ArticleAnalytical chemistry2026
Microwave-Assisted One-Pot Synthesis of Medium-Entropy Oxides for Dual-Mode Electrochemical and Colorimetric Analysis of Sweat Biomarkers.
Article in Analytical chemistry, 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
Enzyme-mimicking nanomaterials (nanozymes) promise robust alternatives to biological catalysts for continuous health monitoring, yet achieving sufficient catalytic activity remains challenging. Here, multimetallic medium-entropy oxide (MEO) nanoparticles incorporating five transition metals (Fe, Co, Mn, Ni, Cu) demonstrate exceptional dual-mode biosensing capabilities. A facile, one-pot microwave-assisted synthesis process yields nanoparticles (12 nm diameter, configurational entropy of 1.41 R) with abundant oxygen vacancies and mixed-valence states that serve as highly active catalytic centers. When integrated with graphene oxide, the MEO creates a robust platform for nonenzymatic electrochemical detection of the stress hormone cortisol, achieving a low limit of detection (LOD) of 1.9 nM and a high sensitivity of 46.5 ± 1.9 μA μM
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