Materials Literature
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The effect of specific surface area (SSA) and the purity of Fe2O3were investigated while evaluating the raw material of Sr-hexaferrite preparation. For anisotropic hard ferrite, both SSA and purity of Fe2O3were found, which markedly affect the grain growth and the magnetic properties. Increase of SSA in Fe2O3resulted…
A series of cardo poly(ether sulfone imide)s (PESI-C) containing bulky phthalide groups were prepared via aromatic nucleophilic substitution reaction of phenolphthalein with 4,4′-difluorodiphenyl sulfone and 4,4′-bis(4-fluorophthalimido)diphenyl ether (BFPI). The glass transition temperatures and 5% weight loss temper…
NIST in Boulder, CO investigated the correlations between impact test results obtained from standard, full-size Charpy V-notch (CVN) specimens and specimens with reduced thickness (subsize Charpy V-notch specimens (SCVN)) or reduced or scaled cross section dimensions (miniaturized Charpy V-notch specimens (MCVN)). A d…
Iijima's 1991 discovery brought to the attention of the research community a new allotrope of carbon: carbon nanotubes (CNTs).Since then CNTs have been extensively studied and have demonstrated to be of great potential in various industrial and biomedical fields of application [1].CNTs can be described as rolled-up sh…
Abstract A tri-layered composite structure of gold/ZnS/gold, with the top gold layer patterned into a periodic array of circular holes, was fabricated by laser interference lithography and lift-off processes. This plasmonic composite absorbing structure showed a series of enhanced absorption peaks across the visible t…
A series of metal cation modified layered-double hydroxides (LDHs) and mixed oxides were prepared and used to be the selective oxidation of toluene with O2. The results revealed that the modified LDHs exhibited much higher catalytic performance than their parent LDH and the modified mixed oxides. Moreover, the metal c…
Abstract New iron(II) coordination polymers with solvent‐dependent spin‐crossover behaviour have been synthesised by using an N2O2 Schiff base like ligand and 4,4′‐dipyridylethyne as the bridging axial ligand in different solvents. The effects of different solvents and preparation methods (temperature, concentration)…
Abstract A periodic mesoporous organosilica (PMO) that contains ethylene bridges was functionalized to obtain a series of cooperative acid–base catalysts. A straightforward, single‐step procedure was devised to immobilize cysteine and cysteamine on the support material by means of a photoinitiated thiol‐ene click reac…
Diameter control in the synthesis of single-walled carbon nanotube (SWNT) arrays is vital to the control of their properties and their integration into practical devices. Controlling the size of catalyst nanoparticles (NPs) and following a tangential nucleation mode has been shown to be an effective approach to diamet…
Abstract A Magnetic mFe3O4‐l‐dopa‐CuII/SnIV@micro‐mesoporous‐SiO2 catalyst was successfully prepared. The catalyst exhibits high and stable catalytic activity for the Baeyer–Villiger oxidation reaction with air as oxidant. Furthermore, the selectivity can reach nearly 100 %. Meanwhile the catalyst can be easily separa…
Electrospinning of sulfur-free softwood lignin (SFSL) in N,N-dimethylformamide (DMF) is reported as is and with poly(ethylene oxide) (PEO). SFSL macromolecules behave as rigid spheres, instead of free draining macromolecules in DMF. Hence they are investigated as colloids. Colloidal SFSL generates uniform fibers only…
${\mathrm{NiS}}_{2\ensuremath{-}2x}{\mathrm{Se}}_{x}$ is revisited to determine the magnetic structure using neutron diffraction and magnetic representational analysis. Upon cooling, the insulating parent compound, ${\mathrm{NiS}}_{2}$, becomes antiferromagnetic with two successive magnetic transitions. The first tran…
Compresed BiTeBr has been studied from a joint experimental and theoretical perspective. Room-temperature x-ray diffraction, Raman scattering, and transport measurements at high pressures have been performed in this layered semiconductor and interpreted with the help of ab initio calculations. A reversible first-order…
In this work, a methodology to evaluate and represent the wettability alteration phenomenon caused by the action of organosilane surfactants using molecular dynamics simulations is presented. This methodology is based on four major steps: (i) the tuning of the energetic parameter of the surface potential to achieve an…
Abstract Spontaneous formation of concentric lamellae was observed in self‐assembling giant surfactants consisting of a fluorinated polyhedral oligomeric silsesquioxane (FPOSS) head and flexible polymer tail(s). Owing to the asymmetrical sizes of the head and tail blocks and the rectangular molecular interface, the gi…
To analyze the process of jet penetration in water medium quantitatively, the properties of jet penetration spaced target with water interlayer were studied through test and numerical simulation. Two theoretical models of jet penetration in water were proposed. The theoretical model 1 was established considering the i…
The performance of LEDs with Ga‐doped ZnO (Ga:ZnO) and Sn‐doped In 2 O 3 (ITO) current‐spreading layers (CSLs) has been evaluated at high injection current densities. LEDs with electron beam‐hydrothermally deposited Ga:ZnO transparent CSLs showed improved performance compared to electron beam deposited ITO at all curr…
We report an experimental analysis of attenuation and fluorescence (at low-power 750-nm excitation) spectra’ transformations in yttria-alumino-silicate fiber doped with Bismuth (Bi), which occur at higher than room, but not exceeding 700°C, temperatures. As well, we address impact of elevating temperature upon the fib…
The synthesis, characterization and application of biologically synthesized nanomaterials have become the prime area of study in nanotechnology. Green synthesis of nanoparticles using plant extracts is being explored globally owing to the absence of disadvantages associated with conventional methods. This study report…
Biomass-derived nitrogen-doped carbon (BDNDC) is attracting increasing attention as a sustainable approach for potential application in energy conversion and storage. The use of BDNDC as a matrix to embed metal oxide nanoparticles has seldom been reported, even though such composites may possess the merits of both com…