Materials Literature
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Amplified spontaneous emission under millisecond pulsed excitation on a rotaxane-insulated conjugated polymer is reported. Pump-probe spectroscopy confirms the absence of polaron-pair absorption in the gain spectral region as the main factor contributing to quasi-steady-state amplified spontaneous emission. The low po…
Soft magnetic components in electronic systems are often subjected to dc bias-flux conditions. These dc bias conditions result in distorted hysteresis loops, increased core losses, and have been shown to be independent of core material. The physical origin of these increased losses is not well understood and there is…
BaCe x Ti1− x O3 (x = 0.06, 0.10, and 0.20) solid solutions were prepared via conventional the solid-state reaction and sintered at 1500°C for 4 h, resulting in dense single phase ceramics with homogeneous microstructures. The electric field dependence of permittivity of the BaCe x Ti1− x O3 ceramics was investigated…
Two similarly stoichiometric borate halides, NaBa 4 (AlB 4 O 9 ) 2 Br 3 and NaBa 4 (B 5 O 9 ) 2 F 2 Cl, have been successfully designed and synthesized, and their structures were determined by single-crystal X-ray diffraction. Their crystal structures feature the [AlB 4 O 9 ] ∞ and [B 5 O 9 ] ∞ networks, respectively.…
An as-cast nickel aluminum bronze (NAB) was treated by friction-stir processing (FSP). Immersion test and electrochemical measurements under cavitation erosion condition were carried out to investigate the long-term and short-term corrosion behaviors of the as-cast and as-FSP NAB. Cavitation erosion tests were conduct…
Insight into microstructural features in commercial alnico alloys is revealed through electron microscopy. Significant differences were found in the chemical make-up of the primary phases and their distributions for the different classes of the alloys. Changes in the Co + Fe : Al + Ni and minor alloying elements shift…
Intrinsically chiral thiolate-protected gold clusters were recently separated into their enantiomers, and their circular dichroism (CD) spectra were measured. Introduction of the chiral R -1,1′-binaphthyl-2,2′-dithiol (BINAS) into the ligand layer of rac -Au 38 (2-PET) 24 clusters (2-PET: 2-phenylethylthiolate, SCH 2…
A set of polyhydroxyalkanoates are synthesized, and a comparative study of their physicochemical properties is performed. The molecular masses and polydispersities of polyhydroxyalkanoates are found to be independent of their chemical structures. It is shown that the temperature characteristics and degrees of crystall…
Using molecular-dynamics simulations of tensile deformation and shear loading tests, we determine the mechanical properties of superlattices of diamond-like nanocrystals embedded in twisted bilayer graphene (TBG) generated by covalent interlayer bonding through patterned hydrogenation. We find that the mechanical prop…
The inhibition effect of some synthetic aromatic nitro compounds on the corrosion of carbon steel in 1 M HCl solution was studied using galvanostatic and potentiodynamic anodic polarization measurements. The percentage inhibition efficiency was found to increase with increasing the concentration of inhibitors and decr…
Nanocrystalline Ni x Fe 1− x Fe 2 O 4 ( x = 0, 0.1, 0.2, 0.3 and 0.5) ferrite powder samples with particle size 8–16 nm are synthesized using the chemical co-precipitation method. X-ray diffraction pattern confirms the inverse spinel structure. The lattice constant of Ni-substituted samples is increased as compared to…
The toxicity effect due to chronic exposure of ZnO nanoparticles (NPs) was systematically studied by repeatedly treating different lower concentrations of ZnO nanoparticles with culture media of E. coli strain. The chronic exposure of ZnO NPs of concentrations below minimum inhibitory concentration (MIC) exhibited hig…
Effects of alloying and transmutation impurities on stability and mobility of helium in tungsten under a fusion environment, Wu, Xuebang, Kong, Xiang-Shan, You, Yu-Wei, Liu, C.S., Fang, Q.F., Chen, Jun-Ling, Luo, G.-N., Wang, Zhiguang
Composites are one of the most advanced and adaptable engineering materials. The strength of any composite depends upon volume/weight fraction of reinforcement, L/D ratio of fibers, orientation angles and other factors. The present work focuses on determination of mechanical properties of pure epoxy and random oriente…
A nanoscale, visible-light, self-sensing stress probe would be highly desirable in a variety of biological, imaging, and materials engineering applications, especially a device that does not alter the mechanical properties of the material it seeks to probe. Here we present the CdSe-CdS tetrapod quantum dot, incorporat…
Pressed for time: Amorphous calcium carbonate (ACC) undergoes a reversible amorphous–amorphous phase transition at 10 GPa, adopting an aragonite-like local order. This result suggests a mechanism by which Mg2+—a cation with smaller ionic radius than Ca2+—modifies the local order of ACC to an aragonite-like order by he…
Electrochemical studies on the corrosion of API X65 pipeline steel after its immersions in 3.5% sodium chloride solutions for 1 h and 24 h have been reported by using open-circuit potential (OCP), cyclic potentiodynamic polarization (CPP), chronoamperometric current-time (CT) at -500 mV vs. Ag/AgCl and electrochemical…
An effective way to improve the catalytic activity of metal‐based nanostructured materials is to control the size, shape, or composition. Here, the bimetallic PdPt nanoparticles (NPs) show significant dependency on the shape for catalytic hydrolysis of ammonia borane. The catalytic activity of PdPt cubic nanoparticles…
In this paper, the effect of low energy irradiation on mono-layer graphene was studied. Mono-layer graphene films were irradiated with B, N and F ions at different energy and fluence. X-ray photoelectron spectroscopy indicates that foreign ions implanted at ion energies below 35 eV could dope into the graphene lattice…
Poly(D,L-lactic-co-glycolic acid) (PLGA) is the most frequently used bioresorbable polymer for the controlled release of drugs. Hydrophilic additives such as poly(ethylene glycol) (PEG) are commonly incorporated into PLGA to enhance the release of hydrophobic drugs such as paclitaxel (PCTX). Understanding the factors…