Nano Archive

Nanosensors having dipicolinic acid imprinted nanoshell for Bacillus cereus spores detection

Gültekin, Aytaç and Gültekin, Arzu and Sarıözlü, Nalan Yılmaz and Denizli, Adil and Say, Rıdvan (2010) Nanosensors having dipicolinic acid imprinted nanoshell for Bacillus cereus spores detection. Journal of Nanoparticle Research, 12 (6). pp. 2069-2079.

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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 (Kaffinity) determined were found to be 1.43 × 104 and 9.1 × 106 mol L−1.

Item Type:Article
Uncontrolled Keywords:Gold–silver nanoclusters sensor - Molecularly imprinted polymers - Dipicolinic acid - Bacillus cereus spores recognition - Photoluminescence
Subjects:Analytical Science > Nanotechnology for sensing and actuating
Biomedical Science > Nanotechnology for human health
Biomedical Science > Nanomedicine
ID Code:9462
Deposited By:SPI
Deposited On:02 Aug 2010 17:20
Last Modified:02 Aug 2010 17:20

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