One-Step Laser Nanostructuration of Reduced Graphene Oxide Films Embedding Metal Nanoparticles for Sensing Applications
Scroccarello, Annalisa (Institut Català de Nanociència i Nanotecnologia)
Álvarez Diduk, Ruslan (Institut Català de Nanociència i Nanotecnologia)
Della Pelle, Flavio (University of Teramo. Department of Bioscience and Technology for Food, Agriculture and Environment)
De Carvalho Castro Silva, Cecilia (Institut Català de Nanociència i Nanotecnologia)
Idili, Andrea (Institut Català de Nanociència i Nanotecnologia)
Parolo, Claudio (Institut Català de Nanociència i Nanotecnologia)
Compagnone, Dario (University of Teramo. Department of Bioscience and Technology for Food, Agriculture and Environment)
Merkoçi, Arben (Institut Català de Nanociència i Nanotecnologia)

Data:	2023
Resum:	The combination of two-dimensional materials and metal nanoparticles (MNPs) allows the fabrication of novel nanocomposites with unique physical/chemical properties exploitable in high-performance smart devices and biosensing strategies. Current methods to obtain graphene-based films decorated with noble MNPs are cumbersome, poorly reproducible, and difficult to scale up. Herein, we propose a straightforward, versatile, surfactant-free, and single-step technique to produce reduced graphene oxide (rGO) conductive films integrating "naked" noble MNPs. This method relies on the instantaneous laser-induced co-reduction of graphene oxide and metal cations, resulting in highly exfoliated rGO nanosheets embedding gold, silver, and platinum NPs. The production procedure has been optimized, and the obtained nanomaterials are fully characterized; the hybrid nanosheets have been easily transferred onto lab-made screen-printed electrodes preserving their nanoarchitecture. The Au@rGO-, Ag@rGO-, and Pt@rGO-based electrodes have been challenged to detect caffeic acid, nitrite, and hydrogen peroxide in model solutions and real samples. The sensors yielded quantitative responses (R 2 ≥ 0. 997) with sub-micromolar limits of detections (LODs ≤ 0. 6 μM) for all the analytes, allowing accurate quantification in samples (recoveries ≥ 90%; RSD ≤ 14. 8%, n = 3). This single-step protocol which requires low cost and minimal equipment will allow the fabrication of free-standing, MNP-embedded rGO films integrable into a variety of scalable smart devices and biosensors.
Ajuts:	European Commission 881603 Agencia Estatal de Investigación PID2021-124795NB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca SEV-2017-0706
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Laser reduced graphene oxide ; IR-laser ; Nanodecoration ; Micropatterning ; Hybrid nanomaterials ; Surfactant-free ; Electrochemical sensor
Publicat a:	ACS Sensors, Vol. 8, Issue 2 (February 2023) , p. 598-609, ISSN 2379-3694

DOI: 10.1021/acssensors.2c01782
PMID: 36734274

12 p, 5.6 MB

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