220 results found
Goode AE, Hine NDM, Chen S, et al., Mapping functional groups on oxidised multi-walled carbon nanotubes at the nanometre scale, Chemical Communications, ISSN: 1364-548X
Garcia-Trenco A, White ER, Regoutz A, et al., 2017, Pd2Ga-Based Colloids as Highly Active Catalysts for the Hydrogenation of CO2 to Methanol, ACS CATALYSIS, Vol: 7, Pages: 1186-1196, ISSN: 2155-5435
Gonzalez-Carter DA, Leo BF, Ruenraroengsak P, et al., 2017, Silver nanoparticles reduce brain inflammation and related neurotoxicity through induction of H2S-synthesizing enzymes, SCIENTIFIC REPORTS, Vol: 7, ISSN: 2045-2322
Chemical and electrochemical reduction methods allow the dispersion, processing, and/or functionalization of discrete sp(2)-hybridised nanocarbons, including fullerenes, nanotubes and graphenes. Electron transfer to the nanocarbon raises the Fermi energy, creating nanocarbon anions and thereby activating an array of possible covalent reactions. The Fermi level may then be partially or fully lowered by intended functionalization reactions, but in general, techniques are required to remove excess charge without inadvertent covalent reactions that potentially degrade the nanocarbon properties of interest. Here, simple and effective chemical discharging routes are demonstrated for graphenide polyelectrolytes and are expected to apply to other systems, particularly nanotubides. The discharging process is inherently linked to the reduction potentials of such chemical discharging agents and the unusual fundamental chemistry of charged nanocarbons.
Pike SD, White ER, Regoutz A, et al., 2017, Reversible Redox Cycling of Well-Defined, Ultrasmall Cu/Cu2O Nanoparticles., ACS Nano
Exceptionally small and well-defined copper (Cu) and cuprite (Cu2O) nanoparticles (NPs) are synthesized by the reaction of mesitylcopper(I) with either H2 or air, respectively. In the presence of substoichiometric quantities of ligands, namely, stearic or di(octyl)phosphinic acid (0.1-0.2 equiv vs Cu), ultrasmall nanoparticles are prepared with diameters as low as ∼2 nm, soluble in a range of solvents. The solutions of Cu NPs undergo quantitative oxidation, on exposure to air, to form Cu2O NPs. The Cu2O NPs can be reduced back to Cu(0) NPs using accessible temperatures and low pressures of hydrogen (135 °C, 3 bar H2). This striking reversible redox cycling of the discrete, solubilized Cu/Cu(I) colloids was successfully repeated over 10 cycles, representing 19 separate reactions. The ligands influence the evolution of both composition and size of the nanoparticles, during synthesis and redox cycling, as explored in detail using vacuum-transfer aberration-corrected transmission electron microscopy, X-ray photoelectron spectroscopy, and visible spectroscopy.
Anthony DB, Shaffer MSP, 2016, Process for producing carbon-nanotube grafted substrate, WO 2016009207 A1
The present invention relates to a process for producing a carbon nanotube-grafted substrate, the process comprising: providing a substrate having catalytic material deposited thereon; and synthesising carbon nanotubes on the substrate by a chemical vapour deposition process in a reaction chamber; characterised in that the process comprises providing a counter electrode, applying a potential difference to the substrate in relation to the counter electrode and maintaining the potential difference of the substrate in relation to the counter electrode during the chemical vapour deposition process.
