Titolo:  Silicon-based fluorescent platforms for copper(ii) detection in water
Data di pubblicazione:  2021
Data di prima pubblicazione on-line:  2021
Autori:  Oggianu, M.; Figus, C.; Ashoka-Sahadevan, S.; Monni, N.; Marongiu, D.; Saba, M.; Mura, A.; Bongiovanni, G.; Caltagirone, C.; Lippolis, V.; Cannas, C.; Cadoni, E.; Mercuri, M. L.; Quochi, F.
Numero degli autori:  14
Lingua:  Inglese
Presenza coautori internazionali: 
Volume:  11
Fascicolo:  26
Pagina iniziale:  15557
Pagina finale:  15564
Numero di pagine:  8
Digital Object Identifier (DOI):  http://dx.doi.org/10.1039/d1ra02695j
Codice identificativo Scopus:  2-s2.0-85105715716
Codice identificativo ISI:  WOS:000649193500007
Abstract:  The potential of silicon-based fluorescent platforms for the detection of trace toxic metal ions was investigated in an aqueous environment. To this aim, silicon chips were first functionalized with amino groups, and fluorescein organic dyes, used as sensing molecules, were then covalently linked to the surface via formation of thiourea groups. The obtained hybrid heterostructures exhibited high sensitivity and selectivity towards copper(ii), a limit of detection compatible with the recommended upper limits for copper in drinking water, and good reversibility using a standard metal-chelating agent. The fluorophore-analyte interaction mechanism at the basis of the reported fluorescence quenching, as well as the potential of performance improvement, were also studied. The herein presented sensing architecture allows, in principle, tailoring of the selectivity towards other metal ions by proper fluorophore selection, and provides a favorable outlook for integration of fluorescent chemosensors with silicon photonics technology.
Parole chiave:  chelation; fluorescence; fluorophores; metal ions; metals; potable water; quenching; silicon photonics; trace elements
Tipologia: 1.1 Articolo in rivista

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