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Highly Sensitive Dopamine Electrochemical Sensor Using Pt Nanoparticles on CNTs/Polypyrrole Nanocomposites

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This study demonstrates a highly selective electrochemical sensor for dopamine, highlighting its potential for biomedical applications.

The sensor shows a high sensitivity of 3.45 µA µM −1 cm −2 for dopamine detection in complex matrices.
Electrochemical studies indicate that dopamine oxidation on the nanocomposite follows adsorption-controlled kinetics, with a rate constant of 8.37 s −1.
The platinum nanoparticle-decorated carbon nanotubes/polypyrrole composite effectively eliminates interference from coexisting biomolecules.
Recovery rates in pharmaceutical formulations range from 96.72% to 101.40%, showcasing the sensor's reliability.

Nayem et al. (2025) studied this question.

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