Next Article in Journal
Electrochemical Detection of E. coli O157:H7 in Water after Electrocatalytic and Ultraviolet Treatments Using a Polyguanine-Labeled Secondary Bead Sensor
Next Article in Special Issue
Effect of Surface Coverage of Gold Nanoparticles on the Refractive Index Sensitivity in Fiber-Optic Nanoplasmonic Sensing
Previous Article in Journal
Filament Advance Detection Sensor for Fused Deposition Modelling 3D Printers
Previous Article in Special Issue
Centrifugal Deposited Au-Pd Core-Shell Nanoparticle Film for Room-Temperature Optical Detection of Hydrogen Gas
Open AccessArticle

Discriminating between Different Heavy Metal Ions with Fullerene-Derived Nanoparticles

1
Department of Industrial Engineering, University of Rome Tor Vergata, 00133 Rome, Italy
2
INSTM and CiMER, University of Rome Tor Vergata, 00133 Rome, Italy
3
Department of Chemical Sciences and Technology, University of Rome Tor Vergata, 00133 Rome, Italy
4
Institute for the Study of Nanostructured Materials, CNR of Italy, Monterotondo Stazione, 00015 Rome, Italy
5
CNR—Istituto di Struttura della Materia, Via Fosso del Cavaliere 100, 00133 Roma, Italy
*
Author to whom correspondence should be addressed.
Sensors 2018, 18(5), 1496; https://doi.org/10.3390/s18051496
Received: 9 April 2018 / Revised: 7 May 2018 / Accepted: 8 May 2018 / Published: 10 May 2018
(This article belongs to the Special Issue Optical Chemical Nanosensors)
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 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. View Full-Text
Keywords: optical sensors; heavy metals; carbon nanoparticles; metal complexation; fluorescence quenching; fluorescence turn-on optical sensors; heavy metals; carbon nanoparticles; metal complexation; fluorescence quenching; fluorescence turn-on
Show Figures

Figure 1

MDPI and ACS Style

Ciotta, E.; Prosposito, P.; Tagliatesta, P.; Lorecchio, C.; Stella, L.; Kaciulis, S.; Soltani, P.; Placidi, E.; Pizzoferrato, R. Discriminating between Different Heavy Metal Ions with Fullerene-Derived Nanoparticles. Sensors 2018, 18, 1496.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop