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Abstract: In this work, a colorimetric molecularly imprinted polymer sensor has been developed for the sensitive and selective detection of bisphenol A (BPA). The Pd/Fe3O4@C peroxidase mimetics was prepared in situ growth of Pd nanoparticles on Fe3O4@C magnetic nanoparticles. Molecularly imprinted polymers (MIPs) capped with Pd/Fe3O4@C peroxidase mimetics was introduced into microfluidic paper-based analytical devices (μ-PADs) using polystyrene photonic crystal template as precursor, acrylamide (AA) as the functional monomer, ethylene glycol dimethacrylate (EGDMA) as the cross linker and benzoin ethyl ether (BEE) as photosensitizer under the irradiation of ultraviolet light. After removal of templates, the 3,3',5,5'-tetramethylbenzidine (TMB) chromogenic substrates were exposed to the Pd/Fe3O4@C peroxidase mimetics that could be catalyzed chromogenic reactions and showed different colors with respective intensity. At optimal conditions, this colorimetric molecularly imprinted polymer sensor can detect BPA at the concentration of nanomolar level. This approach provided a powerful protocol for simple, low-cost, rapid, and high-throughput detection of hazardous materials in real samples with satisfactory results for clinical diagnosis and environmental monitoring
Template and target information: bisphenol A, BPA