Bayazit MK, Hodge SA, Clancy AJ, et al., 2016, Carbon nanotube anions for the preparation of gold nanoparticle-nanocarbon hybrids, CHEMICAL COMMUNICATIONS, Vol: 52, Pages: 1934-1937, ISSN: 1359-7345
Blaker JJ, Anthony DB, Tang G, et al., 2016, Property and Shape Modulation of Carbon Fibers Using Lasers, ACS APPLIED MATERIALS & INTERFACES, Vol: 8, Pages: 16351-16358, ISSN: 1944-8244
Chen S, Goode AE, Skepper JN, et al., 2016, Avoiding artefacts during electron microscopy of silver nanomaterials exposed to biological environments, JOURNAL OF MICROSCOPY, Vol: 261, Pages: 157-166, ISSN: 0022-2720
Clancy AJ, White ER, Tay HH, et al., 2016, Systematic comparison of conventional and reductive single-walled carbon nanotube purifications, CARBON, Vol: 108, Pages: 423-432, ISSN: 0008-6223
De Marco M, Markoulidis F, Menzel R, et al., 2016, Cross-linked single-walled carbon nanotube aerogel electrodes via reductive coupling chemistry, JOURNAL OF MATERIALS CHEMISTRY A, Vol: 4, Pages: 5385-5389, ISSN: 2050-7488
Diba M, Fam DWH, Boccaccini AR, et al., 2016, Electrophoretic deposition of graphene-related materials: A review of the fundamentals, PROGRESS IN MATERIALS SCIENCE, Vol: 82, Pages: 83-117, ISSN: 0079-6425
Ferguson A, Khan U, Walsh M, et al., 2016, Understanding the Dispersion and Assembly of Bacterial Cellulose in Organic Solvents, BIOMACROMOLECULES, Vol: 17, Pages: 1845-1853, ISSN: 1525-7797
Garcia-Trenco A, White ER, Shaffer MSP, et al., 2016, A one-step Cu/ZnO quasi-homogeneous catalyst for DME production from syn-gas, CATALYSIS SCIENCE & TECHNOLOGY, Vol: 6, Pages: 4389-4397, ISSN: 2044-4753
Govada L, Leese HS, Saridakis E, et al., 2016, Exploring Carbon Nanomaterial Diversity for Nucleation of Protein Crystals, SCIENTIFIC REPORTS, Vol: 6, ISSN: 2045-2322
Herceg TM, Abidin MSZ, Greenhalgh ES, et al., 2016, Thermosetting hierarchical composites with high carbon nanotube loadings: En route to high performance, Composites Science and Technology, Vol: 127, Pages: 134-141, ISSN: 0266-3538
A wet powder impregnation route to manufacture carbon fibre reinforced thermoplastic composites was adapted to accommodate thermosetting matrices reinforced with high fractions (20 wt%/13.6 vol%) of multiwalled carbon nanotubes (CNTs). The produced carbon fibre prepregs were consolidated into laminates with fibre volume fractions of 50–58% and up to 6.1 vol% CNTs. Microscopic imaging confirmed successful consolidation at intermediate CNT loadings, but some voidage at the highest CNT loading due to the highly viscoelastic uncured matrix. Nonetheless, through-thickness electrical conductivity and Mode I interlaminar fracture toughness were enhanced by as much as 152% and 24% to unprecedented values of σ = 53 S m−1 and GIC = 840 J m−2, respectively. Fractographic characterisation indicated that crack deflection was the mechanism responsible for the improved fracture toughness. The material properties were shown to be strongly dependent on the microstructure of the matrix.
