Dye-loaded polymeric nanoparticles (NPs) are promising bioimaging agents because of their available surface chemistry, high brightness, and tunable optical properties. However, dye loadings can cause the aggregation-caused quenching (ACQ) encapsulated fluorophores. Previously, we proposed to mitigate ACQ inside NPs by insulating cationic dyes with bulky hydrophobic counterions. In order impleme...

The present investigation highlights the synthesis of polyaniline (PANI)-coated graphene oxide doped with SrTiO3 nanocube nanocomposites through facile in situ oxidative polymerization method for the efficient removal of carcinogenic dyes, namely, the cationic dye methylene blue (MB) and the anionic dye methyl orange (MO). The presence of oxygenated functional groups comprised of hydroxyl and e...

Gold nanoparticles quench the fluorescence of cationic polyfluorene with Stern-Volmer constants (KSV) approaching 1011 M-1, several orders of magnitude larger than any previously reported conjugated polymer-quencher pair and 9-10 orders of magnitude larger than small molecule dye-quencher pairs. The dependence of KSV on ionic strength, charge and conjugation length of the polymer, and the dimen...