Browsing by Author "Bridge, Kerry"
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Item Open Access Electrochromic effects from a simple commercial polymer membrane.(Elsevier Science B.V., Amsterdam., 2007-08-01T00:00:00Z) Davis, Frank; Law, Karen A.; Bridge, Kerry; Higson, Seamus P. J.A simple commercial polyester polymer membrane has been found to exhibit an intense electrochromic effect. Most polymers which undergo electrochromic effects contain either transition metals or extensive conjugated systems. We have found that a simple commercial polyester membrane when coated with gold and polarised to −4 V (versus Ag) in aprotic organic solvents displays an electrochromic colour change from a colourless to an intense red statItem Open Access Flexible Ultrathin PolyDVB/EVB Composite Membranes for the Optimization of a Lactate Sensor.(John Wiley & Sons, Ltd, 2007-01-01T00:00:00Z) Bridge, Kerry; Davis, Frank; Collyer, Stuart D.; Higson, Seamus P. J.An ultrathin composite membrane has been developed as the outer covering barrier in a model amperometric lactate oxidase enzyme electrode. The membrane was formed by cathodic electropolymerization of divinylbenzene/ethylvinylbenzene at the surface of a gold coated polyester support membrane. Permeability coefficients were determined for O2 and lactate across membranes with a range of polymer thicknesses. Anionic interferents (such as ascorbate) were screened from the working electrode by the composite membrane. The composite enzyme electrode showed an increased working concentration range and extended linearity of responses in comparison to an uncoated enzyme electrode.