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Reference type: Journal
Authors: Gültekin A, Ersöz A, Sariözlü NY, Denizli A, Say RI
Article Title: Nanosensors having dipicolinic acid imprinted nanoshell for Bacillus cereus spores detection.
Publication date: 2010
Journal: Journal of Nanoparticle Research
Volume: 12
Issue: (6)
Page numbers: 2069-2079.
DOI: 10.1007/s11051-009-9766-z
Alternative URL: https://www.researchgate.net/publication/225446259_Nanosensors_having_dipicolinic_acid_imprinted_nanoshell_for_Bacillus_cereus_spores_detection

Abstract: Abstract: Molecular imprinted polymers (MIPs) as a recognition element for sensors are increasingly of interest and MIP nanoclusters have started to appear in the literature. In this study, we have proposed a novel thiol ligand-capping method with polymerizable methacryloylamido-cysteine (MAC) attached to gold-silver nanoclusters, reminiscent of a self-assembled monolayer and have reconstructed surface shell by synthetic host polymers based on molecular imprinting method for recognition. In this method, methacryloylamidoantipyrine-terbium ((MAAP)2-Tb(III)) has been used as a new metal-chelating monomer via metal coordination-chelation interactions and dipicolinic acid (DPA) which is main participant of Bacillus cereus spores used as a model. Nanoshell sensors with templates give a cavity that is selective for DPA. The DPA can simultaneously chelate to Tb(III) metal ion and fit into the shape-selective cavity. Thus, the interaction between Tb(III) ion and free coordination spheres has an effect on the binding ability of the gold-silver nanoclusters nanosensor. The binding affinity of the DPA imprinted nanoclusters has been investigated by using the Langmuir and Scatchard methods, and the respective affinity constants (K affinity) determined were found to be 1.43 x 10^4 and 9.1 x 10^6 mol L-1
Template and target information: dipicolinic acid, DPA
Author keywords: Gold-silver nanoclusters sensor, Molecularly imprinted polymers, dipicolinic acid, Bacillus cereus spores recognition, Photoluminescence

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