Electrochemical Sensing Techniques for Biomedical Applications

Electrochemical sensing exploits the relationship between electrical signals and biochemical interactions to detect and quantify a broad range of biological analytes. Techniques such as amperometry, voltammetry and impedance spectroscopy provide rapid, sensitive and cost-effective platforms for monitoring metabolites, nucleic acids, proteins and ions in physiological fluids and tissues. The versatility of electrode materials, from carbon-based nanomaterials to metal oxides, supports the tailoring of sensor performance for specific biomarkers. Recent advances in miniaturisation and integration with microfluidics and wireless communication have enabled the development of wearable and implantable devices, facilitating continuous real-time monitoring in clinical and point-of-care settings. Surface modification strategies, including molecular imprinting and bioreceptor immobilisation, enhance selectivity and reduce biofouling. Ongoing research seeks to refine detection limits, stability and multiplexing capabilities, paving the way for personalised diagnostics and therapeutic management across a spectrum of diseases.

Research from Nature Portfolio

Recent studies have demonstrated the use of flexible electrochemical patches that integrate graphene-based electrodes with sweat microfluidics, achieving real-time monitoring of electrolytes and metabolites during physical activity. Another work has introduced biocompatible polymer coatings on implantable microelectrodes to mitigate protein fouling and extend sensor lifespan in continuous glucose monitoring applications. A third investigation explored nanoscale catalytic interfaces incorporating transition-metal dichalcogenides to enhance electron transfer kinetics for the ultrasensitive detection of inflammatory biomarkers in serum, achieving detection limits in the picomolar range. Collectively, these contributions underscore the trend towards multifunctional, user-friendly devices suitable for non-invasive and minimally invasive biomedical diagnostics.

Research from all publishers

A portable wireless nanosensor employing a black phosphorene–nanodiamond composite on a screen-printed electrode has been applied to detect a drug metabolite with a detection limit down to 3 nmol l–1, demonstrating the potential of layered two-dimensional materials for rapid field analysis. Another study developed a TiO2-MXene/PEDOT:PSS composite electrode for the sensitive determination of a flavonoid molecule in urine, achieving nanomolar sensitivity and robust repeatability through synergistic enhancement of conductivity and active surface area. In addition, advances in hybrid carbonaceous and metal/metal-oxide nanoparticle architectures have been reported to improve biosensor performance for clinical diagnostics, with tunable surface chemistry and pore structures enabling high selectivity and rapid electron transfer for diverse target analytes.

Electrochemical Sensing Techniques for Biomedical Applications publication trend

The graph below shows the total number of articles in electrochemical sensing techniques for biomedical applications across all publications each year (not limited to Nature Index journals).

Technical terms

Amperometry: A technique measuring current at a fixed potential, proportional to analyte concentration during oxidation or reduction reactions.

Voltammetry: Electrochemical methods (e.g., cyclic, square-wave) that record current as a function of applied potential to characterise redox behaviour.

Screen-printed electrode (SPE): A low-cost, disposable electrode platform formed by printing conductive inks onto a substrate for easy sensor fabrication.

Nanocomposite: A hybrid material combining nanoscale constituents (e.g., carbon nanosheets and nanoparticles) to enhance electrical and catalytic properties.

Limit of detection (LOD): The smallest quantity of an analyte that can be reliably distinguished from background noise under defined conditions.

References

1. A Portable Wireless Intelligent Nanosensor for 6,7-Dihydroxycoumarin Analysis with A Black Phosphorene and Nano-Diamond Nanocomposite-Modified Electrode. Biosensors (2023).
2. TiO2-MXene/PEDOT:PSS Composite as a Novel Electrochemical Sensing Platform for Sensitive Detection of Baicalein. Molecules (2023).
3. Innovative Carbonaceous Materials and Metal/Metal Oxide Nanoparticles for Electrochemical Biosensor Applications. Nanomaterials (2024).