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Raicopol M, Pilan L. The Role of Aryldiazonium Chemistry in Designing Electrochemical Aptasensors for the Detection of Food Contaminants. Materials (Basel) 2021; 14:ma14143857. [PMID: 34300776 PMCID: PMC8303706 DOI: 10.3390/ma14143857] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/04/2021] [Accepted: 07/06/2021] [Indexed: 01/19/2023]
Abstract
Food safety monitoring assays based on synthetic recognition structures such as aptamers are receiving considerable attention due to their remarkable advantages in terms of their ability to bind to a wide range of target analytes, strong binding affinity, facile manufacturing, and cost-effectiveness. Although aptasensors for food monitoring are still in the development stage, the use of an electrochemical detection route, combined with the wide range of materials available as transducers and the proper immobilization strategy of the aptamer at the transducer surface, can lead to powerful analytical tools. In such a context, employing aryldiazonium salts for the surface derivatization of transducer electrodes serves as a simple, versatile and robust strategy to fine-tune the interface properties and to facilitate the convenient anchoring and stability of the aptamer. By summarizing the most important results disclosed in the last years, this article provides a comprehensive review that emphasizes the contribution of aryldiazonium chemistry in developing electrochemical aptasensors for food safety monitoring.
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Affiliation(s)
- Matei Raicopol
- Costin Nenitzescu, Department of Organic Chemistry, Faculty of Applied Chemistry and Material Science, University Politehnica of Bucharest, 1-7 Gheorghe Polizu, 011061 Bucharest, Romania;
| | - Luisa Pilan
- Department of Inorganic Chemistry, Physical Chemistry and Electrochemistry, Faculty of Applied Chemistry and Material Science, University Politehnica of Bucharest, 1-7 Gheorghe Polizu, 011061 Bucharest, Romania
- Correspondence: ; Tel.: +40-21-402-3977
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Svirinovsky A, Perelshtein I, Natan M, Banin E, Gedanken A. Imparting superhydrophobic and biocidal functionalities to a polymeric substrate by the sonochemical method. Ultrason Sonochem 2018; 44:398-403. [PMID: 29680626 DOI: 10.1016/j.ultsonch.2018.02.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Revised: 01/22/2018] [Accepted: 02/05/2018] [Indexed: 06/08/2023]
Abstract
Multifunctional substrates with superhydrophobic and biocidal properties are gaining interest for a wide range of applications; however, the production of such surfaces remains challenging. Here, the sonochemical method is utilized to impart superhydrophobicity and antimicrobial properties to a polyethylene (PE) sheet. This is achieved by sonochemically depositing nanoparticles (NPs) of a hydrophobic fluoro-polymer (FP) on the PE sheets. The polymer is a flexible, transparent fluoroplastic composed of tetrafluoroethylene, hexafluoropropylene and vinylidene fluoride in the form of a powder. The NPs of polymers are generated and deposited on the surface of the PE using ultrasound irradiation. Optimizing the process results in a homogeneous distribution of 110-200 nm of NPs on the PE surface. The coated surface displays a water-contact angle of 160°, indicating excellent superhydrophobicity. This superhydrophobic surface shows high stability under outdoor conditions for two months, which is essential for various applications. In addition, metal-oxide nanoparticles (CuO or ZnO NPs) were integrated into the polymer coating to achieve antibacterial properties and increase the surface roughness. The metal oxides were also deposited sonochemically. The antibacterial activity of the FP@ZnO and FP@CuO PE composites was tested against the bacterium Staphylococcus aureus, and the results show that the FP@CuO PE can effectively eradicate the bacteria. This study highlights the feasibility of using the sonochemical method to deposit two separate functions, opening up new possibilities for producing "smart" novel surfaces.
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Affiliation(s)
- Asya Svirinovsky
- Department of Chemistry and the Institute for Nanotechnology and Advanced Materials (BINA), Bar-Ilan University, Ramat Gan 5290002, Israel
| | - Ilana Perelshtein
- Department of Chemistry and the Institute for Nanotechnology and Advanced Materials (BINA), Bar-Ilan University, Ramat Gan 5290002, Israel
| | - Michal Natan
- The Mina and Everard Goodman Faculty of Life Sciences and the Institute for Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 5290002, Israel
| | - Ehud Banin
- The Mina and Everard Goodman Faculty of Life Sciences and the Institute for Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 5290002, Israel
| | - Aharon Gedanken
- Department of Chemistry and the Institute for Nanotechnology and Advanced Materials (BINA), Bar-Ilan University, Ramat Gan 5290002, Israel.
