Electrochemical Sensing and Analytical Applications

Electrochemical sensing harnesses the interplay between chemical reactions and electrical signals to detect a wide range of analytes with high sensitivity, selectivity and rapid response. Advances in electrode materials—such as carbon‐based substrates, metal oxides, conducting polymers and nanocomposites—have greatly enhanced the surface area, electron‐transfer kinetics and catalytic activity of sensing platforms. Techniques including cyclic voltammetry, differential pulse voltammetry and square‐wave voltammetry enable quantitative analysis in environmental monitoring, clinical diagnostics, food safety and pharmaceutical quality control. Integration with portable and miniaturised devices has extended applications to point‐of‐care testing and in situ real‐time measurements, underscoring the global importance of electrochemical methodologies in addressing analytical challenges.

Research from Nature Portfolio

Recent studies have explored tailored carbon‐nanotube electrodes modified with organic dyes to achieve simultaneous detection of pharmaceutical compounds. In one investigation, a layered poly(thiazole yellow‐G) film on multi‐walled carbon nanotube paste electrode facilitated the clear separation and quantification of formoterol fumarate in the presence of uric acid. Characterisation by electrochemical impedance spectroscopy and microscopy confirmed an increased density of active sites, yielding a linear detection range in the low micromolar domain and limits of detection approaching 10 nanomolar. The work demonstrated fast electron transfer and robust stability, offering a blueprint for multi‐analyte sensing in complex biological matrices.

Electrochemical Sensing and Analytical Applications publication trend

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

Technical terms

Cyclic voltammetry: An electroanalytical technique in which the potential of a working electrode is swept linearly back and forth while measuring the resulting current to characterise redox processes.

Limit of detection (LOD): The lowest concentration of an analyte that can be distinguished from background noise with a defined level of confidence, typically expressed in molar units.

Carbon paste electrode (CPE): A composite electrode comprising graphite powder and a binder (e.g. oil), valued for ease of modification with nanomaterials and reproducible surface renewal.

Graphene oxide (GO): A single‐layer carbon material bearing oxygenated functional groups, used to improve dispersion, surface area and electron‐transfer properties in composite sensors.

Electrocatalysis: The acceleration of an electrochemical reaction at an electrode surface by a catalyst, often leading to enhanced sensitivity and lower overpotentials.

References

1. Electro-oxidation of formoterol fumarate on the surface of novel poly(thiazole yellow-G) layered multi-walled carbon nanotube paste electrode. Scientific Reports (2021).
2. An Electrochemical Electrode to Detect Theophylline Based on Copper Oxide Nanoparticles Composited with Graphene Oxide. Micromachines (2022).
3. Detection of Imatinib Based on Electrochemical Sensor Constructed Using Biosynthesized Graphene-Silver Nanocomposite. Frontiers in Chemistry (2021).
4. Titanium nanoparticles (TiO 2 )/graphene oxide nanosheets (GO). Analyst (2017).