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Reference type: Journal
Authors: Liu HL, Zhou KW, Chen XM, Wang J, Wang S, Sun BG
Article Title: Graphene oxide-sensitized molecularly imprinted opto-polymers for charge-transfer fluorescent sensing of cyanoguanidine.
Publication date: 2017
Journal: Food Chemistry
Volume: 235
Page numbers: 14-20.
DOI: 10.1016/j.foodchem.2017.05.036
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0308814617308130

Abstract: The hierarchical structuring of materials offers exciting opportunities to construct functional sensors. Multiple processes were combined to create complex materials for the selective detection of cyanoguanidine (CYA) using graphene oxide-sensitized molecularly imprinted opto-polymers (MIOP). Molecular imprinting was used to construct molecular-scale analyte-selective cavities, graphene oxide was introduced to provide a platform for the polymerization, and increase the stability and binding kinetic properties, and 3-methacryloxy propyl trimethoxy silane-modified quantum dots were combined with a functional monomer to increase the fluorescence quantum yield. Polymer cross-linking and fluorescence intensity were optimized for molecular recognition and opto-sensing detection. Selective and sensitive, fluorescence sensing of CYA was possible at concentrations as low as to 1.6 μM. It could be applied to the rapid and cost-effective monitoring of CYA in infant formula. The approach is generic and applicable to many molecules and conventional opto-sensors, based on molecularly imprinted polymer formulations, individually or in multiplexed arrays
Template and target information: cyanoguanidine, CYA
Author keywords: Molecularly imprinted opto-polymers, Graphene, Quantum dots, Cyanoguanidine, Infant formula


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