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The authors describe a rationally designed nanoprobe for the fluorometric determination of lysine. It is based on a ternary complex consisting of graphene oxide, aluminum ions (acting as a bridging agent), and alizarin red (GO-Al-AR). The fluorescence of the complex (with excitation/emission maxima at 440/512 nm) is weak but significantly enhanced upon the addition of lysine, probably due to a photoinduced...
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