Materials Literature
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Multi-walled carbon nanotube (CNT) structures, including unidirectionally aligned sheets and spun yarns, were fabricated by direct dry-spinning methods from spinnable CNT arrays. We improved the mechanical properties of the CNT structures. CNTs were tailored in sheets and yarns using perfluorophenyl azide (PFPA) as a…
Abstract The latest developments of industrial crystallization in China are reviewed. This includes the introduction of representative scientists and institutions promoting the progress of Chinese industrial crystallization. Additionally, primary application fields related to industrial crystallization are outlined to…
Abstract Three different surfactants based on fatty acids (octanoic, tridecanoic and oleic) and ethylenediamine were synthesized and their chemical structures were confirmed by FT-IR, 1H-NMR and 13C-NMR spectroscopy. The surface-active properties of the prepared surfactants were determined by using interfacial tension…
Abstract The Raman features of neptunium dioxide (NpO2) and uranium?neptunium mixed oxides were investigated. Raman spectra of 16O and 17O-NpO2 enriched sample were measured with excitation energy range of Ei = 1.91?2.54 eV. Raman spectra of both NpO2 samples and the uranium?neptunium rich mixed oxides show an asymmet…
Growth of few-layer graphene using ferrocene as precursor by chemical vapor deposition is reported. The growth did not involve any additional carbon or catalyst source or external hydrocarbon gases. Parametric investigation was performed using different conditions, namely, varying growth temperature from 600 to1000 °C…
The substitution of rare-earth elements (REEs) for Pb in the lacunary apatite Pb8Na2(PO4)6 with void structural channels was studied by means of powder X-ray diffraction (including the Rietveld refinement), scanning electron microscopy, energy-dispersive X-ray microanalysis, and IR spectroscopy and also measurements o…
Enhancement of magnetic performance of the Nd-Fe-B-type die-upset magnet by using RF3(R = Dy, Pr, Nd, Ce, La)-doping as a source of rare-earth substituent was investigated. Commercial melt-spun flakes of Nd13.6Fe73.6Co6.6Ga0.6B5.6were mixed with 1.6 wt.% RF3(R = Dy, Pr, Nd, Ce, La) powder. The mixture was hot pressed…
Y-doped barium cerate BaCe0.9Y0.1O3 − δ was synthesised by a solid-state reaction method. Materials with different average grain sizes and grain boundary surface areas were obtained. The effect of microstructure on the chemical stability in the CO2 and H2O-containing atmosphere and electrical properties was analysed a…
We show that the flexoelectric model of chiral and achiral modulated nematics predicts the compression modulus that is by orders of magnitude lower than the measured values. The discrepancy is much larger in the chiral modulated nematic phase, in which the measured value of the compression modulus is of the same order…
In the design process of permanent magnet synchronous motors (PMSMs), the hysteresis torque has so far been ignored under the understanding that it is already small enough. However, for some delicate applications, such as an exoskeleton wearable robot, the hysteresis torque, whose proportion increases under no-load or…
Knots are fascinating topological elements, which can be found in both natural and artificial systems. While in most of the cases, knots cannot be loosened without breaking the strand where they are tightened, herein, attention is focused on slip or running knots, which on the contrary can be unfastened without compro…
Core-shell fibers are emerging as interesting microstructures for the controlled release of drugs, proteins, and complex biological molecules, enabling the fine control of microreservoirs of encapsulated active agents, of the release kinetics, and of the localized delivery. Here we load luminescent molecules and enhan…
A novel amorphous carbon thin film (ACTF) was prepared by hydrolyzing wood sawdust and delignificating the residue to obtain cellulose mass that was subjected to react with cobalt silicate nanoparticle as a catalyst under the influence of sudden concentrated sulfuric acid addition at 23 °C. The novel ACTF was obtained…
An efficient synthetic method for magnetically recoverable hybrid copper porphyrinic nanomaterials is reported. These functionalized magnetic materials prove to be efficient bioinspired oxidation catalysts of olefins and thiols, using molecular oxygen as oxidant, in total absence of reductants and solvents, with the h…
Observation of replica bands in the angle-resolved photoemission spectroscopy (ARPES) spectra of single-layer FeSe on a strontium titanate substrate revealed a phonon component contribution to mechanisms behind its high-${T}_{c}$ superconductivity. We study the interaction of the in-layer FeSe electrons with the elect…
White-light-emitting Ca 4– x F 2 Si 2 O 7: x Ce 3+ phosphor and violet-light-emitting oxyfluoride Ca 4 F 2 Si 2 O 7 host were synthesized by solid-state reaction. Ca 4– x F 2 Si 2 O 7: x Ce 3+ has strong absorption in the near-UV region (370 nm) and shows a broad emission in the range of 390–600 nm centered at 475 nm.…
Abstract Four active components, oregano essential oil ( OR ) and its respective main compound carvacrol ( CA ) and clove essential oil ( CLO ) and its respective main compound eugenol ( EU ), were used separately to obtain, using compression moulding, poly[(3‐hydroxybutyrate)‐ co ‐(3‐hydroxyvalerate)] ( PHBV ) bilaye…
Deoxygenation and decomposition of ethers and esters, including anisole, diisopropyl ether (DPE), and ethyl propanoate (EP), was investigated using bifunctional metal–acid catalysis at a gas–solid interface in the presence and absence of hydrogen. The bifunctional catalysts studied comprised Pt, Ru, Ni, and Cu as the…
Novel columnar liquid crystals whose molecular structures consist of a C3 star-shaped 1,3,5-triazine unit as a central core, and three pendant 2-phenyl-5-(di-, and/or tri-n-alkoxyphenyl)-1,3,4-thiadiazole arms, containing ether connecting groups, variable number and positions of linear alkoxy chains were synthesised a…
SrAl2O4 doped with europium and dysprosium is a powerful and widely used afterglow material. Within this material strontium is found in two crystallographic different sites. Due to the similar ion radii and same charge, Eu2+-ions can occupy both sites, resulting in two different Eu2+-ions, one emitting in the blue and…