Materials Literature
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Author's recent work has been focused on exploring possibilities for measuring partial discharges (PDs) under the action of pulse width modulated waveforms (PWM), which resulted in a development of an electrical measurement method adopted for such voltages. This solution allows a more flexible PD analysis since voltag…
Based on the ABAQUS/Explicit code, A 3D elastic–plastic and coupled thermo-mechanical FE model of radial ring rolling of AZ31 Magnesium alloy has been proposed to analyze the influence of rotational speed of driver roll to study the inhomogeneity distribution of strain and temperature, fishtail coefficient, rolling fo…
A potential ion-exchange material was developed from poly(acrylonitrile) fibers that were prepared by electrospinning followed by alkaline hydrolysis (to convert the nitrile group to the carboxylate functional group). Characterization studies performed on this material using X-ray photoelectron spectroscopy, scanning…
In our previous paper we showed that the MMP-9 enzyme recognizes a specific peptide sequence, Lys-Gly- Pro-Arg-Ser-Leu-Ser-Gly-Lys, and cleaves the peptide into two parts [1]. In this study, the peptide is labeled with two dyes, carboxyfluorescein (5-FAM) and Cy5. A highly efficient energy transfer of over 80% results…
Oxidative polymerization of p -phenylenediamine in a hydrochloric acid solution yields not a polyquinoxaline polymer as described in the literature but a modified poly(1,4-benzoquinonediimine- N,N ′-diyl-1,4-phenylene) analogous to polyaniline known as pernigraniline. A new scheme of oxidative polymerization of p -phe…
The internal photoluminescent quantum yield (iPLQY)--defined as the ratio of emitted photons to those absorbed--is an important parameter in the evaluation and application of luminescent materials. The iPLQY is rarely reported due to the complexities in the calibration of such a measurement. Herein, an experimental me…
The study of the optical properties of zinc oxide (ZnO) nanorods and its composite nanostructures is an appealing issue in order to have highly efficient optoelectronic devices in the future. Zinc oxide, copper oxide (CuO) and their composite nanostructures were grown by the hydrothermal growth technique. The structur…
Supercapacitors are energy storage systems appreciated as high power short duration power sources. As any electrochemical devices, supercapacitors are subject to ageing processes. Ageing is characterized by supercapacitors electrical performances loss (capacitance fades and Equivalent Series Resistance increases). In…
Long-rod penetration in a wide range of velocity means that the initial impact velocity varies in a range from tens of meters per second to several kilometers per second. The long rods maintain rigid state when the impact velocity is low, the nose of rod deforms and even is blunted when the velocity gets higher, and t…
Halloysite Clay nanotubes (HNTs) are naturally occurring nanotubes composed of double layered aluminosilicate minerals with a hollow tubular structure in the nanometer range. In recent years, HNTs have attracted specific research attention as a possible new material for various biological applications, including drug…
Serat alam pada umumnya memiliki kemampuan menyerap suara untuk mengendalikan kebisingan. Untuk mengurangi kebisingan khususnya terhadap bunyi mesin tekstil, maka dalam penelitian ini dibuat komposit peredam suara berpenguat serat rami, kelapa dan abaka. Komposit terdiri dari lembaran non woven needle punch yang dipro…
Fluorescent nanodiamonds (FNDs) are one of the new and very promising biocompatible nanomaterials that can be used both as a fluorescence imaging agent and a highly versatile platform for controlled functionalization to target and deliver a wide spectrum of therapeutic agents. Among the remarkable fluorescence propert…
ZnO thin films were deposited by reactive cathodic radio-frequency (RF) sputtering from a pure Zn target in a gas mixture of 30% O2 and 70% Ar and at different RF powers. The structural properties of the as-deposited thin films were studied by X-ray diffraction (XRD). The optical properties (especially the refractive…
Investigations of dielectric properties of a newly developed enamel wire insulation created by adding chromium (III) oxide (Cr2O3) filler to polyamide-imide enamel base are presented. Results of measurements of electrical conductivity and complex permittivity at various temperatures as well as surface potential decay…
Abstract Magnetic properties and magnetocaloric effects (MCEs) of the PrSi compound were studied. The PrSi compound undergoes a second‐order ferromagnetic‐to‐paramagnetic transition at the Curie temperature of T C = 52 K. Large MCE with no magnetic hysteresis loss is observed around T C . The maximum values of magneti…
Experiments were carried out studying the catalytic behavior of CaO on the thermal decomposition of N2O. CaO was found to catalyze N2O decomposition and the decomposition ratio was sensitive to reaction temperature. The catalytic mechanism was further explained by Density Functional Theory with generalized gradient ap…
This paper focuses on the effect of trap parameters on dc breakdown properties of LDPE/Al2O3nanocomposites. The thermally stimulated discharge current (TSDC) measurement was conducted to characterize the trap parameters of specimens, including trap level and trap density. The experimental results indicated that incorp…
The inhibitive action of extract of Phyllanthus fraternus leaves as corrosion inhibitor for mild steel in H2SO4 solutions was investigated using conventional weight loss, gasometric techniques, electrochemical polarizations and electrochemical impedance spectroscopy. The results showed that the extract of Phyllanthus…
Hysteresis is a phenomenon that has been observed across many different materials and situations. Under small-amplitude cyclical motion, classical hysteresis designates a constant loss per cycle over a wide range of frequencies. This is also consistent with an increase in losses or attenuation with frequency that is s…
The objective of the research study presented in this paper is to verify the applicability of C60fullerenes as inhibitors of aging processes in liquid dielectrics. For this purpose, a set of fullerene doped oil samples were prepared and then these samples were oxidized. Such prepared set of samples was examined for ba…