Abstract
| Lingua originale | English |
|---|---|
| Numero di pagine | 6 |
| Rivista | Journal of Nanoparticle Research |
| Volume | 19 |
| Stato di pubblicazione | Published - 2017 |
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All Science Journal Classification (ASJC) codes
- Bioengineering
- Atomic and Molecular Physics, and Optics
- Chemistry(all)
- Modelling and Simulation
- Materials Science(all)
- Condensed Matter Physics
Cita questo
Nitrogen-doped carbon dots embedded in a SiO2 monolith for solid-state fluorescent detection of Cu2+ ions. / Cannas, Marco; Agnello, Simonpietro; Gelardi, Franco Mario; Sciortino, Luisa; Messina, Fabrizio; Buscarino, Gianpiero.
In: Journal of Nanoparticle Research, Vol. 19, 2017.Risultato della ricerca: Article
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TY - JOUR
T1 - Nitrogen-doped carbon dots embedded in a SiO2 monolith for solid-state fluorescent detection of Cu2+ ions
AU - Cannas, Marco
AU - Agnello, Simonpietro
AU - Gelardi, Franco Mario
AU - Sciortino, Luisa
AU - Messina, Fabrizio
AU - Buscarino, Gianpiero
PY - 2017
Y1 - 2017
N2 - We describe the simple fabrication of SiO2 sol-gel monoliths embedding highly luminescent carbon nanodots (CDs) sensitive to metal ions. The pristine CDs we synthesize display an intense dual emission consisting in two fluorescence bands in the green and violet region, and we demonstrate that this photoluminescence is substantially unchanged when the dots are incorporated in the SiO2 matrix. The emission of these CDs is quenched by interactions with Cu2+ ions, which can be used to detect these ions with a detection limit of 1 μM. The chromophores remain accessible to diffusing Cu2+ ions even after embedding CDs in the sol-gel monolith, where their detection capabilities are preserved. Such a result provides the proof-of-principle of a new sensing scheme, where CDs are exploited as active sensing centers of metal transition ions within a solid-state device. The different interaction mechanisms of CDs with copper, in liquid and solid phase, are analyzed in detail and discussed in terms of different accessibility of their chromophores when the dots are incorporated in the SiO2 matrix.
AB - We describe the simple fabrication of SiO2 sol-gel monoliths embedding highly luminescent carbon nanodots (CDs) sensitive to metal ions. The pristine CDs we synthesize display an intense dual emission consisting in two fluorescence bands in the green and violet region, and we demonstrate that this photoluminescence is substantially unchanged when the dots are incorporated in the SiO2 matrix. The emission of these CDs is quenched by interactions with Cu2+ ions, which can be used to detect these ions with a detection limit of 1 μM. The chromophores remain accessible to diffusing Cu2+ ions even after embedding CDs in the sol-gel monolith, where their detection capabilities are preserved. Such a result provides the proof-of-principle of a new sensing scheme, where CDs are exploited as active sensing centers of metal transition ions within a solid-state device. The different interaction mechanisms of CDs with copper, in liquid and solid phase, are analyzed in detail and discussed in terms of different accessibility of their chromophores when the dots are incorporated in the SiO2 matrix.
KW - Carbon dots; Functional materials; Photoluminescence; Ratiometric sensor; Sensor; Bioengineering; Atomic and Molecular Physics
KW - and Optics; Chemistry (all); Modeling and Simulation; Materials Science (all); Condensed Matter Physics
UR - http://hdl.handle.net/10447/288454
M3 - Article
VL - 19
JO - Journal of Nanoparticle Research
JF - Journal of Nanoparticle Research
SN - 1388-0764
ER -