Materials Literature
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Magnetic properties of Pr3+ doped Sm0.5Sr0.5MnO3 manganite with the variation of particle size down to 30 nm have been investigated in detail. We have critically examined the magnetic field (H) dependence of the order of the ferromagnetic (FM) to paramagnetic (PM) phase transition in this Sm0.35Pr0.15Sr0.5MnO3 mangani…
The existence of conductivity maxima in pure molten salt was interpreted by Grantham and Yosim to be due to ion association at low densities. Tödheide used a chloride-transfer shifting-equilibrium hypothesis to explain ion association in the case of bismuth trichloride. We have performed density-functional-theory base…
Conversion of basal plane dislocations (BPDs) to threading edge dislocations in 8 and 4{degree sign} offcut SiC material has been studied in order to eliminate the nucleation source of Shockley-type stacking faults in the active region of bipolar devices. Ex situ and in situ growth interrupts were used to convert BPDs…
Abstract Oxidation of organic molecule by metal is very important. Selective oxidants require non aqueous media, which is toxic and hazardous. L-methionine is oxidized to industrially important methyl thiol in micellar media by chromic acid. The overall reaction follows a first order dependency on substrate and hexava…
The phenomenon of laser speckle can be used for detection and visualization of physical or biological activity in various objects (e.g. fruits, seeds, coatings) through statistical description of speckle dynamics. The paper presents the results of non-destructive monitoring of bread cooling by co-occurrence matrix and…
Due to the excitements caused by graphene, other 2D materials have increasingly attracted fundamental research interest as they could open up unprecedented physical properties that cannot be attained in graphene. Here, we present the progress made in properties of 2D oxide nanosheets, highlighting emerging functionali…
We report on first-principles total energy calculations providing the geometric and electronic structures of stable polymerized fullerites consisting of the small fullerene C26. We found that the fused C26 fullerene forms periodic two-dimensional (2D) covalent networks with two different stable structures. Both phases…
Flurbiprofen is a potent non-steroidal anti-inflammatory drug, prescribed commonly for musculoskeletal and joint disorders like arthritis. It is well established that drug degradation during storage and transportation is of particular issue in tropical countries like Pakistan, having areas with temperature variations…
In this study, we investigate the spin susceptibility in the superconducting state of a multilayer system with a layer-dependent Rashba spin-orbit coupling, representing a locally non-centrosymmetric superconductor. We show that the charge imbalance between different layers yields a strong layer dependence on the susc…
This report presents the single crystal X-ray structures of several substituted isoindolines that have been frequently used as starting materials for phthalocyanines, phthalocyanine analogs and related chelates. The structures of 1,3-diiminoisoindoline (1), 1,3-bis(hydroxyimino)isoindoline (2), 1,4-diaminophthalazine…
While dimethyl ether (DME) has been long viewed as a promising alternative fuel for direct fuel cells, DME electrooxidation in general and at PtRu catalysts in particular has remained kinetically handicapped relative to methanol oxidation at PtRu alloys. In this work, a ternary carbon-supported PtRuPd catalyst was dev…
Poly(2,5-benzimidazole) (ABPBI) doped with different acid concentrations were analyzed by means of conductivity and thermogravimetric measurements as well as Raman spectroscopy. The conductivity is measured as a function of temperature and relative humidity. The condensation of the phosphoric acid can be observed in t…
Efficient synthesis of quinoxaline derivatives from the reaction of -diketones and ophenylenediamines in the presence of Keggin-type heteropolyacids (HPA) such as H 3 PMo 12 O 40 , H 4 SiW 12 O 40 , K 7 PMo 2 W 9 O 40 , H 3 PW 12 O 40 .SiO 2 and H 3 PW 12 O 40 in high yields and short reaction times, and at room tempe…
The main challenges for commercialization of fuel cells are cost and durability. Using off-the-shelf materials for system components in Proton Exchange Membrane Fuel Cells (PEMFCs) may lower the cost provided they do not compromise function, fuel cell performance, or life. The purpose of this paper is to increase the…
A series of submicrometer-sized polybutadiene (PB) rubber particles with different diameters ranging from 100 to 450 nm were prepared via an emulsion polymerization. Subsequently, core–shell polybutadiene- graft -polystyrene (PB- g -PS) particles were synthesized using a redox initiator system (cumene hydroperoxide an…
Ammonia electrooxidation on NiPd nanoparticles with 99:1 nominal atomic composition is investigated in NaNO3 at different pH and NH4NO3 concentrations. As-prepared NiPd has very low to no activity towards this reaction, whereas the catalytic activity of NiPd can be significantly improved by building up a layer of Ni(O…
A variety of nanostructured silicide bundles using abundant, non-toxic materials have been prepared. The CrSi2 nanowire, Mg2Si/MgO composite nanowire and Mg2Si nanowire bundles were synthesized using a Si substrate, a SiOx nanofiber bundle, and a Si nanowire array, respectively. The hexagonal MoSi2 nanosheet bundles w…
Lithium insertion materials, such as LiFePO4, have been widely studied as the electrode materials for rechargeable batteries. Alkali ions can be reversibly inserted/extracted into/from their crystal lattices associated with electrochemical redox. In this study, we apply lithium, sodium, and potassium insertion materia…
We successfully synthesized new layered iron oxypnictide Sr2CrO2(FeAs)2 by solid-state-reaction techniques. This is the first report on the Fe-substituted Sr2Mn3As2O2-type oxypnictides to our knowledge. A pellet of stoichiometric mixtures of SrO, Cr and FeAs wrapped with tantalum foil was sintered at 900{\deg}C for 96…
Formation of a ZnO2 layer by H2O2 treatment for single crystal ZnO (0001) substrates was studied. X-ray diffraction (XRD) peaks of ZnO2 with a pyrite structure were observed in XRD 2θ-ω scan patterns of the O-face of single crystal ZnO (0001) substrates with H2O2 treatment, but these peaks were not observed in pattern…