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Polyaniline (PANI) grafted Graphene Oxide (GO), GO–PANI nanocomposite exhibits interesting pH dependent tunable photoluminescence. Exciting at 230nm, a single emission band at 345nm is observed and this band is shifted from UV to blue region by decreasing the pH less than 3. Aqueous dispersion of GO–PANI (pH=4.6) shows dual fluorescence at 345nm and 405nm upon excitation at 280nm indicating the presence...
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