Electrochemical Sensing with Nanoelectrode Arrays
Summary
Electrochemical sensing with nanoelectrode arrays exploits arrays of electrodes with dimensions in the nanometre range to achieve highly sensitive and rapid detection of chemical and biological analytes. Shrinking electrode size to the nanoscale enhances mass transport under steady-state diffusion conditions, reduces capacitive background currents and elevates faradaic signals relative to noise. Such advantages translate directly into lower limits of detection, faster response times and improved selectivity. Fabrication approaches span top-down techniques, including nanoimprint lithography and photolithography, as well as bottom-up assembly of nanomaterials such as carbon nanotubes or metal nanowires. Surface functionalisation with biorecognition elements—antibodies, enzymes or oligonucleotides—enables specific detection of targets ranging from viral RNA to environmental contaminants. Together, the interplay of nanoscale geometry, electrode chemistry and microfabrication underpins a versatile sensing platform with applications in point-of-care diagnostics, environmental monitoring, food safety and fundamental studies of single-molecule electrochemistry.
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Electrochemical Sensing with Nanoelectrode Arrays publication trend
The graph below shows the total number of articles in electrochemical sensing with nanoelectrode arrays across all publications each year (not limited to Nature Index journals).
Technical terms
Nanoelectrode array (NEA): An arrangement of electrodes with nanoscale dimensions offering enhanced mass transport and signal-to-noise characteristics.
Faradaic current: Electrical current arising from redox reactions occurring at the electrode surface.
Signal-to-noise ratio: The proportion of analytical signal to background noise, indicating measurement clarity and sensitivity.
Functionalisation: The chemical modification of electrode surfaces to attach specific biorecognition elements.
Voltammetry: An electrochemical technique in which the current response is measured while the electrode potential is varied systematically.
References
- The Cleanroom‐Free, Cheap, and Rapid Fabrication of Nanoelectrodes with Low zM Limits of Detection. Small (2023).
- Functional Nanomaterials Enhancing Electrochemical Biosensors as Smart Tools for Detecting Infectious Viral Diseases. Molecules (2023).
- Nanoimprinted arrays of glassy carbon nanoelectrodes for improved electrochemistry of enzymatic redox-mediators. Journal of Electroanalytical Chemistry (2023).
- Micro/Nano Electrode Array Sensors: Advances in Fabrication and Emerging Applications in Bioanalysis. Frontiers in Chemistry (2020).
- A systematic study of the influence of nanoelectrode dimensions on electrode performance and the implications for electroanalysis and sensing. Faraday Discussions (2013).
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