Discriminating between Different Heavy Metal Ions with Fullerene-Derived Nanoparticles

Discriminating between Different Heavy Metal Ions with Fullerene-Derived Nanoparticles

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A novel type of graphene-like nanoparticle, synthesized by oxidation and unfolding of C60 buckminsterfullerene fullerene, showed multiple and reproducible sensitivity to Cu2+, Pb2+, Cd2+, and As(III) through different degrees of fluorescence quenching or, in the case of Cd2+, through a remarkable fluorescence enhancement.Most importantly, only for Cu2+ and Water Jug Lid Cap Pb2+, the fluorescence intensity variations came with distinct modifications of the optical absorption spectrum.Time-resolved fluorescence study confirmed that the common origin of these diverse behaviors lies in complexation of the metal ions by fullerene-derived carbon layers, even though further studies are required for a complete explanation of the involved processes.Nonetheless, the different response of fluorescence and optical absorbance towards distinct cationic species makes it possible to discriminate Rangehood Vent Elbow Bend between the presence of Cu2+, Pb2+, Cd2+, and As(III), through two simple optical measurements.To this end, the use of a three-dimensional calibration plot is discussed.

This property makes fullerene-derived nanoparticles a promising material in view of the implementation of a selective, colorimetric/fluorescent detection system.