar monitoring platforms.
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Electrochemical Biosensors for Sugar Detection publication trend
The graph below shows the total number of articles in electrochemical biosensors for sugar detection across all publications each year (not limited to Nature Index journals).
Technical terms
Electrochemical biosensor: A device that transduces a biochemical reaction into an electrical signal via an electrode interface.
Amperometric detection: Measurement of current produced by the oxidation or reduction of an electroactive species at a fixed potential.
Immobilisation: The process of fixing enzymes or other bioreceptors onto a sensor surface to retain activity and stability.
Redox mediator: A small molecule that shuttles electrons between the enzyme’s active site and the electrode, lowering operational potentials.
Linear dynamic range: The concentration interval over which sensor response is directly proportional to analyte concentration.
Limit of detection: The lowest analyte concentration that yields a signal distinguishable from background noise.
References
- Immobilization of Enzyme Electrochemical Biosensors and Their Application to Food Bioprocess Monitoring. Biosensors (2023).
- Recent Advances in Electrochemical Enzyme-Based Biosensors for Food and Beverage Analysis. Foods (2023).
- Nanomaterial-Based Electrochemical Nanodiagnostics for Human and Gut Metabolites Diagnostics: Recent Advances and Challenges. Biosensors (2022).
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