A novel type of graphene-like nanoparticle, synthesized by oxidation and unfolding of C60buckminsterfullerene 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 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 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. 2018 by the authors.

Ciotta, E., Prosposito, P., Tagliatesta, P., Lorecchio, C., Stella, L., Kaciulis, S., et al. (2018). Discriminating between different heavy metal ions with fullerene-derived nanoparticles. SENSORS, 18(5), 1496 [10.3390/s18051496].

Discriminating between different heavy metal ions with fullerene-derived nanoparticles

Prosposito, Paolo;Tagliatesta, Pietro;Lorecchio, Chiara;Stella, Lorenzo;Soltani, Peiman;Pizzoferrato, Roberto
2018

Abstract

A novel type of graphene-like nanoparticle, synthesized by oxidation and unfolding of C60buckminsterfullerene 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 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 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. 2018 by the authors.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/01 - Fisica Sperimentale
Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin)
Settore FIS/03 - Fisica della Materia
English
Carbon nanoparticles; Fluorescence quenching; Fluorescence turn-on; Heavy metals; Metal complexation; Optical sensors; Analytical Chemistry; Atomic and Molecular Physics, and Optics; Biochemistry; Instrumentation; Electrical and Electronic Engineering
http://www.mdpi.com/1424-8220/18/5/1496/pdf
Ciotta, E., Prosposito, P., Tagliatesta, P., Lorecchio, C., Stella, L., Kaciulis, S., et al. (2018). Discriminating between different heavy metal ions with fullerene-derived nanoparticles. SENSORS, 18(5), 1496 [10.3390/s18051496].
Ciotta, E; Prosposito, P; Tagliatesta, P; Lorecchio, C; Stella, L; Kaciulis, S; Soltani, P; Placidi, E; Pizzoferrato, R
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/205142
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