Materials Literature
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The corrosion of pure copper in sulfide-containing aqueous solutions that are typical of crystalline rock repositories in Sweden and Finland for the isolation of High Level Nuclear Waste has been studied using potentiostatic and potentiodynamic polarization, Mott-Schottky analysis, and electrochemical impedance spectr…
We have studied the structural and electronic properties of Ce2Ti2O7 (CeTO) and Pr2Ti2O7 (PrTO) by first-principles density functional theory calculations. The computed structural parameters are in fairly good agreement with the available experimental findings. Band structure calculations using the GGA+U approach pred…
High thermal conductivity, electrical insulating polymer composite has a wide range of applications in electronic packaging. We report the magnetic alignment of hexagonal boron nitride (hBN) in epoxy composite and the greatly enhanced thermal conductivities of the composites. Superparamagnetic iron oxide nanoparticles…
Empty fruit bunch oil palm (EFBOP) fibres were surface modified by four different methods, propionylation, vinyltrimethoxy silanization, PPgMA dissolution modification, and PPgMA blending, and integrated into a polypropylene (PP) matrix. The designed biocomposites were subjected to an absorption process at different t…
BACKGROUND: Comparison of short peptides which form amyloid-fibrils with their homologues that may form amorphous β-aggregates but not fibrils, can aid development of novel amyloid-containing nanomaterials with well defined morphologies and characteristics. The knowledge gained from the comparative analysis could also…
The phase transitions in smectogenic liquid crystal BBBA (4-butoxybenzylidene-4′-butylaniline) doped by multi-walled carbon nanotubes (NTs) were studied by methods of optical transmission, differential scanning calorimetry (DSC), measurement of electrical conductivity and analysis of microscopic images. The concentrat…
Here we report the dielectric response and electric conduction behavior of magnetoelectric gallium ferrite single crystals studied using impedance analysis in time and temperature domain. The material exhibits two distinct relaxation processes: a high frequency bulk response and a low frequency interfacial boundary la…
Trilayer graphene in both ABA (Bernal) and ABC (rhombohedral) stacking sequences is shown to exhibit intense infrared absorption from in-plane optical phonons. The phonon feature, lying at ~1580 cm(-1), changes strongly with electrostatic gating. For ABC-stacked graphene trilayers, we observed a large enhancement in p…
Nanocomposite BaFe 12 O 19 /α-Fe microfibers with diameters of about 1–5 μm are prepared by the organic gel-thermal selective reduction process. The binary phase of BaFe 12 O 19 and α-Fe is formed after reduction of the precursor BaFe 12 O 19 /α-Fe 2 O 3 microfibers at 350 °C for 1 h. These nanocomposite microfibers a…
In this work, we have studied electric field-induced magnetization effect of multiferroic BiFeO3 (BFO) nanowires in situ using magnetic force microscopy (MFM). Changes in magnetic domain contrast have been observed in the MFM phase images under applied electric potential, which indicate local magnetoelectric (ME) coup…
The Corrosion inhibition effect of organic oil of leaves of Lanvandula stoekas [L] on corrosion of alloy UB6 stainless steel in 5.5 M H3PO4 solution was carried out using electrochemical polarisation and EIS methods. Experiments are performed by varying concentration of the inhibitor and temperature. The inhibition ef…
The work represents an advance in understanding spider silks related to supercontraction which is clearly the water triggered shape recovery phenomenon. A structural model of spider silks is established, which can integrate a number of phenomena such as tunable mechanical properties, the origin, functions and ground s…
A simple method for the synthesis of magnetic hollow silica microspheres is reported. Magnetic hollow silica was obtained after pretreating via precipitation method of the dextran template microspheres with magnetite. Silica shell was obtained from Na2SiO3. After thermal decomposition of the dextran template, the magn…
Fragilaria pinnata Ehrenberg is one of the most commonly reported taxa in floristic and ecological works from around the world. Yet, the images published for this taxon reveal that its identity is not well defined and that several morphological variants have been ascribed to it. The present manuscript includes a preli…
Local electrical conduction behaviors of polycrystalline La-doped BiFeO3 thin films have been investigated by combining conductive atomic force microscopy and piezoelectric force microscopy. Nanoscale current measurements were performed as a function of bias voltage for different crystal grains. Completely distinct co…
We report on the occurrence of exothermic phenomena during the thermal ramping of mesoporous silicon powders in ambient air. For furnace set temperatures of up to 800 °C, discrete exotherms occur during the initial ramp-up stage from room temperature. With an onset around 200 °C, the powder temperature rapidly self-el…
Metals in the form of nanoparticles are one of the long-term challenges for the creation of a new class of antibacterial agents. The biological activity of nanoparticles of metals depends directly on their physical and chemical properties. The objective of this work is to study the physicochemical parameters and antib…
The structural, energetic and electronic properties of periodic graphene nanobud (PGNB) with small-diameter fullerenes (C20, C34, C42, and C60) adsorbed have been investigated by first-principles plane wave method. The bond-to-ring cycloaddition is found to be energetically most stable among various configurations and…
The differentiation of the vector hysteretic function represented by a vector play model is discussed for efficient nonlinear electromagnetic field computation using the Newton-Raphson method. The combination of the nonlinear finite-element method and the vector play model achieves accurate representation of the AC an…
The corrosion process of general corrosion, passivation, intergranular corrosion, pitting corrosion and crack propagation during stress corrosion cracking of 304 austenitic stainless steels were investigated by electrochemical noise technique. The wavelet based fractal dimension D was calculated by using discrete wave…