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A Sensitive Biosensor for Bisphenol A Based on a Graphene–Poly–L–Lysine/Tyrosinase Biocomposite Film Electrode

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Graphene–poly–L–lysine nanosheets (Gr–PLL) were synthesized and fully characterized. Tyrosinase was immobilized on the Gr–PLL nanosheets modified glassy carbon electrode which was employed as an amperometric biosensor for bisphenol A. The obtained biosensor was characterized with scanning electron microscopy and electrochemical impedance spectroscopy. Experimental conditions on the sensing performance of the as-prepared biosensor were investigated. The biosensor displayed a linear response to bisphenol A over a concentration range which spanned from 0.02 μM to 8.0 μM with a detection limit of 0.01 μM (S/N = 3). The biosensor was successfully applied to determine trace amounts of bisphenol A leaching from plastic drinking bottles.
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Document Type: Short Communication

Publication date: April 1, 2014

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  • Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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