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Le Borgne, B., Girard, A., Cardinaud, C., Salaun, A.-C., Pichon, L. & Geneste, F. (2018) Covalent functionalization of polycrystalline silicon nanoribbons applied to Pb(II) electrical detection. Sensors and Actuators B-Chemical, 268 368–375.
Added by: Richard Baschera (2018-07-17 08:58:08) Last edited by: Richard Baschera (2018-07-24 13:00:00) |
| Type de référence: Article DOI: 10.1016/j.snb.2018.04.138 Numéro d'identification (ISBN etc.): 0925-4005 Clé BibTeX: LeBorgne2018 Voir tous les détails bibliographiques  |
Catégories: PCM Créateurs: Cardinaud, Geneste, Girard, Le Borgne, Pichon, Salaun Collection: Sensors and Actuators B-Chemical |
Consultations : 1/444
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| Résumé |
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Although recent studies in the field of nanomaterials have allowed the realization of highly sensitive sensors, research regarding new types of functionalization of nanostructures to reach high selectivity are still missing. Here, a simple electronic device based on polycrystalline silicon (poly-Si) nanoribbons used for lead detection is presented. This device is functionalized by reduction of aryl diazonium salts in order to detect heavy metals. The effectiveness of the grafting process and thickness homogeneity of the coating layer were evaluated by XPS and NanoSIMS techniques. The preconcentration of lead (Pb2+) at the surface of the functionalized nanostructures was substantially verified. Finally, electrical characterization of the resistors based on the functionalized nanoribbons, showed that the sensitivity to these species is increased in the concentration ranging from 10(-7) to 10(-5) mol L-1. This technique could pave the way for use of complexing agents to enhance heavy metal detection. (C) 2018 Elsevier B.V. All rights reserved.
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