Herceg TM, Yoon S-H, Abidin MSZ, et al., 2016, Thermosetting nanocomposites with high carbon nanotube loadings processed by a scalable powder based method, COMPOSITES SCIENCE AND TECHNOLOGY, Vol: 127, Pages: 62-70, ISSN: 0266-3538
Javaid A, Ho KKC, Bismarck A, et al., 2016, Carbon fibre-reinforced poly(ethylene glycol) diglycidylether based multifunctional structural supercapacitor composites for electrical energy storage applications, JOURNAL OF COMPOSITE MATERIALS, Vol: 50, Pages: 2155-2163, ISSN: 0021-9983
Lee WJ, Clancy AJ, Kontturi E, et al., 2016, Strong and Stiff: High-Performance Cellulose Nanocrystal/Poly(vinyl alcohol) Composite Fibers, ACS Applied Materials & Interfaces, Vol: 8, Pages: 31500-31504, ISSN: 1944-8244
Leese HS, Govada L, Saridakis E, et al., 2016, Reductively PEGylated carbon nanomaterials and their use to nucleate 3D protein crystals: a comparison of dimensionality, CHEMICAL SCIENCE, Vol: 7, Pages: 2916-2923, ISSN: 2041-6520
Liberti E, Menzel R, Shaffer MSP, et al., 2016, Probing the size dependence on the optical modes of anatase nanoplatelets using STEM-EELS, NANOSCALE, Vol: 8, Pages: 9727-9735, ISSN: 2040-3364
Mansor N, Miller TS, Dedigama I, et al., 2016, Graphitic Carbon Nitride as a Catalyst Support in Fuel Cells and Electrolyzers, ELECTROCHIMICA ACTA, Vol: 222, Pages: 44-57, ISSN: 0013-4686
Menzel R, Iruretagoyena D, Wang Y, et al., 2016, Graphene oxide/mixed metal oxide hybrid materials for enhanced adsorption desulfurization of liquid hydrocarbon fuels, FUEL, Vol: 181, Pages: 531-536, ISSN: 0016-2361
Pike SD, White ER, Shaffer MSP, et al., 2016, Simple phosphinate ligands access zinc clusters identified in the synthesis of zinc oxide nanoparticles, NATURE COMMUNICATIONS, Vol: 7, ISSN: 2041-1723
Ruenraromgsak P, Chen S, Hu S, et al., 2016, Translocation of Functionalized Multi-Walled Carbon Nanotubes across Human Pulmonary Alveolar Epithelium: Dominant Role of Epithelial Type 1 Cells, ACS NANO, Vol: 10, Pages: 5070-5085, ISSN: 1936-0851
Sehmi SK, Noimark S, Pike SD, et al., 2016, Enhancing the Antibacterial Activity of Light-Activated Surfaces Containing Crystal Violet and ZnO Nanoparticles: Investigation of Nanoparticle Size, Capping Ligand, and Dopants., ACS Omega, Vol: 1, Pages: 334-343
Healthcare-associated infections pose a serious risk for patients, staff, and visitors and are a severe burden on the National Health Service, costing at least £1 billion annually. Antimicrobial surfaces significantly contribute toward reducing the incidence of infections as they prevent bacterial adhesion and cause bacterial cell death. Using a simple, easily upscalable swell-encapsulation-shrink method, novel antimicrobial surfaces have been developed by incorporating metal oxide nanoparticles (NPs) and crystal violet (CV) dye into medical-grade polyurethane sheets. This study compares the bactericidal effects of polyurethane incorporating ZnO, Mg-doped ZnO, and MgO. All metal oxide NPs are well defined, with average diameters ranging from 2 to 18 nm. These materials demonstrate potent bactericidal activity when tested against clinically relevant bacteria such as Escherichia coli and Staphylococcus aureus. Additionally, these composites are tested against an epidemic strain of methicillin-resistant Staphylococcus aureus (MRSA) that is rife in hospitals throughout the UK. Furthermore, we have tested these materials using a low light intensity (∼500 lx), similar to that present in many clinical environments. The highest activity is achieved from polymer composites incorporating CV and ∼3 nm ZnO NPs, and the different performances of the metal oxides have been discussed.
Sweeney S, Hu S, Ruenraroengsak P, et al., 2016, Carboxylation of multiwalled carbon nanotubes reduces their toxicity in primary human alveolar macrophages, ENVIRONMENTAL SCIENCE-NANO, Vol: 3, Pages: 1340-1350, ISSN: 2051-8153
Sweeney S, Leo BF, Chen S, et al., 2016, Pulmonary surfactant mitigates silver nanoparticle toxicity in human alveolar type-I-like epithelial cells, COLLOIDS AND SURFACES B-BIOINTERFACES, Vol: 145, Pages: 167-175, ISSN: 0927-7765
Woodward RT, Fam DWH, Anthony DB, et al., 2016, Hierarchically porous carbon foams from pickering high internal phase emulsions, CARBON, Vol: 101, Pages: 253-260, ISSN: 0008-6223
Zhang JJ, Lee K-B, He L, et al., 2016, Effects of a nanoceria fuel additive on the physicochemical properties of diesel exhaust particles, ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS, Vol: 18, Pages: 1333-1342, ISSN: 2050-7887
This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters. You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters.