Abstract
This work reports a technique for the stabilization after storage in air of a lipid film based biosensor for atenolol. Microporous filters composed of glass fibers (nominal pore sizes 0.7 and 1.0 μm) were used as supports for the formation and stabilization of these devices. The lipid film is formed on the filter by polymerization prior to its use. Methacrylic acid was the functional monomer, ethylene glycol dimethacrylate was the crosslinker and 2,2′-azobis-(2-methylpropionitrile) was the initiator. The method for preparation of stabilized lipid film biosensor is studied throughout this work. The response towards atenolol of these stabilized lipid membrane biosensor, for repetitive use, composed of phosphatidylcholine was compared with planar freely suspended bilayer lipid membranes (BLMs). The stabilized lipid membranes provided similar artificial ion gating events as BLMs in the form of transient signals and can function for repetitive uses after storage in air. This will allow the practical use of the techniques for chemical sensing based on lipid films and commercialization of these devices.
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