Fluorescence quenching 2 Ion detection Ions 2 Agricultural wastes 1 Agriculture 1 Biocompatibility 1 Biological cells 1 Carbon 1 Carbon dots 1 Cell imaging 1 Cell proliferation 1 Chloride ion (cl-) 1 Chloride ions 1 Chlorine compounds 1 Cl- ions 1 Cystic fbrosis 1 Cystic fibrosis 1 Derived carbons 1 Detection 1 Detection cells 1 Fe 3+ 1 Graphene 1 Graphene quantum dot 1 Ion chromatography 1 Ion exchange 1 Iron 1 Living organisms 1 Nanocrystals 1 Nanostructured materials 1 Optical bio-sensors 1