1
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Bucatariu F, Petrila LM, Teodosiu C, Mihai M. Versatile nanostructured SiO 2 /cross-linked polyelectrolyte composites for emerging pollutants removal from aqueous media. CR CHIM 2022. [DOI: 10.5802/crchim.171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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2
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Stimuli-responsive polyelectrolyte multilayer films and microcapsules. Adv Colloid Interface Sci 2022; 310:102773. [DOI: 10.1016/j.cis.2022.102773] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 08/20/2022] [Accepted: 09/05/2022] [Indexed: 12/28/2022]
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3
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Zhang W, Cui H, Lv Y, Yang Q, Huang Y, Li G, Kong M. Synergistically enhanced performance of epoxy resin by block copolymer and multi‐walled carbon nanotubes. J Appl Polym Sci 2022. [DOI: 10.1002/app.52457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Wei Zhang
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering of China, Sichuan University Chengdu China
| | - Huanan Cui
- China Academy of Space Technology Beijing China
| | - Yadong Lv
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering of China, Sichuan University Chengdu China
| | - Qi Yang
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering of China, Sichuan University Chengdu China
| | - Yajiang Huang
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering of China, Sichuan University Chengdu China
| | - Guangxian Li
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering of China, Sichuan University Chengdu China
| | - Miqiu Kong
- School of Aeronautics and Astronautics State Key Laboratory of Polymer Materials Engineering of China, Sichuan University Chengdu China
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4
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Chattaraj KG, Paul S. Appraising the potency of small molecule inhibitors and their graphene surface-mediated organizational attributes on uric acid-melamine clusters. Phys Chem Chem Phys 2022; 24:1029-1047. [PMID: 34927187 DOI: 10.1039/d1cp03695e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Uric acid (UA) and melamine (MM) crystallization in humans is associated with adverse medical conditions, including the germination of kidney stones, because of their low solubility. The growth of kidney stones, usually formed on renal papillary facades, is accomplished on the matrix-coated surface by the aggregation of preformed crystals or secondary crystal nucleation. Therefore, the effects of inhibitors such as theobromine (TB) and allopurinol (AP) on MM-UA aggregation are investigated by employing classical molecular dynamics simulations on a graphene surface. This impersonates the exact essence of the precipitation of kidney stones. The interaction between MM-UA is very intense and, thus, large clusters are formed on the surface. The presence of TB and AP will, however, substantially inhibit their aggregation. TB and AP significantly impede UA aggregation in particular. Therefore, lower order UA clusters are formed. These smaller UA clusters then pull a lower number of MM towards themselves, resulting in a smaller order UA-MM cluster. MM and UA aggregation on a 2D graphene surface is found to be spontaneous. There is no difference in these molecules' adsorption with a change in the force field parameters (i.e., GAFF and OPLS-AA) for graphene. Moreover, the greater the surface area of graphene, the more molecules are absorbed. The solute-surface van der Waals interaction energy plays a driving force in the adsorption of solute molecules on the surface. In addition, interactions like hydrogen bonding and π-stacking over the graphene surface involve binding all like molecules. These aggregated solute molecules strongly attract more like molecules until all solute molecules are adsorbed on the graphene surface, as estimated by enhanced sampling. The molecular origin of graphene exfoliation by MM is also described here. The present work helps to design novel kidney stone inhibitors.
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Affiliation(s)
| | - Sandip Paul
- Department of Chemistry, Indian Institute of Technology, Guwahati Assam, India, 781039.
