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Mazzotta E, Di Giulio T, Mastronardi V, Brescia R, Pompa PP, Moglianetti M, Malitesta C. Nanozymes based on octahedral platinum nanocrystals with {111} surface facets: glucose oxidase mimicking activity in electrochemical sensors. Mikrochim Acta 2023; 190:425. [PMID: 37776360 PMCID: PMC10543470 DOI: 10.1007/s00604-023-05992-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 09/06/2023] [Indexed: 10/02/2023]
Abstract
The ability of shape-controlled octahedral Pt nanoparticles to act as nanozyme mimicking glucose oxidase enzyme is reported. Extended {111} particle surface facets coupled with a size comparable to natural enzymes and easy-to-remove citrate coating give high affinity for glucose, comparable to the enzyme as proven by the steady-state kinetics of glucose electrooxidation. The easy and thorough removal of the citrate coating, demonstrated by X-ray photoelectron spectroscopy analysis, allows a highly stable deposition of the nanozymes on the electrode. The glucose electrochemical detection (at -0.2 V vs SCE) shows a linear response between 0.36 and 17 mM with a limit of detection of 110 μM. A good reproducibility has been achieved, with an average relative standard deviation (RSD) value of 9.1% (n = 3). Similarly, a low intra-sensor variability has been observed, with a RSD of 6.6% (n = 3). Moreover, the sensor shows a long-term stability with reproducible performances for at least 2 months (RSD: 7.8%). Tests in saliva samples show the applicability of Pt nanozymes to commercial systems for non-invasive monitoring of hyperglycemia in saliva, with recoveries ranging from 92 to 98%.
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Affiliation(s)
- Elisabetta Mazzotta
- Laboratorio di Chimica Analitica, Dipartimento di Scienze e Tecnologie Biologiche e Ambientali (Di.S.Te.B.A.), Università del Salento, 73100, Lecce, Italy.
| | - Tiziano Di Giulio
- Laboratorio di Chimica Analitica, Dipartimento di Scienze e Tecnologie Biologiche e Ambientali (Di.S.Te.B.A.), Università del Salento, 73100, Lecce, Italy
| | - Valentina Mastronardi
- Istituto Italiano di Tecnologia, Nanobiointeractions & Nanodiagnostics, Via Morego 30, 16163, Genova, Italy
| | - Rosaria Brescia
- Electron Microscopy Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
| | - Pier Paolo Pompa
- Istituto Italiano di Tecnologia, Nanobiointeractions & Nanodiagnostics, Via Morego 30, 16163, Genova, Italy
| | - Mauro Moglianetti
- Istituto Italiano di Tecnologia, Nanobiointeractions & Nanodiagnostics, Via Morego 30, 16163, Genova, Italy.
- Istituto Italiano di Tecnologia, Centre for Cultural Heritage Technology (CCHT@Ca' Foscari), Via Torino 155, 30172, Venice, Italy.
- HiQ-Nano srl, Via Barsanti, 1, 73010, Arnesano (LE), Italy.
| | - Cosimino Malitesta
- Laboratorio di Chimica Analitica, Dipartimento di Scienze e Tecnologie Biologiche e Ambientali (Di.S.Te.B.A.), Università del Salento, 73100, Lecce, Italy
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Sun M, Wang C, Wang S, Wang Z, Wang Z, Liu J, Song X, Lin D. NH3•H2O-assisted solvent thermal synthesis of mesoporous spherical NiCo2O4 nanomaterials having rich oxygen vacancies for enhanced activity of CH3OH electrooxidation. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Gamil S, Antuch M, Zedan I, El Rouby WM. 3D NiCr-layered double hydroxide/reduced graphene oxide sand rose-like structure as bifunctional electrocatalyst for methanol oxidation. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125067] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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