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Jannathul Firdhouse M, Lalitha P. Biogenic green synthesis of gold nanoparticles and their applications – A review of promising properties. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109800] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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2
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Parambath JB, Hussain N, Alawadhi H, Park Y, Dionysiou DD, Han C, Mohamed AA. Graphitic Carbon Nitride Platforms Modified with Gold-Aryl Nanoparticles for Efficient Electrocatalytic Hydrogen Evolution. COMMENT INORG CHEM 2022. [DOI: 10.1080/02603594.2022.2078316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Javad B.M. Parambath
- Center for Advanced Materials Research, Research Institute of Sciences and Engineering, University of Sharjah, Sharjah 27272, United Arab Emirates
- Department of Chemistry, College of Sciences, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Najrul Hussain
- Center for Advanced Materials Research, Research Institute of Sciences and Engineering, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Hussain Alawadhi
- Center for Advanced Materials Research, Research Institute of Sciences and Engineering, University of Sharjah, Sharjah 27272, United Arab Emirates
- Department of Applied Physics & Astronomy, College of Sciences, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Yeji Park
- Department of Environmental Engineering, INHA University, Incheon 22212, Republic of Korea
| | - Dionysios D. Dionysiou
- Environmental Engineering and Science Program,Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, Ohio, 45221 USA
| | - Changseok Han
- Department of Environmental Engineering, INHA University, Incheon 22212, Republic of Korea
- Program in Environmental & Polymer Engineering, Graduate School, INHA University, Incheon 22212, Republic of Korea
| | - Ahmed A. Mohamed
- Center for Advanced Materials Research, Research Institute of Sciences and Engineering, University of Sharjah, Sharjah 27272, United Arab Emirates
- Department of Chemistry, College of Sciences, University of Sharjah, Sharjah 27272, United Arab Emirates
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Aryldiazonium gold salts as efficient oxidants for polymerization of anilines. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04689-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ahmad AAL, Marutheri Parambath JB, Postnikov PS, Guselnikova O, Chehimi MM, Bruce MRM, Bruce AE, Mohamed AA. Conceptual Developments of Aryldiazonium Salts as Modifiers for Gold Colloids and Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:8897-8907. [PMID: 34291926 DOI: 10.1021/acs.langmuir.1c00884] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Modified colloids and flat surfaces occupy an important place in materials science research due to their widespread applications. Interest in the development of modifiers that adhere strongly to surfaces relates to the need for stability under ambient conditions in many applications. Diazonium salts have evolved as the primary choice for the modification of surfaces. The term "diazonics" has been introduced in the literature to describe "the science and technology of aryldiazonium salt-derived materials". The facile reduction of diazonium salts via chemical or electrochemical processes, irradiation stimuli, or spontaneously results in the efficient modification of gold surfaces. Robust gold-aryl nanoparticles, where gold is connected to the aryl ring through bonding to carbon and films modified by using diazonium salts, are critical in electronics, sensors, medical implants, and materials for power sources. Experimental and theoretical studies suggest that gold-carbon interactions constructed via chemical reactions with diazonium salts are stronger than nondiazonium surface modifiers. This invited feature article summarizes the conceptual development of recent studies of diazonium salts in our laboratories and others with a focus on the surface modification of gold nanostructures, flat surfaces and gratings, and their applications in nanomedicine engineering, sensors, energy, forensic science, and catalysis.
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Affiliation(s)
- Ahmad A L Ahmad
- Department of Chemistry, University of Maine, Orono, Maine 04469, United States
| | | | - Pavel S Postnikov
- Research School of Chemistry & Applied Biomedical Sciences, Tomsk Polytechnic University, Tomsk 634050, Russian Federation
| | - Olga Guselnikova
- Research School of Chemistry & Applied Biomedical Sciences, Tomsk Polytechnic University, Tomsk 634050, Russian Federation
| | - Mohamed Mehdi Chehimi
- Université de Paris, CNRS-UMR 7086, Interfaces, Traitements, Organisation et DYnamique des Systèmes (ITODYS), F-75013 Paris, France
| | - Mitchell R M Bruce
- Department of Chemistry, University of Maine, Orono, Maine 04469, United States
| | - Alice E Bruce
- Department of Chemistry, University of Maine, Orono, Maine 04469, United States
| | - Ahmed A Mohamed
- Department of Chemistry, College of Sciences, University of Sharjah, Sharjah 27272, UAE
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Almheiri S, Ahmad AA, Le Droumaguet B, Pires R, Chehimi MM, Mohamed AA. Spontaneous redox route for gold‐aryl film development of latent fingerprints on nickel coins. SURF INTERFACE ANAL 2021. [DOI: 10.1002/sia.6941] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Saeed Almheiri
