Abstract
| Lingua originale | English |
|---|---|
| pagine (da-a) | S258-S265 |
| Numero di pagine | 8 |
| Rivista | Materials Today: Proceedings |
| Volume | 3 |
| Stato di pubblicazione | Published - 2016 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
Cita questo
Photoluminescence of Carbon Dots Embedded in a SiO2 Matrix. / Gelardi, Franco Mario; Cannas, Marco; Agnello, Simonpietro; Buscarino, Gianpiero; Messina, Fabrizio; Sciortino, Luisa.
In: Materials Today: Proceedings, Vol. 3, 2016, pag. S258-S265.Risultato della ricerca: Article
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TY - JOUR
T1 - Photoluminescence of Carbon Dots Embedded in a SiO2 Matrix
AU - Gelardi, Franco Mario
AU - Cannas, Marco
AU - Agnello, Simonpietro
AU - Buscarino, Gianpiero
AU - Messina, Fabrizio
AU - Sciortino, Luisa
PY - 2016
Y1 - 2016
N2 - We synthetized carbon dots by a pyrolitic method, and studied their photoluminescence in aqueous environment and upon trapping in a solid matrix. To this aim, we devised a facile procedure allowing to embed the dots in amorphous SiO2, without the need of any pre-functionalization of the nanoparticles, and capable of yielding a brightly photoluminescent monolith. Experimental data reveal a remarkable similarity between the emission properties of carbon dots in water and in SiO2, suggesting that the chromophores responsible of the photoluminescence undergo only weak interactions with the environment. Time-resolved photoluminescence data reveal that the typical photoluminescence tunability of these dots mostly arises, in the present case, from the co-existence of two independent emission bands. These two signals have different emission peak positions (2.8-2.9 and 2.2-2.3 eV respectively) and decay lifetimes (7.0 and 9.0 ns respectively), while their intensity ratio is controlled by the excitation wavelength.
AB - We synthetized carbon dots by a pyrolitic method, and studied their photoluminescence in aqueous environment and upon trapping in a solid matrix. To this aim, we devised a facile procedure allowing to embed the dots in amorphous SiO2, without the need of any pre-functionalization of the nanoparticles, and capable of yielding a brightly photoluminescent monolith. Experimental data reveal a remarkable similarity between the emission properties of carbon dots in water and in SiO2, suggesting that the chromophores responsible of the photoluminescence undergo only weak interactions with the environment. Time-resolved photoluminescence data reveal that the typical photoluminescence tunability of these dots mostly arises, in the present case, from the co-existence of two independent emission bands. These two signals have different emission peak positions (2.8-2.9 and 2.2-2.3 eV respectively) and decay lifetimes (7.0 and 9.0 ns respectively), while their intensity ratio is controlled by the excitation wavelength.
KW - Carbon dots; Photoluminescent nanocarbons; Photoluminescent silica monolith; Time-resolved photoluminescence; Materials Science (all)
UR - http://hdl.handle.net/10447/179375
UR - http://www.journals.elsevier.com/materials-today-proceedings/
M3 - Article
VL - 3
SP - S258-S265
JO - Materials Today: Proceedings
JF - Materials Today: Proceedings
SN - 2214-7853
ER -