Materials Literature
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A novel high flux bright light-driven high temperature spinning disc processor operating at ∼720 °C can effectively synthesise carbon nanofibres from fructose, a natural feedstock, in polyethylene glycol-200, within minutes and with multiple reactor passes being a pivotal operating parameter in controlling the growth…
Curcumin associated poly(allylamine hydrochloride) cross-links with dipotassium phosphate and subsequently is assembled with ∼24 nm SiO2 nanoparticles to form hierarchically ordered nanocapsule structures, which are 100–1000 nm in size depending on the concentration of dipotassium phosphate. These structures reverse t…
The thermal expansion and magnetic behaviors of divalent, alkaline‐doped lanthanum ferrites ( La 0.9 M 0.1 FeO 3 , M = Ca , Sr , Ba ) were assessed using a combination of dilatometry, magnetometry, time‐of‐flight neutron diffraction, and high‐temperature X‐ray diffraction. Néel temperatures were determined through vib…
The increasing use of diamond cutting tools necessitates the development of compatible fabrication technologies for the diamond tools, especially for three-dimensional surfaces with micron scale accuracy and good surface quality. In this article, the formation mechanism of surfaces milled using a nanosecond pulsed las…
Abstract Hexagonal 1D AlN whiskers were synthesized by direct nitridation of aluminum and alumina. The effect of the atmosphere was investigated based on thermodynamic calculation. A green body compacting alumina with different particle size in between 44–420 μm in graphite crucible was found to be favorable for the l…
We report the cobalt doping dependencies of the ferroelectric polarization and underlying incommensurate spiral magnetic ordering in multiferroic Mn<sub>1-<em>x</em></sub>Co<sub><em>x</em></sub>WO<sub>4</sub> (0 ≤ <em>x</em> < 0.18). The spiral ordering changed its rotational plane upon cobalt doping (<em>x</em> ~…
We investigate the electronic state and the superconductivity in the 5-orbital Hubbard model for iron pnictides by using the dynamical mean-field theory in conjunction with the Eliashberg equation. The renormalization factor exhibits significant orbital dependence resulting in the large change in the band dispersion a…
Abstract Cell migration plays a crucial role in a variety of physiological and pathological processes. In this study a method of capillary force lithography was used to treat poly(sodium 4‐styrenesulfonate) (PSS)/poly(diallyldimethylammonium) chloride (PDADMAC) multilayers with a PDMS stamp before or after etching by…
Abstract In this work, stereocomplex‐poly( l ‐ and d ‐lactide) (sc‐PLA) was incorporated into poly(ε‐caprolactone) (PCL) to fabricate a novel biodegradable polymer composite. PCL/sc‐PLA composites were prepared by solution casting at sc‐PLA loadings of 5–30 wt %. Differential scanning calorimetry (DSC) and wide‐angle…
ABSTRACT An anthracene‐containing poly(arylene‐ethynylene)‐ alt ‐poly(arylene‐vinylene) (PAE‐PAV) of general constitutional unit (PhCCAnthrCCPhCHCHAnthrCHCH) n bearing two 2‐ethylhexyloxy solubilizing side chains on each phenylene (Ph) unit has been synthesized and characterized. The basic electrochemical…
In this study, Schiff base monomer, 2-[(1H-pyrrol-2-yl-methylene)amino]phenol (2-PMAP) was obtained by condensation reaction of 2-aminophenol with pyrrole-2-carbaldehyde. This monomer was oxidized in an aqueous alkaline medium by NaOCl to obtain the corresponding oligomer (O-2-PMAP). The resulting compounds were chara…
A comprehensive first-principles theoretical study of the electronic properties and half-metallic nature of zigzag edge-oxidized graphene quantum dots (GQDs) is carried out by using density functional theory (DFT) with the screened exchange hybrid functional of Heyd, Scuseria and Ernzerhof (HSE06). The oxidation schem…
Hemp, jute and lyocell fibres were incorporated into polylactic acid via twin-screw extrusion using three screw configurations, with varying lengths of mixing sections, in order to reduce the levels of shear and fibre attrition. When mixing zones were reduced, the measured fibre lengths increased and as a result the t…
Kenaf and sisal fibres were selected for the development of natural fibre-reinforced thermoplastic composites because they are in abundance in South Africa. These materials can be used in the building industry, where good mechanical and fire resistance properties are required for structural and non-structural applicat…
An easy and rapid intermittent microwave heating (IMH) method was developed for the synthesis of Ag nanostructures with high yields within the short time of 2 minutes. A Ag–DT (dodecanethiol) complex with sheet-like structure was used as precursor. After an IMH treatment of the solid Ag–DT, Ag nanoparticles (NPs) with…
Perovskite oxides MTiO3 (M = Ba, Sr and Ca) with various phase, size, and shape were systematically prepared by solvothermal method in H2O/glycols mixed solutions. Shape control of the BaTiO3 and SrTiO3 particles was achieved by choice of glycols, and anisotropic rod-shaped fine BaTiO3 particles with a tetragonal crys…
Abstract Mathematical modeling for 5‐fluorouracil (5‐FU) nanoparticle synthesis via gas antisolvent (GAS) process was investigated. 5‐FU was precipitated from a dimethyl sulfoxide (DMSO) solution using CO 2 as antisolvent. The particle size was controlled by nucleation and growth rates, therefore, the kinetic modeling…
Defect rich seed mediated growth is reported for synthesising different sized ZnO QDs with enhanced and size tunable defect emission.
Hydrogen being a cleaner energy carrier has increased the importance of hydrogen-containing light metal hydrides, in particular those with large gravimetric hydrogen density like magnesium hydride (MgH2). In this study, density functional and density functional perturbation theories are combined to investigate the str…
Ordered copper integrated mesoporous silicate catalysts (CuMSC) have been synthesized by the utilization of the amphiphilic tri-block copolymer pluronic F127 as a structure directing agent (SDA) under acidic aqueous conditions. The mesophase of the materials was investigated using small-angle powder X-ray diffraction…