- Center for Advanced Materials Research, Research Institute of Sciences and Engineering University of Sharjah Sharjah UAE
- Univ Paris Est Créteil, CNRS, UMR 7182, UPEC, F‐94320 Thiais France
| | | | | | - Rémy Pires
- Univ Paris Est Créteil, CNRS, UMR 7182, UPEC, F‐94320 Thiais France
| | | | - Ahmed A. Mohamed
- Center for Advanced Materials Research, Research Institute of Sciences and Engineering University of Sharjah Sharjah UAE
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Abla F, Kanan SM, Park Y, Han C, Omastova M, Chehimi MM, Mohamed AA. Exceptionally redox-active precursors in the synthesis of gold core-tin oxide shell nanostructures. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126266] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Retout M, Blond P, Jabin I, Bruylants G. Ultrastable PEGylated Calixarene-Coated Gold Nanoparticles with a Tunable Bioconjugation Density for Biosensing Applications. Bioconjug Chem 2021; 32:290-300. [PMID: 33439626 DOI: 10.1021/acs.bioconjchem.0c00669] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Many in vivo and in vitro applications using gold nanoparticles (AuNPs) require (i) their PEGylation, as it increases their stability and prevents nonspecific protein adsorption, and (ii) their conjugation to biomolecules, that provides them with specific recognition properties. Currently, the functionalization of AuNPs is based on thiol chemistry that suffers from two major drawbacks: (i) the Au-S bond is labile and confers limited chemical robustness to the organic layer, and (ii) control over the bioconjugation density is highly challenging. We report here a novel functionalization strategy based on calix[4]arene-tetradiazonium platforms for the coating of AuNPs with a robust PEG layer and their controlled bioconjugation. AuNPs were first modified with a functional calix[4]arene-diazonium salt bearing three PEG chains ended by a methoxy group and one by a carboxyl group. The resulting particles showed excellent chemical and colloidal stabilities, compared to similar systems obtained via a classical thiol chemistry, and could even be dispersed in human serum without degrading or aggregating. In addition to that, the carboxyl groups protruding from the PEG layer allowed their conjugation via amide bond formation with amine-containing biomolecules such as peptides. The control of the bioconjugation was obtained by grafting mixed layers of functional and nonfunctional PEGylated calix[4]arenes, that allowed varying the number of functional groups carried by the AuNPs and subsequently their bioconjugation capacity while preserving their dense protective PEG shell. Finally, we used these nanomaterials, modified with peptide aptamers, for the in vitro biosensing of a cancer biomarker, Mdm2.
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Affiliation(s)
- Maurice Retout
- Engineering of Molecular NanoSystems, Ecole Polytechnique de Bruxelles, Université libre de Bruxelles (ULB), avenue F. D. Roosevelt 50, CP165/64, B-1050 Brussels, Belgium
| | - Pascale Blond
- Laboratoire de Chimie Organique, Université libre de Bruxelles (ULB), avenue F. D. Roosevelt 50, CP160/06, B-1050 Brussels, Belgium
| | - Ivan Jabin
- Laboratoire de Chimie Organique, Université libre de Bruxelles (ULB), avenue F. D. Roosevelt 50, CP160/06, B-1050 Brussels, Belgium
| | - Gilles Bruylants
- Engineering of Molecular NanoSystems, Ecole Polytechnique de Bruxelles, Université libre de Bruxelles (ULB), avenue F. D. Roosevelt 50, CP165/64, B-1050 Brussels, Belgium
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Hameed M, Panicker S, Abdallah SH, Khan AA, Han C, Chehimi MM, Mohamed AA. Protein-Coated Aryl Modified Gold Nanoparticles for Cellular Uptake Study by Osteosarcoma Cancer Cells. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:11765-11775. [PMID: 32931295 DOI: 10.1021/acs.langmuir.0c01443] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Gold nanoparticles coated with proteins have shown extraordinary biocompatibility which advanced to several nanomedicine engineering applications. We synthesized protein-coated gold nanoparticles using green and chemical reduction routes for cellular uptake study. In the current work, we coated gold-aryl nanoparticles of the type AuNPs-C6H4-4-COOH with bovine serum albumin (BSA), collagen, zein, and lysozyme proteins. Both routes were carried out without phase-transfer catalysts or extraneous stabilizing agents. High crystallinity of the AuNPs synthesized by the green route can be seen in transmission electron microscopy images. Osteosarcoma cancer cells are malignant bone tumors with abnormal cellular functions. Studies using MG-63 cells will provide mechanistic suggestions on the details of the amplification in tumors. We studied the cellular uptake of the bioconjugates by MG-63 osteosarcoma cells using laser confocal fluorescence microscopy (LCFM) and flow cytometry. In the LCFM study, BSA-AuNPs were uptaken most efficiently of all protein-coated gold nanoparticles synthesized by the green route. Lysozyme-AuNPs synthesized by the chemical reduction method were mostly efficiently internalized by MG-63 cells among all AuNPs. Zein- and lysozyme-coated AuNPs, though of relatively small size, prepared by the green method were not efficiently uptaken by MG-63. The two nanoparticles are negatively charged, and zein is also a hydrophobic coat. The difference in hydrophobicity and charge might have affected the internalization. All of those coated nanoparticles that were efficiently uptaken can potentially be used as diagnostic and therapeutic agents for osteosarcoma.
