Materials Literature
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Piezoelectric actuators are often modeled as a lumped mass system in the mechanical domain and as a capacitive element in the electrical domain. Based on a real-time capacitance measurement, it is observed that the piezoelectric capacitance is a function of voltage. This leads to a modification of the traditional piez…
The wave propagation characteristics of an acoustic metamaterial composed of periodically repeated one-dimensional Helmholtz resonator array was investigated considering the effects of dimensional changes of the resonator geometry on the transmission coefficient and band gap. The effective impedance and transmission c…
An efficient synthesis of quinoxalines derivatives is described using magnetic material separated from coal fly ash. Coal fly ash is a waste material generated in huge amount by burning of coal for the generation of electricity in thermal power station. It contains $SiO_2$ , $Al_2O_3$ and magnetic material in signific…
By using ionic liquid 1-hexylpyridinium hexafluorophosphate ( $HPPF_6$ ) based carbon ionic liquid electrode (CILE) as the substrate electrode, a $CoMoO_4$ nanorods and myoglobin (Mb) composite was casted on the surface of CILE with chitosan (CTS) as the film forming material to obtain the modified electrode (CTS/ $Co…
When atomic layer deposition (ALD) is performed on a porous material by using an organometallic precursor, minimum exposure time of the precursor for complete coverage becomes much longer since the ALD is limited by Knudsen diffusion in the pores. In the previous report by Min et al. (Ref. 23), shrinking core model (S…
In this work we report on the preparation, characterization, and properties of a thermally treated lignin-derived, phenolic-rich fraction (PRF) of wood pyrolysis bio-oil obtained by ethyl acetate extraction. The PRF was characterized for viscoelastic and rheological behavior using dynamic mechanical analysis (DMA) and…
A rhodamine B-based fluorescent probe for nitrite ion ( $NO{_2}^-$ ) has been designed, synthesized, characterized and its properties for recognition of $NO{_2}^-$ were studied. Nearly non fluorescent probe upon reaction with nitrite ion significantly triggered the fluorescence. Fluorescence response is based on ring…
We fabricated InAlN/AlGaN/GaN heterostructures using a regrowth technique in order to avoid an unintentional Ga incorporation into the InAlN barrier layer. We prepared two types of samples (S1 and S2) using different regrowth sequences: InAlN regrowth on AlGaN/GaN (S1), and InAlN/AlGaN/GaN regrowth on GaN (S2). The ch…
Sintering of metal particles at high temperature in thermochemical looping processes, such as the iron-based looping process, dramatically reduces their reactivity. During the sintering process, metal particles lose their chemically active surface area, typically within only a few oxidation and reduction cycles. To co…
The actinobacterium Rhodococcus opacus 1CP possesses a so far unique variant of the modified 3-oxoadipate pathway for 3-chlorocatechol degradation. One important feature is the novel dehalogenase ClcF, which converts (4R,5S)-5-chloromuconolactone to E-dienelactone. ClcF is related to muconolactone isomerase (MLI, EC 5…
The thickness dependence of the static and dynamic properties of Co2MnSi (CMS) full Heusler was investigated. Five samples with thickness ranging from 7 to 100 nm were deposited by rf magnetron sputtering on single crystal MgO(001). X-ray diffraction and transmission electron microscopy (TEM) evidence the epitaxial gr…
This article analyses the experimental and numerical tests of cylindrical and conical absorbers with longitudinal reinforcements under impact loading. Specimens were put under free fall loading by Drop Hammer and their energy absorption, initial peak force, average force, and crush length were calculated. Then, the ob…
A SiC–Si sludge composed of 79.4 wt % SiC, 14.2 wt % Si, and 5.06 wt % Fe was chlorinated in a tubular reactor with nitrogen as the carrier gas. The chlorination temperature was varied from 100 °C to 1200 °C, the time was varied from 1 h to 8 h, and the chlorine mole fraction was varied from 2.5% to 10.0%, while the f…
Whether or not nanoscale HfO2 has ferromagnetism is a debatable issue. In this study, monoclinic HfO2 nanorods with an average size of about 33.7 ± 3.1 nm in length and 8.9 ± 0.7 nm in width were synthesized via a chemical solution method. In comparison with many HfO2 nanoparticles/nanoclusters synthesized by physical…
The present state of technology for obtaining hydrogen by biological methods and for purifying it is reviewed from the viewpoint of its possible use in kilowatt-class power installations. Hybrid membranesorption biohydrogen purification methods combining membrane-based pretreatment and sorption-based final treatment,…
The interaction of titanium (IV), yttrium (III), zirconium (IV), palladium (II) and cerium (IV) with deprotonated enrofloxacin leads to the formation of the neutral or cationic mononuclear complexes. The isolated solid complexes have been characterized with physicochemical and spectroscopic techniques and thermogravim…
To study the effects of Dy2O3 nanoparticle addition to BSCCO superconducting system, four bulk polycrystalline samples with general formula of Bi1.6Pb0.4Sr2Ca2Cu3Oy + xDy2O3 (where, x = 0.0, 0.5, 1.0, 2.0 wt%) were prepared by chemical sol-gel method. Dy2O3 nanoparticles were added to the BSCCO system in order to impr…
Bilayer membranes self-assembled from simple amphiphiles in solution always have a planar ground-state shape. This is a consequence of several internal relaxation mechanisms of the membrane and prevents the straightforward control of vesicle size. Here, we show that this principle can be circumvented and that direct s…
A fluctuation relation for aging systems is introduced and verified by extensive numerical simulations. It is based on the hypothesis of partial equilibration over phase-space regions in a scenario of entropy-driven relaxation. The relation provides a simple alternative method, amenable of experimental implementation,…
A Young's-type double-slit experiment using electron beams carrying orbital angular momentum (OAM) is demonstrated in a transmission electron microscope. Each of the slits is replaced by a grating mask with a fork dislocation, which generates electron beams with OAM as diffracted beams. Interference fringes produced b…