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5
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Yuan W, Weng GM, Lipton J, Li CM, Van Tassel PR, Taylor AD. Weak polyelectrolyte-based multilayers via layer-by-layer assembly: Approaches, properties, and applications. Adv Colloid Interface Sci 2020; 282:102200. [PMID: 32585489 DOI: 10.1016/j.cis.2020.102200] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 06/03/2020] [Accepted: 06/11/2020] [Indexed: 10/24/2022]
Abstract
Layer-by-layer (LbL) assembly is a nanoscale technique with great versatility, simplicity and molecular-level processing of various nanoscopic materials. Weak polyelectrolytes have been used as major building blocks for LbL assembly providing a fundamental and versatile tool to study the underlying mechanisms and practical applications of LbL assembly due to its pH-responsive charge density and molecular conformation. Because of high-density uncompensated charges and high-chain mobility, weak polyelectrolyte exponential multilayer growth is considered one of the fastest developing areas for organized molecular films. In this article, we systematically review the current status and developments of weak polyelectrolyte-based multilayers including all-weak-polyelectrolyte multilayers, weak polyelectrolytes/other components (e.g. strong polyelectrolytes, neutral polymers, and nanoparticles) multilayers, and exponentially grown weak polyelectrolyte multilayers. Several key aspects of weak polyelectrolytes are highlighted including the pH-controllable properties, the responsiveness to environmental pH, and synergetic functions obtained from weak polyelectrolyte/other component multilayers. Throughout this review, useful applications of weak polyelectrolyte-based multilayers in drug delivery, tunable biointerfaces, nanoreactors for synthesis of nanostructures, solid state electrolytes, membrane separation, and sensors are highlighted, and promising future directions in the area of weak polyelectrolyte-based multilayer assembly such as fabrication of multi-responsive materials, adoption of unique building blocks, investigation of internal molecular-level structure and mechanism of exponentially grown multilayers, and exploration of novel biomedical and energy applications are proposed.
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6
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Salomäki M, Kauppila J, Kankare J, Lukkari J. Oxidative Layer-By-Layer Multilayers Based on Metal Coordination: Influence of Intervening Graphene Oxide Layers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:13171-13182. [PMID: 30278139 PMCID: PMC6222557 DOI: 10.1021/acs.langmuir.8b02784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 09/25/2018] [Indexed: 06/08/2023]
Abstract
Layer-by-layer (LbL) fabricated oxidative multilayers consisting of successive layers of inorganic polyphosphate (PP) and Ce(IV) can electrolessly form thin conducting polymer films on their surface. We describe the effect of substituting every second PP layer in the (PP/Ce) multilayers for graphene oxide (GO) as a means of modifying the structure and mechanical properties of these (GO/Ce/PP/Ce) films and enhancing their growth. Both types of LbL films are based on reversible coordinative bonding between the metal ions and the oxygen-bearing groups in PP and GO, instead of purely electrostatic interactions. The GO incorporation leads to the doubling of the areal mass density and to a dry film thickness close to 300 nm after 4 (GO/Ce/PP/Ce) tetralayers. The film roughness increases significantly with thickness. The (PP/Ce) films are soft materials with approximately equal shear storage and loss moduli, but the incorporation of GO doubles the storage modulus. PP displays a marked terminating layer effect and practically eliminates mechanical losses, making the (GO/Ce/PP/Ce) films almost pure soft elastomers. The smoothness of the (PP/Ce) films and the PP-termination effects are attributed to the reversible coordinative bonding. The (GO/Ce/PP/Ce) films oxidize pyrrole and 3,4-ethylenedioxythiophene (EDOT) and form polypyrrole and PEDOT films on their surfaces. These polymer films are considerably thicker than those formed using the (PP/Ce) multilayers with the same nominal amount of cerium layers. The GO sheets interfere with the polymerization reaction and make its kinetics biphasic. The (GO/Ce) multilayers without PP are brittle and thin.