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Affiliation(s)
- Mehavesh Hameed
- Department of Chemistry, College of Sciences, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Seema Panicker
- Department of Chemistry, College of Sciences, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Sallam H Abdallah
- Human Genetics and Stem Cells Research Group, Research Institute of Sciences and Engineering, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Amir A Khan
- Human Genetics and Stem Cells Research Group, Research Institute of Sciences and Engineering, University of Sharjah, Sharjah 27272, United Arab Emirates
- Department of Applied Biology, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Changseok Han
- Department of Environmental Engineering, INHA University, 100 Inha-ro, Michuhol-gu, Incheon 22212, Republic of Korea
| | - Mohamed M Chehimi
- Université Paris-Est Créteil, CNRS, ICMPE, UMR7182, F-94320 Thiais, France
| | - Ahmed A Mohamed
- Department of Chemistry, College of Sciences, University of Sharjah, Sharjah 27272, United Arab Emirates
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Efficient synthesis of amino acids capped gold nanoparticles from easily reducible aryldiazonium tetrachloroaurate(III) salts for cellular uptake study. Amino Acids 2020; 52:941-953. [PMID: 32607864 DOI: 10.1007/s00726-020-02862-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 06/17/2020] [Indexed: 12/18/2022]
Abstract
Biomimetic synthesis of gold nanoparticles (GNPs) is critical in biomedical applications. Gold bioconjugates were fabricated by capping the water-dispersible gold-carbon nanoparticles with tyrosine, tryptophan and cysteine amino acids. Incubation of the water-soluble and easily reducible aryldiazonium gold(III) salt [HOOC-4-C6H4N≡N]AuCl4 with amino acids at room temperature formed a purple color over a few minutes with tryptophan and tyrosine and over two hours with cysteine. Rarely that cysteine is capable of reducing gold(III) precursors; however, a cysteine capped gold bioconjugate was synthesized and characterized in this study. Capping GNPs with amino acids was confirmed by high resolution transmission electron microscopy (TEM) and agarose gel electrophoresis. Depending on the amino acid, synthesized particles size was 27.2 ± 5.4 nm, 14.6 ± 7.7 nm and 8.6 ± 2.6 nm for tyrosine, tryptophan and cysteine, respectively. The amino acids capped GNPs showed negligible cytotoxicity to human dermal normal fibroblast cell lines. The highly water dispersible bioconjugates were studied for in vitro cellular uptake by HeLa cancer cells using confocal laser scan microscopy (CLSM) after being labelled with FITC (GNPs-COOH-FITC) and the nuclei were counter stained with DAPI fluorescent dyes. The biomimetic route for the synthesis of the amino acids reduced gold-carbon nanoparticles will benefit the applications in biomedical devices and biosensors.
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The Molecular and Macromolecular Level of Carbon Nanotube Modification Via Diazonium Chemistry: Emphasis on the 2010s Years. CHEMISTRY AFRICA 2020. [DOI: 10.1007/s42250-020-00144-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Abstract
The challenges of diazonium salts stabilization have been overcome by their isolation as metal salts such as tetrachloroaurate(III). The cleavage of molecular nitrogen from diazonium salts even at very low potential or on reducing surfaces by fine tuning the substituents on the phenyl ring expanded their applications as surface modifiers in forensic science, nanomedicine engineering, catalysis and energy. The robustness of the metal–carbon bonding produced from diazonium salts reduction has already opened an era for further applications. The integration of experimental and calculations in this field catalyzed its speedy progress. This review provides a narrative of the progress in this chemistry with stress on our recent contribution, identifies potential applications, and highlights the needs in this emerging field. For these reasons, we hope that this review paper serves as motivation for others to enter this developing field of surface modification originating from diazonium salts.
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AlBab ND, Hameed MK, Maresova A, Ahmady IM, Arooj M, Han C, Workie B, Chehimi M, Mohamed AA. Inhibition of amyloid fibrillation, enzymatic degradation and cytotoxicity of insulin at carboxyl tailored gold-aryl nanoparticles surface. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2019.124279] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Almheiri S, Ahmad AAL, Le Droumaguet B, Pires R, Mohamed AA, Chehimi MM. Development of Latent Fingerprints via Aryldiazonium Tetrachloroaurate Salts on Copper Surfaces: An XPS Study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:74-83. [PMID: 31786922 DOI: 10.1021/acs.langmuir.9b03390] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Surface studies of developed fingerprints have aided in the elimination of criminal cases before moving to the court. The combination of X-ray photoelectron spectroscopy (XPS) with the aryldiazonium gold(III), 4-O2NC6H4N2+AuCl4-, surface modifier has been shown to be a novel approach in latent fingerprint detection and development for the quantification of film elements. The robust gold-aryl film was developed on the reducing chemicals excreted in the sebaceous fingerprints without the need for external stimuli and at a lesser extent after contacting the free metal surface. The concurrent reduction of the diazonium functional group and gold(III) from [AuCl4]- developed a robust gold-aryl film, which showed increasing gold(0) quantity in the time range of 30-120 min over copper coins and model flat sheets. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) support the presence of reduced gold on the top of the latent fingerprints and the presence of CuO resulting from the reaction of the diazonium salt with copper metal. This research combines the quantification of deposits using XPS, a surface-sensitive technique for chemical analysis, in addition to surface imaging.
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Affiliation(s)
- Saeed Almheiri
- Center for Advanced Materials Research, Research Institute of Sciences and Engineering , University of Sharjah , Sharjah 27272 , UAE
- Univ Paris Est Creteil , CNRS , UMR 7182, UPEC, F-94320 Thiais , France
| | - Ahmad A L Ahmad
- Department of Chemistry , University of Maine , Orono , Maine 04469 , United States
| | | | - Rémy Pires
- Univ Paris Est Creteil , CNRS , UMR 7182, UPEC, F-94320 Thiais , France
| | - Ahmed A Mohamed
- Center for Advanced Materials Research, Research Institute of Sciences and Engineering , University of Sharjah , Sharjah 27272 , UAE
| | - Mohamed M Chehimi
- Univ Paris Est Creteil , CNRS , UMR 7182, UPEC, F-94320 Thiais , France
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Polyaniline-Grafted RuO2-TiO2 Heterostructure for the Catalysed Degradation of Methyl Orange in Darkness. Catalysts 2019. [DOI: 10.3390/catal9070578] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Massive industrial and agricultural developments have led to adverse effects of environmental pollution resisting conventional treatment processes. The issue can be addressed via heterogeneous photocatalysis as witnessed recently. Herein, we have developed novel metal/semi-conductor/polymer nanocomposite for the catalyzed degradation and mineralization of model organic dye pollutants in darkness. RuO2-TiO2 mixed oxide nanoparticles (NPs) were modified with diphenyl amino (DPA) groups from the 4-diphenylamine diazonium salt precursor. The latter was reduced with ascorbic acid to provide radicals that modified the NPs and further served for in situ synthesis of polyaniline (PANI) that resulted in RuO2/TiO2-DPA-PANI nanocomposite catalyst. Excellent adhesion of PANI to RuO2/TiO2-DPA was noted but not in the case of the bare mixed oxide. This stresses the central role of diazonium compounds to tether PANI to the underlying mixed oxide. RuO2-TiO2/DPA/PANI nanocomposite revealed superior catalytic properties in the degradation of Methyl Orange (MO) compared to RuO2-TiO2/PANI and RuO2-TiO2. Interestingly, it is active even in the darkness due to high PANI mass loading. In addition, PANI constitutes a protective layer of RuO2-TiO2 NPs that permitted us to reuse the RuO2-TiO2/DPA/PANI nanocomposite nine times, whereas RuO2-TiO2/PANI and RuO2-TiO2 were reused seven and five times only, respectively. The electronic displacements at the interface of the heterojunction metal/semi-conductor under visible light and the synergistic effects between PANI and RuO2 result in the separation of electron-hole pairs and a reduction of its recombination rate as well as a significant catalytic activity of RuO2-TiO2/DPA/PANI under simulated sunlight and in the dark, respectively.
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Classification of Tea Aromas Using Multi-Nanoparticle Based Chemiresistor Arrays. SENSORS 2019; 19:s19112547. [PMID: 31167394 PMCID: PMC6603602 DOI: 10.3390/s19112547] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 05/29/2019] [Accepted: 05/30/2019] [Indexed: 12/03/2022]
Abstract
Nanoparticle based chemical sensor arrays with four types of organo-functionalized gold nanoparticles (AuNPs) were introduced to classify 35 different teas, including black teas, green teas, and herbal teas. Integrated sensor arrays were made using microfabrication methods including photolithography and lift-off processing. Different types of nanoparticle solutions were drop-cast on separate active regions of each sensor chip. Sensor responses, expressed as the ratio of resistance change to baseline resistance (ΔR/R0), were used as input data to discriminate different aromas by statistical analysis using multivariate techniques and machine learning algorithms. With five-fold cross validation, linear discriminant analysis (LDA) gave 99% accuracy for classification of all 35 teas, and 98% and 100% accuracy for separate datasets of herbal teas, and black and green teas, respectively. We find that classification accuracy improves significantly by using multiple types of nanoparticles compared to single type nanoparticle arrays. The results suggest a promising approach to monitor the freshness and quality of tea products.
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Ahmad AA, Alawadhi AH, Park J, Abdou HE, Mohamed AA. Evaluation of diazonium gold(III) salts in forensic chemistry: Latent fingerprint development on metal surfaces. Forensic Chem 2019. [DOI: 10.1016/j.forc.2019.100144] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Panicker S, Ahmady IM, Almehdi AM, Workie B, Sahle-Demessie E, Han C, Chehimi MM, Mohamed AA. Gold-Aryl nanoparticles coated with polyelectrolytes for adsorption and protection of DNA against nuclease degradation. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.4803] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Seema Panicker
- Center for Advanced Materials Research, Research Institute for Science and Engineering; University of Sharjah; Sharjah 27272 UAE
| | - Islam M. Ahmady
- Department of Applied Biology; University of Sharjah; Sharjah 27272 UAE
| | - Ahmed M. Almehdi
- Department of Chemistry; University of Sharjah; Sharjah 27272 UAE
| | - Bizuneh Workie
- Department of Chemistry; Delaware State University; 1200 North DuPont Highway, Dover Delaware 19901 USA
| | - Endalkachew Sahle-Demessie
- The U.S. Environmental Protection Agency, ORD, NRMRL, LMMD, MMB; 26 W. Martin Luther King Jr. Drive Cincinnati Ohio 45268 USA
| | - Changseok Han
- Department of Environmental Engineering; INHA University; Michuhol-gu, 100 Inha-ro Incheon 22212 Republic of Korea
| | | | - Ahmed A. Mohamed
- Center for Advanced Materials Research, Research Institute for Science and Engineering; University of Sharjah; Sharjah 27272 UAE
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Ahmad AAL, Panicker S, Chehimi MM, Monge M, Lopez-de-Luzuriaga JM, Mohamed AA, Bruce AE, Bruce MRM. Synthesis of water-soluble gold–aryl nanoparticles with distinct catalytic performance in the reduction of the environmental pollutant 4-nitrophenol. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01402k] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
In-depth kinetic insight into the catalytic reduction of nitrophenol pollutant using gold–carbon nanoparticles is described.
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Affiliation(s)
| | - Seema Panicker
- Center for Advanced Materials Research
- Research Institute for Science and Engineering
- University of Sharjah
- Sharjah 27272
- United Arab Emirates
| | - Mohamed M. Chehimi
- Institut de Chimie et des Matériaux Paris Est (ICMPE)-SPC-UMR 7182 CNRS-Université Paris Est Créteil
- 94320 Thiais
- France
| | - Miguel Monge
- Departamento de Química
- Centro de Investigación en Síntesis Química (CISQ)
- Universidad de La Rioja
- 26006-Logroño
- Spain
| | - Jose M. Lopez-de-Luzuriaga
- Departamento de Química
- Centro de Investigación en Síntesis Química (CISQ)
- Universidad de La Rioja
- 26006-Logroño
- Spain
| | - Ahmed A. Mohamed
- Center for Advanced Materials Research
- Research Institute for Science and Engineering
- University of Sharjah
- Sharjah 27272
- United Arab Emirates
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Mohamed AA, Neal SN, Atallah B, AlBab ND, Alawadhi HA, Pajouhafsar Y, Abdou HE, Workie B, Sahle-Demessie E, Han C, Monge M, Lopez-de-Luzuriaga JM, Reibenspies JH, Chehimi MM. Synthesis of gold organometallics at the nanoscale. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.07.032] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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20
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Gold-carbon nanoparticles mediated delivery of BSA: Remarkable robustness and hemocompatibility. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.09.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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21
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Kalachyova Y, Olshtrem A, Guselnikova OA, Postnikov PS, Elashnikov R, Ulbrich P, Rimpelova S, Švorčík V, Lyutakov O. Synthesis, Characterization, and Antimicrobial Activity of Near-IR Photoactive Functionalized Gold Multibranched Nanoparticles. ChemistryOpen 2017; 6:254-260. [PMID: 28413761 PMCID: PMC5390809 DOI: 10.1002/open.201600159] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 12/28/2016] [Indexed: 01/17/2023] Open
Abstract
Surface-modified gold multibranched nanoparticles (AuMs) were prepared by simple chemical reduction of gold chloride aqueous solution followed by in situ modification by using water-soluble arenediazonium tosylates with different functional organic groups. Chemical and morphological structures of the prepared nanoparticles were examined by using transmission electron and scanning electron microscopies. The covalent grafting of organic compounds was confirmed by scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX) and Raman spectroscopy techniques. Covalent functionalization of nanoparticles significantly expands the range of their potential uses under physiological conditions, compared with traditional non-covalent or thiol-based approaches. The antibacterial effect of the surface-modified AuMs was evaluated by using Escherichia coli and Staphylococcus epidermidis bacteria under IR light illumination and without external triggering. Strong plasmon resonance on the AuMs cups leads to significant reduction of the light power needed kill bacteria under the mild conditions of continuous illumination. The effect of the surface-modified AuMs on the light-induced antibacterial activities was founded to be dependent on the grafted organic functional groups.
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Affiliation(s)
- Yevgeniya Kalachyova
- Department of Solid State EngineeringUniversity of Chemistry and TechnologyPrague166 28Czech Republic
- Department of Technology of Organic Substances and Polymer MaterialsTomsk Polytechnic University634050TomskRussia
| | - Anasiya Olshtrem
- Department of Bioengineering and Organic SynthesisTomsk Polytechnic University634050TomskRussia
| | - Olga A. Guselnikova
- Department of Solid State EngineeringUniversity of Chemistry and TechnologyPrague166 28Czech Republic
- Department of Technology of Organic Substances and Polymer MaterialsTomsk Polytechnic University634050TomskRussia
| | - Pavel S. Postnikov
- Department of Technology of Organic Substances and Polymer MaterialsTomsk Polytechnic University634050TomskRussia
| | - Roman Elashnikov
- Department of Solid State EngineeringUniversity of Chemistry and TechnologyPrague166 28Czech Republic
| | - Pavel Ulbrich
- Department of Biochemistry and MicrobiologyInstitute of Chemical Technology166 28PragueCzech Republic
| | - Silvie Rimpelova
- Department of Biochemistry and MicrobiologyInstitute of Chemical Technology166 28PragueCzech Republic
| | - Václav Švorčík
- Department of Solid State EngineeringUniversity of Chemistry and TechnologyPrague166 28Czech Republic
| | - Oleksiy Lyutakov
- Department of Solid State EngineeringUniversity of Chemistry and TechnologyPrague166 28Czech Republic
- Department of Technology of Organic Substances and Polymer MaterialsTomsk Polytechnic University634050TomskRussia
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22
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Enciso AE, Doni G, Nifosì R, Palazzesi F, Gonzalez R, Ellsworth AA, Coffer JL, Walker AV, Pavan GM, Mohamed AA, Simanek EE. Facile synthesis of stable, water soluble, dendron-coated gold nanoparticles. NANOSCALE 2017; 9:3128-3132. [PMID: 28211928 DOI: 10.1039/c6nr09679d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Upon reduction with sodium borohydride, diazonium tetrachloroaurate salts of triazine dendrons yield dendron-coated gold nanoparticles connected by a gold-carbon bond. These robust nanoparticles are stable in water and toluene solutions for longer than one year and present surface groups that can be reacted to change surface chemistry and manipulate solubility. Molecular modeling was used to provide insight on the hydration of the nanoparticles and their observed solubilties.
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Affiliation(s)
- Alan E Enciso
- Department of Chemistry, Texas Christian University, Fort Worth, TX 76109, USA
| | - Giovanni Doni
- Department of Physics, King's College, London Strand, London WC2R 2NS, UK
| | - Riccardo Nifosì
- NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Pisa, Italy
| | - Ferruccio Palazzesi
- Department of Chemistry and Applied Biosciences, Eidgenössische Technische Hochschule Zürich, CH-8093 Zurich, Switzerland and Facoltá di Informatica, Istituto di Scienze Computazionali, Universitá della Svizzera Italiana, CH-6900 Lugano, Switzerland
| | - Roberto Gonzalez
- Department of Chemistry, Texas Christian University, Fort Worth, TX 76109, USA
| | | | - Jeffery L Coffer
- Department of Chemistry, Texas Christian University, Fort Worth, TX 76109, USA
| | - Amy V Walker
- Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson, TX 75080, USA and Department of Materials Science and Engineering, University of Texas at Dallas, Richardson, TX 75080, USA
| | - Giovanni M Pavan
- Department of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland, Galleria 2, Via Cantonale 2c, CH-6928 Manno, Switzerland
| | - Ahmed A Mohamed
- Department of Chemistry, Texas Christian University, Fort Worth, TX 76109, USA and Department of Chemistry, University of Sharjah, Sharjah, United Arab Emirates
| | - Eric E Simanek
- Department of Chemistry, Texas Christian University, Fort Worth, TX 76109, USA
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23
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Guselnikova OA, Postnikov PS, Fitl P, Tomecek D, Sajdl P, Elashnikov R, Kolska Z, Chehimi MM, Švorčík V, Lyutakov O. Tuning of PEDOT:PSS Properties Through Covalent Surface Modification. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/polb.24282] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Olga A. Guselnikova
- Department of Solid State Engineering; University of Chemistry and Technology; Prague 16628 Czech Republic
- Department of Technology of Organic Substances and Polymer Materials; Tomsk Polytechnic University; Tomsk 634050 Russia
| | - Pavel S. Postnikov
- Department of Technology of Organic Substances and Polymer Materials; Tomsk Polytechnic University; Tomsk 634050 Russia
| | - Premysl Fitl
- Department of Physics and Measurements; University of Chemistry and Technology; Prague 16628 Czech Republic
| | - David Tomecek
- Department of Physics and Measurements; University of Chemistry and Technology; Prague 16628 Czech Republic
| | - Petr Sajdl
- Department of Power Engineering; University of Chemistry and Technology; Prague 16628 Czech Republic
| | - Roman Elashnikov
- Department of Solid State Engineering; University of Chemistry and Technology; Prague 16628 Czech Republic
| | - Zdenka Kolska
- Faculty and Science; J. E. Purkinje University in Usti nad Labem; Usti nad Labem Czech Republic
| | - Mohamed M. Chehimi
- Université Paris Est, Institut de Chimie et des Matériaux Paris-Est (ICMPE) (UMR7182), CNRS, UPEC; Thiais F-94320 France
| | - Vaclav Švorčík
- Department of Solid State Engineering; University of Chemistry and Technology; Prague 16628 Czech Republic
| | - Oleksiy Lyutakov
- Department of Solid State Engineering; University of Chemistry and Technology; Prague 16628 Czech Republic
- Department of Technology of Organic Substances and Polymer Materials; Tomsk Polytechnic University; Tomsk 634050 Russia
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24
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Sandomierski M, Strzemiecka B, Chehimi MM, Voelkel A. Reactive Diazonium-Modified Silica Fillers for High-Performance Polymers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:11646-11654. [PMID: 27726385 DOI: 10.1021/acs.langmuir.6b02891] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We describe a simple way of modification of three silica-based fillers with in situ generated 4-hydroxymethylbenzenediazonium salt (+N2-C6H4-CH2OH). The rationale for using a hydroxyl-functionalized diazonium salt is that it provides surface-functionalized fillers that can react with phenolic resins. The modification of silica by diazonium salts was assessed using Fourier transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS). FTIR spectroscopy permitted the tracking of benzene ring breathing and C-C. The absence of the characteristic N≡N stretching vibration in the 2200-2300 cm-1 range indicates the loss of the diazonium group. XPS results indicate a higher C/Si atomic ratio after the diazonium modification of fillers and the presence of π-π* C1s satellite peaks characteristic of the surface-tethered aromatic species. Adhesion of aryl layers to the silicas is excellent because they withstand harsh thermal and organic solvent treatments. Phenolic resins (used, for example, as binders in abrasive products) were filled with diazonium-modified silicas at 10-25 wt %. The reactivity of the fillers toward phenolic resins was evaluated by the determination of the flow distance. After annealing at 180 °C, the diazonium-modified silica/phenolic resin composites were mechanically tested using the three-point flexural method. The flexural strength was found to be up to 35% higher than that of the composites prepared without any diazonium salts. Diazonium-modified silica with surface-bound -CH2-OH groups is thus ideal reactive filler for phenolic resins. Such filler ensures interfacial chemical reactions with the matrix and imparts robust mechanical properties to the final composites. This specialty diazonium-modified silica will find potential application as fillers in the composites for the abrasive industry. More generally, aryl diazonium salts are a unique new series of compounds for tailoring the surface properties of fillers and tuning the physicochemical and mechanical properties of polymer composites.
