Materials Literature
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We perform first-principles density-functional theory calculations to investigate the atomic structures and electronic properties of dopant complexes involving Al, Ga, and N in wurtzite ZnO. We find that both Al and Ga substituted on Zn sites act as single donors and exhibit a strong attractive interaction with a nitr…
Poria cocos is an important Oriental medical fungus with multiple functionalities, yet its bioactive substances and the mechanisms involved have not been fully characterized. A novel immunomodulatory protein (P. cocos immunomodulatory protein; PCP) was purified from the dried sclerotium of P. cocos (Schw.) Wolf using…
A series of spacer-free ionic azobenzene-containing stoichiometric complexes was prepared from monosulfonated azo dyes and cationic polyelectrolytes [methylated poly(4-vinylpyridine) (PVP) and poly(dimethylaminoethyl methacrylate) (PDM)]. Their thermal and structural characteristics and optical responses, particularly…
Seawater aging response was investigated in marine-grade glass/epoxy, glass/vinyl ester, carbon/epoxy and carbon/vinyl ester composites with respect to water uptake, interlaminar shear strength, flexural strength, tensile strength, and tensile fracture surface observations. The reduction of mechanical properties was f…
The purpose of this work was to investigate the kinetic pathways in the phase solubility diagram of a cocrystallization process in solution. A cocrystal model composed of an active pharmaceutical ingredient (carbamazepine, CBZ) and a vitamin (nicotinamide, NCT) was selected. Batch experiments were performed in a stirr…
Abstract BACKGROUND: Decay caused by fungal pathogens is responsible for significant economic loss of grape fruit in vineyards worldwide. However, postharvest treatment is not advisable for this fruit owing to its thin waxy pericarp and succulent flesh, which are easily damaged. Therefore preharvest treatment even at…
Six metastable polymorphs ( V, VII − XI ) of phenobarbital (Pbtl) were produced by melt crystallization via seeding with corresponding isomorphic barbiturate homologues, following the teachings of earlier thermoanalytical studies of isopolymorphic relationships and utilizing the melting phase diagrams of Pbtl admixtur…
Amorphous V 2 O 5 films were prepared on glass substrates at room temperature by magnetron sputtering and converted to β-V 2 O 5 nanorods by subsequent annealing in O 2 flux. X-ray absorption near-edge spectroscopy and photoelectron spectroscopy with synchrotron radiation have been applied to confirm whether the nanor…
The solubility and diffusivity of carbon dioxide (CO 2 ) in the solid-state isotactic polypropylene (iPP) were studied by using the pressure−decay method at temperatures of 373.15, 398.15, and 423.15 K and pressures ranging from 1 to 15 MPa. The solubilities of CO 2 in the solid-state and amorphous regions of iPP were…
We have discovered new arsenide oxides (Fe 2 As 2 )(Sr 4 M 2 O 6 ) (M = Sc, Cr: M-22426). These materials are isostructural with (Fe 2 P 2 )(Sr 4 Sc 2 O 6 ), which was found in our previous study. The new compounds are tetragonal with a space group of P 4/ nmm and consist of the anti-fluorite-type FeAs layer and a per…
In this manuscript, we investigate the sintering behavior of (K,Na)NbO 3 (KNN)‐based ceramics covering unmodified KNN, (K,Na,Li)NbO 3 (KNLN), and KNLN– x BaTiO 3 (KNLN–BT) systems. Three stages of sintering were identified using detailed temperature and time dependent microscopy. The first stage corresponds to rearran…
Hybrid composites of glass and banana fiber (obtained from the pseudo stem of Musa sapientum) in polyester matrix, are subjected to dynamic mechanical analysis over a range of temperature and three different frequencies. The effect of temperature on the storage modulus (E ′ ), loss modulus (E ′′ ), and loss factor or…
We employ a homogenization technique based on the Lorentz electronic theory to show that planar chiral structures (PCSs) can be described by an effective dielectric tensor similar to that of biaxial elliptically dichroic crystals. Such a crystal is shown to behave like a PCS insofar as it exhibits its characteristic o…
The synthesis and single crystal growth of clathrate-II Na(24)Si(136) is performed in one step applying the spark plasma treatment to the precursor Na(4)Si(4). The reported results demonstrate a new route to intermetallic compounds facilitated by the electric field and current. SPS is revealed to offer significant opp…
Abstract In the present study, different series of high‐density polyethylene (HDPE) nanocomposites were prepared by melt mixing on a Haake‐Buchler Reomixer, containing 2.5 wt % of multiwall carbon nanotubes, pristine and modified montmorillonite, surface‐treated and ‐untreated SiO 2 nanoparticles. From transmission el…
Three new mu4-bridged Co(II)5 clusters with similar core motifs have been synthesised with the use of N-tert-butyldiethanolamine (tbdeaH2) and pivalic acid (piv): [Co(II)5(mu4-N3)(tbdea)2(mu-piv)4(piv)(CH3CN)2].CH3CN (1), [Co(II)5(mu4-Cl)(Cl)(tbdea)2(mu-piv)4(pivH)2] (2) and [Co(II)5(mu4-N3)(Cl)(tbdea)2(mu-piv)4(pivH)…
In this paper, metal-enhanced fluorescence (MEF) from 6-propionyl-2-dimethylaminonaphthalene (Prodan) in different solvents when placed in close proximity to silver island films (SIFs), surface-deposited nanoparticles, is studied. We observe that MEF is wavelength dependent: the enhanced emission of Prodan on SIFs in…
Cation-exchangeable d(0) layered perovskites are amenable to intercalation, exfoliation, and a variety of topochemical reactions, but they lack the interesting electronic and magnetic functionalities of mixed-valent perovskites. Conversely, electronically and magnetically interesting layered perovskites lack scope in…
A magnetic tunnel junction sensor is proposed, with both the detection and the reference layers pinned by IrMn. Using the differences in the blocking temperatures of the IrMn films with different thicknesses, crossed anisotropies can be induced between the detection and the reference electrodes. The pinning of the sen…
Jute fiber (hessian cloth)-reinforced polypropylene matrix composites (50 wt% fiber) were fabricated by compression molding. Tensile strength, tensile modulus, bending strength, bending modulus, and impact strength of the composites were found to be 48 MPa, 2.5 GPa, 56 MPa, 4.5 GPa, and 18 kJ/m 2 , respectively. Then…