Sensing of Transition Metals by Top-Down Carbon Dots

Carbon quantum dots (CQDs) are a new class of carbon-rich materials with a range of unique optical and structural properties. They can be defined as carbon nanoparticles, with sizes in the range of 1–10 nm, displaying absorption and emission activities in the UV-VIS range. Depending on the structure...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Federico Bruno, Alice Sciortino, Gianpiero Buscarino, Marco Cannas, Franco Mario Gelardi, Fabrizio Messina, Simonpietro Agnello
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	carbon dots sensing fluorescence Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/974e7d3cae9d41fa84b58c762845b1a6
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:974e7d3cae9d41fa84b58c762845b1a6
record_format	dspace
spelling	oai:doaj.org-article:974e7d3cae9d41fa84b58c762845b1a62021-11-11T15:23:45ZSensing of Transition Metals by Top-Down Carbon Dots10.3390/app1121103602076-3417https://doaj.org/article/974e7d3cae9d41fa84b58c762845b1a62021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/10360https://doaj.org/toc/2076-3417Carbon quantum dots (CQDs) are a new class of carbon-rich materials with a range of unique optical and structural properties. They can be defined as carbon nanoparticles, with sizes in the range of 1–10 nm, displaying absorption and emission activities in the UV-VIS range. Depending on the structure, CQDs display a wide variability of properties, which provides the possibility of finely tuning them for several applications. The great advantages of CQDs are certainly the ease of synthesis, non-toxicity, and the strong interactions with the surrounding environment. Based on this, CQDs are especially promising as selective chemosensors. The present study reports on carbon quantum dots synthesized with a top-down (TD) approach, and characterized by different optical, spectroscopic, and morphological techniques to identify the selectivity for metal ions belonging to the first transition series. In particular, the study focuses on the interaction between two samples, namely TD and TDA, featuring different surface functionalization, and heavy metal ions. Their sensing towards Co<sup>2+</sup>, Cu<sup>2+</sup>, Fe<sup>3+</sup>, Zn<sup>2+</sup>, and Ni<sup>2+</sup> has been tested by fluorescence (PL), steady state absorption spectroscopy, and time-resolved PL spectroscopy, in order to determine the fluorescence quenching. We found a PL quenching in the presence of concentrations of metal salts starting from 0.5 µM, and a selectivity towards the interacting ions, depending on CQDs’ surface features paving the way for their use for sensing.Federico BrunoAlice SciortinoGianpiero BuscarinoMarco CannasFranco Mario GelardiFabrizio MessinaSimonpietro AgnelloMDPI AGarticlecarbon dotssensingfluorescenceTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10360, p 10360 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	carbon dots sensing fluorescence Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	carbon dots sensing fluorescence Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Federico Bruno Alice Sciortino Gianpiero Buscarino Marco Cannas Franco Mario Gelardi Fabrizio Messina Simonpietro Agnello Sensing of Transition Metals by Top-Down Carbon Dots
description	Carbon quantum dots (CQDs) are a new class of carbon-rich materials with a range of unique optical and structural properties. They can be defined as carbon nanoparticles, with sizes in the range of 1–10 nm, displaying absorption and emission activities in the UV-VIS range. Depending on the structure, CQDs display a wide variability of properties, which provides the possibility of finely tuning them for several applications. The great advantages of CQDs are certainly the ease of synthesis, non-toxicity, and the strong interactions with the surrounding environment. Based on this, CQDs are especially promising as selective chemosensors. The present study reports on carbon quantum dots synthesized with a top-down (TD) approach, and characterized by different optical, spectroscopic, and morphological techniques to identify the selectivity for metal ions belonging to the first transition series. In particular, the study focuses on the interaction between two samples, namely TD and TDA, featuring different surface functionalization, and heavy metal ions. Their sensing towards Co<sup>2+</sup>, Cu<sup>2+</sup>, Fe<sup>3+</sup>, Zn<sup>2+</sup>, and Ni<sup>2+</sup> has been tested by fluorescence (PL), steady state absorption spectroscopy, and time-resolved PL spectroscopy, in order to determine the fluorescence quenching. We found a PL quenching in the presence of concentrations of metal salts starting from 0.5 µM, and a selectivity towards the interacting ions, depending on CQDs’ surface features paving the way for their use for sensing.
format	article
author	Federico Bruno Alice Sciortino Gianpiero Buscarino Marco Cannas Franco Mario Gelardi Fabrizio Messina Simonpietro Agnello
author_facet	Federico Bruno Alice Sciortino Gianpiero Buscarino Marco Cannas Franco Mario Gelardi Fabrizio Messina Simonpietro Agnello
author_sort	Federico Bruno
title	Sensing of Transition Metals by Top-Down Carbon Dots
title_short	Sensing of Transition Metals by Top-Down Carbon Dots
title_full	Sensing of Transition Metals by Top-Down Carbon Dots
title_fullStr	Sensing of Transition Metals by Top-Down Carbon Dots
title_full_unstemmed	Sensing of Transition Metals by Top-Down Carbon Dots
title_sort	sensing of transition metals by top-down carbon dots
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/974e7d3cae9d41fa84b58c762845b1a6
work_keys_str_mv	AT federicobruno sensingoftransitionmetalsbytopdowncarbondots AT alicesciortino sensingoftransitionmetalsbytopdowncarbondots AT gianpierobuscarino sensingoftransitionmetalsbytopdowncarbondots AT marcocannas sensingoftransitionmetalsbytopdowncarbondots AT francomariogelardi sensingoftransitionmetalsbytopdowncarbondots AT fabriziomessina sensingoftransitionmetalsbytopdowncarbondots AT simonpietroagnello sensingoftransitionmetalsbytopdowncarbondots
_version_	1718435379540918272

Sensing of Transition Metals by Top-Down Carbon Dots

Ejemplares similares