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Affiliation(s)
- Mariusz Sandomierski
- Institute of Chemical Technology and Engineering, Poznan University of Technology , Berdychowo 4, 60-965 Poznań, Poland
| | - Beata Strzemiecka
- Institute of Chemical Technology and Engineering, Poznan University of Technology , Berdychowo 4, 60-965 Poznań, Poland
| | - Mohamed M Chehimi
- Université Paris Est, ICMPE (UMR 7182), CNRS, UPEC , 2-8 rue Henri Dunant, Thiais 94320, France
| | - Adam Voelkel
- Institute of Chemical Technology and Engineering, Poznan University of Technology , Berdychowo 4, 60-965 Poznań, Poland
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25
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Guo H, He X, Wan CQ, Zhao L. A stepwise bulk-to-cluster-to-particle transformation toward the efficient synthesis of alkynyl-protected silver nanoclusters. Chem Commun (Camb) 2016; 52:7723-6. [PMID: 27241312 DOI: 10.1039/c6cc02950g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report herein the efficient synthesis of alkynyl-protected silver nanoclusters in terms of macrocycle-assisted bulk-to-cluster-to-nanoparticle transformation. Different substituted phenylacetylide ligands are applied to stabilize the silver nanoclusters by metal-carbon bonds and meanwhile determine the size of silver nanoclusters.
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Affiliation(s)
- Hui Guo
- Beijing Key Laboratory for Optical Materials and Photonic Devices, Department of Chemistry, Capital Normal University, Beijing 100048, China. and Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China.
| | - Xin He
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China.
| | - Chong-Qing Wan
- Beijing Key Laboratory for Optical Materials and Photonic Devices, Department of Chemistry, Capital Normal University, Beijing 100048, China.
| | - Liang Zhao
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China.
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26
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Troian-Gautier L, Valkenier H, Mattiuzzi A, Jabin I, den Brande NV, Mele BV, Hubert J, Reniers F, Bruylants G, Lagrost C, Leroux Y. Extremely robust and post-functionalizable gold nanoparticles coated with calix[4]arenes via metal–carbon bonds. Chem Commun (Camb) 2016; 52:10493-6. [DOI: 10.1039/c6cc04534k] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Gold nanoparticles stabilized with a thin layer of post-functionalizable calix[4]arenes were prepared through the reductive grafting of a calix[4]arene-tetra-diazonium salt.
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27
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Berisha A, Chehimi M, Pinson J, Podvorica F. Electrode Surface Modification Using Diazonium Salts. ELECTROANALYTICAL CHEMISTRY: A SERIES OF ADVANCES 2015. [DOI: 10.1201/b19196-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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28
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Gold-organic thin films from the reductive grafting of diazonium gold(III) salts. J Electroanal Chem (Lausanne) 2015. [DOI: 10.1016/j.jelechem.2015.09.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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29
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Mohamed AA, Salmi Z, Dahoumane SA, Mekki A, Carbonnier B, Chehimi MM. Functionalization of nanomaterials with aryldiazonium salts. Adv Colloid Interface Sci 2015; 225:16-36. [PMID: 26299313 DOI: 10.1016/j.cis.2015.07.011] [Citation(s) in RCA: 125] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2015] [Revised: 07/18/2015] [Accepted: 07/27/2015] [Indexed: 01/04/2023]
Abstract
This paper reviews the surface modification strategies of a wide range of nanomaterials using aryldiazonium salts. After a brief history of diazonium salts since their discovery by Peter Griess in 1858, we will tackle the surface chemistry using these compounds since the first trials in the 1950s. We will then focus on the modern surface chemistry of aryldiazonium salts for the modification of materials, particularly metallic, semiconductors, metal oxide nanoparticles, carbon-based nanostructures, diamond and clays. The successful modification of sp(2) carbon materials and metals by aryldiazonium salts paved the way to innovative strategies for the attachment of aryl layers to metal oxide nanoparticles and nanodiamonds, and intercalation of clays. Interestingly, diazotized surfaces can easily trap nanoparticles and nanotubes while diazotized nanoparticles can be (electro)chemically reduced on electrode/materials surfaces as molecular compounds. Both strategies provided organized 2D surface assembled nanoparticles. In this review, aryldiazonium salts are highlighted as efficient coupling agents for many types of molecular, macromolecular and nanoparticulate species, therefore ensuring stability to colloids on the one hand, and the construction of composite materials and hybrid systems with robust and durable interfaces/interphases, on the other hand. The last section is dedicated to a selection of patents and industrial products based on aryldiazonium-modified nanomaterials. After nearly 160 years of organic chemistry, diazonium salts have entered a new, long and thriving era for the benefit of materials, colloids, and surface scientists. This tempts us to introduce the terminology of "diazonics" we define as the science and technology of aryldiazonium salt-derived materials.
