ArticleMikrochimica acta2026
Self-powered photofuel cell aptasensing platform based on heterostructural In
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 novel self-powered aptasensor, based on an In2O3-MgIn2S4 (IO-MIS) heterostructural photoanode and operating on a photofuel cell (PFC) system, was constructed for the specific detection of atrazine (ATZ). Constructed from MOF-derived In2O3 hollow tubulars (HTs), the IO-MIS photoanode featured a roughened surface while preserving the original hollow structure after the loading of nanoflower-shaped MgIn2S4. Owing to its superior morphology and the matched energy levels of In2O3 and MgIn2S4, the photoanode achieved improved photo-generated carrier separation, which in turn elevated the overall PFC performance. A promising PFC sensing platform with enhanced output power was constructed, which obviated the requirement for additional sacrificial agents and external bias under visible light illumination. Taking advantage of excellent output performance, PFC with the IO-MIS photoanode was used for the immobilization of ATZ-aptamers as specific recognition elements. The aptamer-mediated efficient capture of target ATZ molecules endowed the sensor with remarkable sensitivity and selectivity in ATZ detection. The PFC aptasensor achieved a linear response range of 5 × 10− 2-5 × 105 pmol/L and a low detection limit (S/N = 3) of 0.04 pmol/L under optimal conditions. The aptasensing platform demonstrated outstanding reproducibility, specificity, and stability, highlighting its potential for rapid and high-sensitivity environmental monitoring.
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