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Affiliation(s)
- Mikko Salomäki
- Laboratory
of Materials Chemistry and Chemical Analysis, Department of Chemistry, University of Turku, Vatselankatu 2, FI-20014 Turku, Finland
- Turku
University Centre for Materials and Surfaces (MATSURF), University of Turku, FI-20014 Turku, Finland
| | - Jussi Kauppila
- Laboratory
of Materials Chemistry and Chemical Analysis, Department of Chemistry, University of Turku, Vatselankatu 2, FI-20014 Turku, Finland
| | - Jouko Kankare
- Laboratory
of Materials Chemistry and Chemical Analysis, Department of Chemistry, University of Turku, Vatselankatu 2, FI-20014 Turku, Finland
| | - Jukka Lukkari
- Laboratory
of Materials Chemistry and Chemical Analysis, Department of Chemistry, University of Turku, Vatselankatu 2, FI-20014 Turku, Finland
- Turku
University Centre for Materials and Surfaces (MATSURF), University of Turku, FI-20014 Turku, Finland
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7
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Primo EN, Kogan MJ, Verdejo HE, Bollo S, Rubianes MD, Rivas GA. Label-Free Graphene Oxide-Based Surface Plasmon Resonance Immunosensor for the Quantification of Galectin-3, a Novel Cardiac Biomarker. ACS APPLIED MATERIALS & INTERFACES 2018; 10:23501-23508. [PMID: 29985579 DOI: 10.1021/acsami.8b03039] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We report the first optical biosensor for the novel and important cardiac biomarker, galectin-3 (Gal3), using the anti-Gal3 antibody as a biorecognition element and surface plasmon resonance (SPR) for transducing the bioaffinity event. The immunosensing platform was built at a thiolated Au surface modified by self-assembling four bilayers of poly(diallyldimethylammonium chloride) and graphene oxide (GO), followed by the covalent attachment of 3-aminephenylboronic acid (3ABA). The importance of GO, both as the anchoring point of the antibody and as a field enhancer for improving the biosensor sensitivity, was critically discussed. The advantages of using 3ABA to orientate the anti-Gal3 antibody through the selective link to the Fc region were also demonstrated. The new platform represents an interesting alternative for the label-free biosensing of Gal3 in the whole range of clinically relevant concentrations (linear range between 10.0 and 50.0 ng mL-1, detection limit of 2.0 ng mL-1) with successful application for Gal3 biosensing in enriched human serum samples.
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Affiliation(s)
- Emiliano N Primo
- INFIQC (CONICET), Haya de la Torre s/n, Ciudad Universitaria , X5000HUA Córdoba , Argentina
- Departamento de Fisicoquímica, Facultad de Ciencias Químicas , Universidad Nacional de Córdoba, Ciudad Universitaria , X5000HUA Córdoba , Argentina
| | - Marcelo J Kogan
- Advanced Center for Chronic Diseases (ACCDiS), Facultad de Ciencias Químicas y Farmacéuticas, Departamento de Química Farmacológica y Toxicológica , Universidad de Chile , 8380492 Santiago , Chile
| | - Hugo E Verdejo
- Advanced Center for Chronic Diseases (ACCDiS), División de Enfermedades Cardiovasculares, Facultad de Medicina , Pontificia Universidad Católica de Chile , 7500011 Santiago , Chile
| | - Soledad Bollo
- Advanced Center for Chronic Diseases (ACCDiS), Facultad de Ciencias Químicas y Farmacéuticas, Departamento de Química Farmacológica y Toxicológica , Universidad de Chile , 8380492 Santiago , Chile
| | - María D Rubianes
- INFIQC (CONICET), Haya de la Torre s/n, Ciudad Universitaria , X5000HUA Córdoba , Argentina
- Departamento de Fisicoquímica, Facultad de Ciencias Químicas , Universidad Nacional de Córdoba, Ciudad Universitaria , X5000HUA Córdoba , Argentina
| | - Gustavo A Rivas
- INFIQC (CONICET), Haya de la Torre s/n, Ciudad Universitaria , X5000HUA Córdoba , Argentina
- Departamento de Fisicoquímica, Facultad de Ciencias Químicas , Universidad Nacional de Córdoba, Ciudad Universitaria , X5000HUA Córdoba , Argentina
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8
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Lin P, Zhang Y, Ren H, Wang Y, Wang S, Fang B. Assembly of graphene oxide-formate dehydrogenase composites by nickel-coordination with enhanced stability and reusability. Eng Life Sci 2018; 18:326-333. [PMID: 32624912 DOI: 10.1002/elsc.201700137] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 01/09/2018] [Accepted: 01/25/2018] [Indexed: 12/17/2022] Open
Abstract
Featuring unique planar structure, large surface area and biocompatibility, graphene oxide (GO) has been widely taken as an ideal scaffold for the immobilization of various enzymes. In this regard, nickel-coordinated graphene oxide composites (GO-Ni) were prepared as novel supporters for the immobilization of formate dehydrogenase. The catalytic activity, stability and morphology were studied. Compared with GO, the enzyme loading capacity of GO-Ni was enhanced by 5.2-fold, besides the immobilized enzyme GO-Ni-FDH exhibited better thermostability, storage stability and reuse stability than GO-FDH. GO-Ni-FDH retained 40.9% of its initial activity after 3 h at 60°C, and retained 31.4% of its initial relative activity after 20 days' storage at 4°C. After eight times usages, GO-Ni-FDH maintained 63.8% of its initial activity. Mechanism insights of the multiple interactions of enzyme with the GO-Ni were studied, considering coordination bonds, hydrogen bonds, electrostatic forces, coordination bonds, and etc. A practical and simple immobilization strategy by metal ions coordination for multimeric dehydrogenase was developed.
