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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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 goldâsilver 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, methacryloylamidoantipyrineâterbium ((MAAP)2âTb(III)) has been used as a new metal-chelating monomer via metal coordinationâchelation 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 goldâsilver 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 1.43Â ÃÂ 104 and 9.1Â ÃÂ 106Â molÂ Lâ1.
|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
|Deposited On:||02 Aug 2010 17:20|
|Last Modified:||02 Aug 2010 17:20|
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