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A smartphone-assisted ratiometric colorimetric and fluorescent probe for triple-mode determination of nitrite based on MnO2 nanoparticles and carbon quantum dots

Materials ScienceEngineeringNanomaterialsNanotechnologyChemical SensorChemistrySmartphone-assisted Ratiometric ColorimetricNanosensorCation SensingMno2 NanoparticlesCarbon Quantum Dots