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Affiliation(s)
- Peng Lin
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian P. R. China
| | - Yonghui Zhang
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian P. R. China
| | - Hong Ren
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian P. R. China
| | - Yixuan Wang
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian P. R. China
| | - Shizhen Wang
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian P. R. China.,The Key Lab for Synthetic Biotechnology of Xiamen City Xiamen University Xiamen Fujian P. R. China
| | - Baishan Fang
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian P. R. China.,The Key Lab for Synthetic Biotechnology of Xiamen City Xiamen University Xiamen Fujian P. R. China
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9
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Wee BH, Wu TF, Hong JD. Facile and Scalable Synthesis Method for High-Quality Few-Layer Graphene through Solution-Based Exfoliation of Graphite. ACS APPLIED MATERIALS & INTERFACES 2017; 9:4548-4557. [PMID: 28094493 DOI: 10.1021/acsami.6b11771] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Here we describe a facile and scalable method for preparing defect-free graphene sheets exfoliated from graphite using the positively charged polyelectrolyte precursor poly(p-phenylenevinylene) (PPV-pre) as a stabilizer in an aqueous solution. The graphene exfoliated by PPV-pre was apparently stabilized in the solution as a form of graphene/PPV-pre (denoted to GPPV-pre), which remains in a homogeneous dispersion over a year. The thickness values of 300 selected 76% GPPV-pre flakes ranged from 1 to 10 nm, corresponding to between one and a few layers of graphene in the lateral dimensions of 1 to 2 μm. Furthermore, this approach was expected to yield a marked decrease in the density of defects in the electronic conjugation of graphene compared to that of graphene oxide (GO) obtained by Hummers' method. The positively charged GPPV-pre was employed to fabricate a poly(ethylene terephthalate) (PET) electrode layer-by-layer with negatively charged GO, yielding (GPPV-pre/GO)n film electrode. The PPV-pre and GO in the (GPPV-pre/GO)n films were simultaneously converted using hydroiodic acid vapor to fully conjugated PPV and reduced graphene oxide (RGO), respectively. The electrical conductivity of (GPPV/RGO)23 multilayer films was 483 S/cm, about three times greater than that of the (PPV/RGO)23 multilayer films (166 S/cm) comprising RGO (prepared by Hummers method). Furthermore, the superior electrical properties of GPPV were made evident, when comparing the capacitive performances of two supercapacitor systems; (polyaniline PANi/RGO)30/(GPPV/RGO)23/PET (volumetric capacitance = 216 F/cm3; energy density = 19 mWh/cm3; maximum power density = 498 W/cm3) and (PANi/RGO)30/(PPV/RGO)23/PET (152 F/cm3; 9 mWh/cm3; 80 W/cm3).
