ArticleMikrochimica acta2026
Facile construction of 3D pyramidal Cu nanoparticles on indium tin oxide: a simple and sensitive platform for methadone monitoring in biological samples.
Article in Mikrochimica acta, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
A platform is presented based on electrosynthesis of pyramidal Cu nanoparticles (p-CuNPs), in a three-dimensional structure on an indium tin oxide (ITO) electrode. The electrochemical sensing utility of this structure was evaluated for detection of methadone. A key advantage of current approach is the ultra-fast synthesis of the p-CuNPs on the ITO, which is accomplished in only 120 s. The SEM images showed that the p-CuNPs were arranged in cubic blocks to form 3D Cu pyramids on the ITO electrode substrate named p-CuNPs/ITO electrode. In optimal condition, the p-CuNPs expose a wider area, effective mass transport, and more electroactive sites for the interaction of the target analyte that improved the current signals: a ~ 6072-fold increase compared to bare ITO and a 3.3-fold enhancement over a metallic Cu plate. It was observed that the p-CuNPs/ITO sensor platforms exhibit a linear response over a concentration range from 0.005 to 120 μM methadone, with a detection limit of 1.4 nM. The sensor selectivity was investigated across a wide range of drugs and biological compounds, and the sensor showed high selectivity for detecting methadone. The detection of methadone in urine and blood samples with excellent recoveries confirms exceptional response of the sensor in biological assays.
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