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Affiliation(s)
- Ahmed A Mohamed
- Department of Chemistry, University of Sharjah, Sharjah 27272, United Arab Emirates; Department of Chemistry, Delaware State University, 1200 N. DuPont Highway, Dover 19901, DE, USA
| | - Zakaria Salmi
- Université Paris-Est, ICMPE UMR 7182 CNRS - UPEC, SPC, PoPI team: Polymers & Particles @ Interfaces, 2-8 rue Henri Dunant, 94320 Thiais, France
| | - Si Amar Dahoumane
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4L7, Canada
| | - Ahmed Mekki
- Ecole Militaire Polytechnique, BP 17, Bordj El Bahri 16111, Algiers, Algeria
| | - Benjamin Carbonnier
- Université Paris-Est, ICMPE UMR 7182 CNRS - UPEC, SPC, PoPI team: Polymers & Particles @ Interfaces, 2-8 rue Henri Dunant, 94320 Thiais, France
| | - Mohamed M Chehimi
- Université Paris-Est, ICMPE UMR 7182 CNRS - UPEC, SPC, PoPI team: Polymers & Particles @ Interfaces, 2-8 rue Henri Dunant, 94320 Thiais, France; Université Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR CNRS 7086, 15 rue J-A de Baïf, 75013 Paris, France.
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30
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Bashouti MY, Resch S, Ristein J, Mačković M, Spiecker E, Waldvogel SR, Christiansen SH. Functionalization of Silver Nanowires Surface using Ag-C Bonds in a Sequential Reductive Method. ACS APPLIED MATERIALS & INTERFACES 2015; 7:21657-21661. [PMID: 26393815 DOI: 10.1021/acsami.5b06830] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Silver nanowires (Ag-NW) assembled in interdigitated webs have shown an applicative potential as transparent and conducting electrodes. However, upon integration in practical device designs, the presence of silver oxide, which instantaneously forms on the Ag-NW surfaces in ambient conditions, is unwanted. Here, we report on the functionalization of Ag-NWs with 4-nitrophenyl moieties through A-C bonds using a versatile two step reduction process, i.e., ascorbate reduction combined electrografting. We show that 40% of the Ag atop sites were terminated and provide high surface stability toward oxidation for more than 2 months while keeping the same intrinsic conductivity as in bulk silver.
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Affiliation(s)
- Muhammad Y Bashouti
- Physics Department, Max-Planck-Institute of the Science of Light , Günther-Scharowsky-Str. 1, Erlangen D-91058, Germany
| | - Sebastian Resch
- Department for Organic Chemistry Johannes Gutenberg-University Duesbergweg 10-14, Mainz D-55128, Germany
| | - Jürgen Ristein
- Department for Laser Physics, University of Erlangen-Nürnberg , Staudtstrasse 1, Erlangen D-91058, Germany
| | - Mirza Mačković
- Institute of Micro- and Nanostructure Research (WW9) & Center for Nanoanalysis and Electron Microscopy (CENEM), University of Erlangen-Nürnberg , Cauerstrasse 6, 91058 Erlangen, Germany
| | - Erdmann Spiecker
- Institute of Micro- and Nanostructure Research (WW9) & Center for Nanoanalysis and Electron Microscopy (CENEM), University of Erlangen-Nürnberg , Cauerstrasse 6, 91058 Erlangen, Germany
| | - Siegfried R Waldvogel
- Department for Organic Chemistry Johannes Gutenberg-University Duesbergweg 10-14, Mainz D-55128, Germany
| | - Silke H Christiansen
- Physics Department, Max-Planck-Institute of the Science of Light , Günther-Scharowsky-Str. 1, Erlangen D-91058, Germany
- Institute of Nanoarchitecture for Energy Conversion, Helmholtz-Center Berlin (HZB) , Hahn-Meitner-Platz 1, Berlin D-14109, Germany
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31
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Guselnikova OA, Galanov AI, Gutakovskii AK, Postnikov PS. The convenient preparation of stable aryl-coated zerovalent iron nanoparticles. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2015; 6:1192-8. [PMID: 26171295 PMCID: PMC4464190 DOI: 10.3762/bjnano.6.121] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Accepted: 04/29/2015] [Indexed: 05/02/2023]
Abstract
A novel approach for the in situ synthesis of zerovalent aryl-coated iron nanoparticles (NPs) based on diazonium salt chemistry is proposed. Surface-modified zerovalent iron NPs (ZVI NPs) were prepared by simple chemical reduction of iron(III) chloride aqueous solution followed by in situ modification using water soluble arenediazonium tosylate. The resulting NPs, with average iron core diameter of 21 nm, were coated with a 10 nm thick organic layer to provide long-term protection in air for the highly reactive zerovalent iron core up to 180 °C. The surface-modified iron NPs possess a high grafting density of the aryl group on the NPs surface of 1.23 mmol/g. FTIR spectroscopy, XRD, HRTEM, TGA/DTA, and elemental analysis were performed in order to characterize the resulting material.
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Affiliation(s)
- Olga A Guselnikova
- Department of Biotechnology and Organic Chemistry, Tomsk Polytechnic University, Tomsk 634050, Russian Federation
| | - Andrey I Galanov
- Department of General and Inorganic Chemistry, Tomsk Polytechnic University, Tomsk 634050, Russian Federation
| | - Anton K Gutakovskii
- Institute of Semiconductor Physics, Novosibirsk 630090, Russian Federation
- Novosibirsk State University, Novosibirsk 630090, Russian Federation
| | - Pavel S Postnikov
- Department of General and Inorganic Chemistry, Tomsk Polytechnic University, Tomsk 634050, Russian Federation
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32
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Kesavan S, Prabhakaran A, John SA. Formation of heteroaromatic diazonium grafted layers on gold nanoparticles and their electrocatalytic activity towards an important purine derivative. RSC Adv 2014. [DOI: 10.1039/c4ra04754k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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