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Affiliation(s)
- Boon-Hong Wee
- Department of Chemistry, Research Institute of Natural Sciences, Incheon National University , 119 Academy-ro, Yeonsu-gu, Incheon, 21022, Republic of Korea
| | - Tong-Fei Wu
- Department of Chemistry, Research Institute of Natural Sciences, Incheon National University , 119 Academy-ro, Yeonsu-gu, Incheon, 21022, Republic of Korea
| | - Jong-Dal Hong
- Department of Chemistry, Research Institute of Natural Sciences, Incheon National University , 119 Academy-ro, Yeonsu-gu, Incheon, 21022, Republic of Korea
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10
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Saeki D, Matsuyama H. Ultrathin and ordered stacking of silica nanoparticles via spin-assisted layer-by-layer assembly under dehydrated conditions for the fabrication of ultrafiltration membranes. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2016.09.056] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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11
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Pan H, Yu B, Wang W, Pan Y, Song L, Hu Y. Comparative study of layer by layer assembled multilayer films based on graphene oxide and reduced graphene oxide on flexible polyurethane foam: flame retardant and smoke suppression properties. RSC Adv 2016. [DOI: 10.1039/c6ra15522g] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Flame retardant multilayer films based on graphene materials were deposited on the surface of flexible polyurethane (FPU) foam by an advanced layer by layer assembly method (hybrid bilayer approach) in an effort to reduce its flammability.
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Affiliation(s)
- Haifeng Pan
- Faculty of Engineering
- China University of Geosciences
- Wuhan 430074
- People's Republic of China
| | - Bihao Yu
- Faculty of Engineering
- China University of Geosciences
- Wuhan 430074
- People's Republic of China
| | - Wei Wang
- State Key Laboratory of Fire Science
- University of Science and Technology of China
- Hefei
- People's Republic of China
| | - Ying Pan
- State Key Laboratory of Fire Science
- University of Science and Technology of China
- Hefei
- People's Republic of China
| | - Lei Song
- State Key Laboratory of Fire Science
- University of Science and Technology of China
- Hefei
- People's Republic of China
| | - Yuan Hu
- State Key Laboratory of Fire Science
- University of Science and Technology of China
- Hefei
- People's Republic of China
- Suzhou Key Laboratory of Urban Public Safety
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12
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Layer-by-layer (LBL) assembly technology as promising strategy for tailoring pressure-driven desalination membranes. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2015.06.038] [Citation(s) in RCA: 117] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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13
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Boott CE, Nazemi A, Manners I. Synthetische kovalente und nichtkovalente zweidimensionale Materialien. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502009] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Charlotte E. Boott
- School of Chemistry, University of Bristol, Bristol, BS8 1TS (Großbritannien)
| | - Ali Nazemi
- School of Chemistry, University of Bristol, Bristol, BS8 1TS (Großbritannien)
| | - Ian Manners
- School of Chemistry, University of Bristol, Bristol, BS8 1TS (Großbritannien)
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14
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Synthetic Covalent and Non-Covalent 2D Materials. Angew Chem Int Ed Engl 2015; 54:13876-94. [DOI: 10.1002/anie.201502009] [Citation(s) in RCA: 140] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 05/18/2015] [Indexed: 11/07/2022]
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15
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Yan N, Capezzuto F, Buonocore GG, Lavorgna M, Xia H, Ambrosio L. Gas-Barrier Hybrid Coatings by the Assembly of Novel Poly(vinyl alcohol) and Reduced Graphene Oxide Layers through Cross-Linking with Zirconium Adducts. ACS APPLIED MATERIALS & INTERFACES 2015; 7:22678-22685. [PMID: 26406566 DOI: 10.1021/acsami.5b07529] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Gas-barrier materials obtained by coating poly(ethylene terephthalate) (PET) substrates have already been studied in the recent literature. However, because of the benefits of using cheaper, biodegradable, and nonpolar polymers, multilayered hybrid coatings consisting of alternate layers of reduced graphene oxide (rGO) nanosheets and a novel high amorphous vinyl alcohol (HAVOH) with zirconium (Zr) adducts as binders were successfully fabricated through a layer-by-layer (LbL) assembly approach. Atomic force microscopy analysis showed that rGO nanoplatelets were uniformly dispersed over the HAVOH polymer substrate. Scanning and transmission electron microscopies revealed that multilayer (HAVOH/Zr/rGO)n hybrid coatings exhibited a brick-wall structure with HAVOH and rGO as buildings blocks. It has been shown that 40 layers of HAVOH/Zr/rGO ultrathin films deposited on PET substrates lead to a decrease of 1 order of magnitude of oxygen permeability with respect to the pristine PET substrate. This is attributed to the effect of zirconium polymeric adducts, which enhance the assembling efficiency of rGO and compact the layers, as confirmed by NMR characterization, resulting in a significant increment of the oxygen-transport pathways. Because of their high barrier properties and high flexibility, these films are promising candidates in a variety of applications such as packaging, selective gas films, and protection of flexible electronics.
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Affiliation(s)
- Ning Yan
- Institute of Polymers, Composites and Biomaterials, National Research Council , Piazzalle Fermi, 1-80055 Portici, Naples, Italy
- Xi'an Modern Chemistry Research Institute , Xi'an 710065, China
| | - Filomena Capezzuto
- Institute of Polymers, Composites and Biomaterials, National Research Council , Piazzalle Fermi, 1-80055 Portici, Naples, Italy
| | - Giovanna G Buonocore
- Institute of Polymers, Composites and Biomaterials, National Research Council , Piazzalle Fermi, 1-80055 Portici, Naples, Italy
| | - Marino Lavorgna
- Institute of Polymers, Composites and Biomaterials, National Research Council , Piazzalle Fermi, 1-80055 Portici, Naples, Italy
| | - Hesheng Xia
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University , Chengdu 610065, China
| | - Luigi Ambrosio
- Institute of Polymers, Composites and Biomaterials, National Research Council , Piazzalle Fermi, 1-80055 Portici, Naples, Italy
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16
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Walch NJ, Davis F, Langford N, Holmes JL, Collyer SD, Higson SPJ. Enhancement of Electrode Performance by a Simple Casting Method Using Sonochemically Exfoliated Graphene. Anal Chem 2015; 87:9273-9. [DOI: 10.1021/acs.analchem.5b01829] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Nik J. Walch
- Cranfield
Biotechnology Centre, Cranfield University, Cranfield, Bedfordshire MK43 0AL, United Kingdom
| | - Frank Davis
- Cranfield
Biotechnology Centre, Cranfield University, Cranfield, Bedfordshire MK43 0AL, United Kingdom
| | - Nathan Langford
- School
of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, B15 2TT, United Kingdom
| | | | - Stuart D. Collyer
- Microarray Ltd, Colworth Science
Park, Sharnbrook, Bedford MK44 1LQ, United Kingdom
| | - Séamus P. J. Higson
- Cranfield
Biotechnology Centre, Cranfield University, Cranfield, Bedfordshire MK43 0AL, United Kingdom
- The University of Chichester, College Lane, Chichester, West Sussex PO19 6PE, United Kingdom
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17
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Komarova NS, Krivenko AG, Stenina EV, Sviridova LN, Mironovich KV, Shulga YM, Krivchenko VA. Enhancement of the Carbon Nanowall Film Capacitance. Electron Transfer Kinetics on Functionalized Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:7129-7137. [PMID: 26043143 DOI: 10.1021/acs.langmuir.5b00391] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The effects of electrochemical oxidation and surfactant adsorption on behavior of vertically oriented carbon-nanowall (CNW)-based electrodes are studied. Electrochemical oxidation is carried out by the electrode polarization in aqueous solutions at high anodic potentials corresponding to water electrolysis, whereas the modification of surface by surfactants is accomplished by the adsorption of molecules characterized by the cage-like structure. Using the methods of cyclic voltammetry and impedancemetry, it is shown that a substantial increase in the capacitance of CNW-based electrodes is observed in both cases (30-50-fold and 3-5-fold, respectively). The as-grown and modified electrodes are characterized by scanning electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy. A substantial increase in a number of oxygen-containing functional groups is observed on the CNW surface after the electrode polarization at high anodic potentials. The kinetics of redox reactions on the CNW film surface is studied by comparing the behavior of systems [Ru(NH3)6](2+/3+), [Fe(CN)6](4-/3-), Fe(2+/3+), and VO3(-)/VO(2+). It is demonstrated that oxidation of nanowalls makes the electron transfer in the redox reaction VO3(-)/VO(2+) and the redox system Fe(2+/3+) considerably easier due to coordination of discharging ions of these systems with the functional groups; however, no such effect is observed for the redox-systems [Fe(CN)6](3-/4-) and [Ru(NH3)6](2+/3+).
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Affiliation(s)
- Natal'ya S Komarova
- †Institute of Problems of Chemical Physics RAS, Academician Semenov Avenue 1, Chernogolovka, Moscow Region 142432, Russia
| | - Alexander G Krivenko
- †Institute of Problems of Chemical Physics RAS, Academician Semenov Avenue 1, Chernogolovka, Moscow Region 142432, Russia
| | - Elena V Stenina
- ‡Chemistry Department, M.V. Lomonosov Moscow State University, Moscow 119991, Russia
| | - Liana N Sviridova
- ‡Chemistry Department, M.V. Lomonosov Moscow State University, Moscow 119991, Russia
| | - Kirill V Mironovich
- §D.V. Skobeltsyn Institute of Nuclear Physics, M.V. Lomonosov Moscow State University, Moscow 119991, Russia
| | - Yuri M Shulga
- †Institute of Problems of Chemical Physics RAS, Academician Semenov Avenue 1, Chernogolovka, Moscow Region 142432, Russia
| | - Victor A Krivchenko
- §D.V. Skobeltsyn Institute of Nuclear Physics, M.V. Lomonosov Moscow State University, Moscow 119991, Russia
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Graphene-polyelectrolyte multilayer film formation driven by hydrogen bonding. J Colloid Interface Sci 2015; 456:32-41. [PMID: 26092114 DOI: 10.1016/j.jcis.2015.05.035] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2015] [Revised: 05/19/2015] [Accepted: 05/19/2015] [Indexed: 11/24/2022]
Abstract
A method for preparing hydrogen bonded multilayer thin films comprised of layer pairs of surfactant stabilized graphene and an anionic polyelectrolyte is described. The films were constructed at low pH using the Layer-By-Layer (LbL) technique, where the adsorption of the cationic polyelectrolyte, polyethyleneimine (PEI) is followed by the sequential alternating adsorption of the anionic polyelectrolyte, polyacrylic acid (PAA) and anionic graphene sheets modified with Pluronic® F108, a polyethylene oxide-polypropylene oxide-polyethylene oxide (PEO-PPO-PEO) surfactant. Quartz Crystal Microbalance (QCM) measurements indicate that film formation was driven by hydrogen bonding between the carboxylic acid group of the PAA and ethylene oxide unit present in the surfactant. QCM measurements and Raman spectra showed evidence of non-linear and linear growth at low and high numbers of adsorbed layers respectively, suggesting overall superlinear film growth. Atomic Force Microscopy (AFM) Quantitative Nanomechanical Mapping (QNM) measurements of the films indicated that the reduced Young's Modulus of the films decreased with increasing numbers of adsorbed layers, reaching a bulk value of 6.07-32.3 MPa for samples with greater than 300 layers of surfactant stabilized graphene and PAA. The films were also shown to deteriorate partially with aqueous solutions at neutral and basic pH. The thin films exhibited features advantageous for use in coatings, such as pH responsiveness in addition to different mechanical properties, surface roughness, and internal structures based on the number of layers adsorbed.
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Wu Y, Cao R, Ji L, Huang W, Yang X, Tu Y. Synergistic toughening of bioinspired artificial nacre by polystyrene grafted graphene oxide. RSC Adv 2015. [DOI: 10.1039/c5ra03074a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
A biologically inspired, multilayer laminate structural design is deployed in composite films of polystyrene (PS) grafted graphene oxide (GO) synthesized by a Ce(iv)/HNO3 redox system in aqueous solution.