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Aboud N, Ferraro D, Taverna M, Descroix S, Smadja C, Thuy Tran N. Dyneon THV, a fluorinated thermoplastic as a novel material for microchip capillary electrophoresis. Analyst 2016; 141:5776-5783. [PMID: 27486596 DOI: 10.1039/c6an00821f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
In this work, we have investigated Dyneon THV, a fluorinated material, as a new material to afford electrokinetic separations in microfluidic devices. To overcome protein adsorption, two poly(ethylene oxide) (PEO)-based coatings have been investigated: Pluronic F127 and PEO stearate 40. The best results were obtained with the PEO stearate 40 coating which allowed decreasing the surface contact angle from 91 ± 3 to 76°± 3. With this surface treatment, a 66% reduction of the electroosmotic mobility at pH 8.0 and a marked suppression of protein adsorption were observed compared to a native Dyneon THV microchip. Finally, a separation of fluorescently labeled proteins (bovine serum albumin and trypsin inhibitor), well-known for their strong tendency to adsorb on hydrophobic surfaces, was successfully achieved in an HEPES buffer with a PEO stearate 40 treated microchip by capillary zone electrophoresis. Furthermore, we demonstrated the possibility to perform non-aqueous capillary electrophoresis analysis of hydrophobic dyes using various solvents in untreated microchips. The overall results demonstrated not only the suitability of the Dyneon THV microchip for electrokinetic separations, but also its versatility allowing different separation modes to be implemented with the same microchip material.
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Affiliation(s)
- Nacéra Aboud
- Institut Galien Paris Sud, UMR8612, Protein and Nanotechnology in Analytical Science (PNAS), CNRS, Univ. Paris-Sud, Université Paris-Saclay, 5 rue Jean Baptiste Clément, 92290 Châtenay-Malabry, France.
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Hetemi D, Médard J, Kanoufi F, Combellas C, Pinson J, Podvorica FI. Surface Modification of Polymers by Reaction of Alkyl Radicals. Langmuir 2016; 32:512-518. [PMID: 26653398 DOI: 10.1021/acs.langmuir.5b03669] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The surfaces of poly(methyl methacrylate) and polyethylene are modified either (i) by a two-step process including the thermal reaction of alkyl radicals derived from bromohexanoic acid in a mixture of 2,6-dimethylbenzene diazonium salt and neat isopentyl nitrite at 60 °C, followed by reaction with p-nitroaniline, anthraquinone, neutral red, and polyethylene glycol moieties, or (ii) by reaction of a previously anthraquinone-modified bromohexanoic acid. The modified surfaces are characterized by IR, XPS, UV, and water contact angles. A mechanism is proposed to rationalize the results. This approach is an efficient way to modify and pattern polymer surfaces with different organic groups and chemical functionalities under mild conditions.
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Affiliation(s)
- Dardan Hetemi
- Univ Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR 7086 CNRS , 15 rue J-A de Baïf, 75205 Paris Cedex 13, France
- Chemistry Department of Natural Sciences Faculty, University of Prishtina , rr. "NënaTereze" nr.5, 10000 Prishtina, Kosovo
| | - Jérôme Médard
- Univ Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR 7086 CNRS , 15 rue J-A de Baïf, 75205 Paris Cedex 13, France
| | - Frédéric Kanoufi
- Univ Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR 7086 CNRS , 15 rue J-A de Baïf, 75205 Paris Cedex 13, France
| | - Catherine Combellas
- Univ Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR 7086 CNRS , 15 rue J-A de Baïf, 75205 Paris Cedex 13, France
| | - Jean Pinson
- Univ Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR 7086 CNRS , 15 rue J-A de Baïf, 75205 Paris Cedex 13, France
| | - Fetah I Podvorica
- Univ Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR 7086 CNRS , 15 rue J-A de Baïf, 75205 Paris Cedex 13, France
- Chemistry Department of Natural Sciences Faculty, University of Prishtina , rr. "NënaTereze" nr.5, 10000 Prishtina, Kosovo
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Slim C, Ratajovà E, Griveau S, Kanoufi F, Ferraro D, Perréard C, d’Orlyé F, Varenne A, Bedioui F. Two-step local functionalization of fluoropolymer Dyneon THV microfluidic materials by scanning electrochemical microscopy combined to click reaction. Electrochem commun 2015. [DOI: 10.1016/j.elecom.2015.07.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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