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Affiliation(s)
- Yanhong Wu
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- Department of Polymer Science and Engineering
- College of Chemistry
- Chemical Engineering and Materials Science
| | - Rui Cao
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- Department of Polymer Science and Engineering
- College of Chemistry
- Chemical Engineering and Materials Science
| | - Liangliang Ji
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- Department of Polymer Science and Engineering
- College of Chemistry
- Chemical Engineering and Materials Science
| | - Weichun Huang
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- Department of Polymer Science and Engineering
- College of Chemistry
- Chemical Engineering and Materials Science
| | - Xiaoming Yang
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- Department of Polymer Science and Engineering
- College of Chemistry
- Chemical Engineering and Materials Science
| | - Yingfeng Tu
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- Department of Polymer Science and Engineering
- College of Chemistry
- Chemical Engineering and Materials Science
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Rajesh S, Yan Y, Chang HC, Gao H, Phillip WA. Mixed mosaic membranes prepared by layer-by-layer assembly for ionic separations. ACS NANO 2014; 8:12338-12345. [PMID: 25470202 DOI: 10.1021/nn504736w] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Charge mosaic membranes, which possess distinct cationic and anionic domains that traverse the membrane thickness, are capable of selectively separating dissolved salts from similarly sized neutral solutes. Here, the generation of charge mosaic membranes using facile layer-by-layer assembly methodologies is reported. Polymeric nanotubes with pore walls lined by positively charged polyethylenimine moieties or negatively charged poly(styrenesulfonate) moieties were prepared via layer-by-layer assembly using track-etched membranes as sacrificial templates. Subsequently, both types of nanotubes were deposited on a porous support in order to produce mixed mosaic membranes. Scanning electron microscopy demonstrates that the facile deposition techniques implemented result in nanotubes that are vertically aligned without overlap between adjacent elements. Furthermore, the nanotubes span the thickness of the mixed mosaic membranes. The effects of this unique nanostructure are reflected in the transport characteristics of the mixed mosaic membranes. The hydraulic permeability of the mixed mosaic membranes in piezodialysis operations was 8 L m(-2) h(-1) bar(-1). Importantly, solute rejection experiments demonstrate that the mixed mosaic membranes are more permeable to ionic solutes than similarly sized neutral molecules. In particular, negative rejection of sodium chloride is observed (i.e., the concentration of NaCl in the solution that permeates through a mixed mosaic membrane is higher than in the initial feed solution). These properties illustrate the ability of mixed mosaic membranes to permeate dissolved ions selectively without violating electroneutrality and suggest their utility in ionic separations.
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Affiliation(s)
- Sahadevan Rajesh
- Department of Chemical and Biomolecular Engineering and ‡Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556-5637, United States
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Notley SM, Evans DR. Aqueous processing of graphene-polymer hybrid thin film nano-composites and gels. Adv Colloid Interface Sci 2014; 209:196-203. [PMID: 24811424 DOI: 10.1016/j.cis.2014.04.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Revised: 04/03/2014] [Accepted: 04/13/2014] [Indexed: 12/13/2022]
Abstract
Research into the structure, properties and applications of graphene has moved at a tremendous pace over the past few years. This review describes one aspect of this research, that of the incorporation of graphene particles with a range of polymers to create novel hybrid materials with increased functionality such as improved conductance, increased strength and introduced biocompatibility or cytotoxicity. This review focuses on dispersing graphene in polymer matrices, both insulating and conducting. Additionally, a brief discussion of carbon based platelet production methods is given in order to provide context on the subsequent use of this family of materials such as graphene, graphene oxide (GO) and reduced graphene oxide (rGO) incorporated into polymeric thin films.
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Affiliation(s)
- Shannon M Notley
- Dept of Chemistry and Biotechnology, Faculty of Engineering, Science and Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia.
| | - Drew R Evans
- Mawson Institute, University of South Australia, Mawson Lakes, SA 5095, Australia
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