Materials Literature
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In this research, synthesis and characterization of the nano-graphene oxide (GO) based on the modified polyacrylic acid (PAA) have been carried out. Formation of esteric bonds between the carboxyl functional groups of the GO surface and the hydroxyl groups of PAA was confirmed by FTIR spectroscopy. The result of this…
This paper presents a time–frequency analysis of the vibration of transformer under direct current (DC) bias through Hilbert–Huang transform (HHT). First, the theory of DC bias for the transformer was analyzed. Next, the empirical mode decomposition (EMD) process, which is the key in HHT, was introduced. The results o…
To improve the dispersion ability of CuO nanoparticles (NPs), their surface was modified by chiral diacids (DAs) containing amino acids. The surface modification process was achieved using ultrasonic irradiation. DA could be absorbed on the surface of CuO. The carboxyl groups of DA may interact with surface of CuO NPs…
Shape memory materials (SMMs) are materials that can return to their virgin state and release mechanically induced strains by external stimuli. Shape memory polymers (SMPs) are a class of SMMs that show a high shape recoverability and which have attractive potential for structural applications. In this paper, we exper…
A persistent problem of surface mounted permanent magnet (SMPM) motors is the non-uniformity of the developed torque. Either the motor design or the motor control needs to be improved in order to minimize the periodic disturbances. This paper proposes a new control technique for reducing periodic disturbances in perma…
AIM: The aim of the study described in the present paper was to assess several in vitro effects of TiO2 nanoparticles with different colloidal and photocatalytic properties on RAW 264.7 macrophages.METHODS: The cells were exposed to Degussa P25 titania and two other types of nanoparticles synthesized by a hydrothermal…
Shape memory alloys (SMAs), due to their ability to repeatedly recover substantial deformations under applied mechanical loading, have the potential to impact the aerospace, automotive, biomedical, and energy industries as weight and volume saving replacements for conventional actuators. While numerous applications of…
However, studies on the effect of nano-reinforcements in repeated impact scenarios are relatively limited. This work investigates the effect of resin nanoclay modification on the impact resistance of glass-fiber reinforced polymer (GFRP) composites subjected to repeated impacts. Three impact energy levels were used in…
This paper presents an innovative low-cost electrodeposition process to grow metallic zinc grids as a front contact for Cu(In,Ga)(Se,S)2 (CIGS) and silicon heterojunction solar cells as an alternative to complex and expensive monolithic integration and silver screen printing techniques respectively. Morphological and…
We report the fabrication of a Si(111) crystalline thin film on graphene by the aluminum-induced crystallization (AIC) process. The AIC process of Si(111) on graphene is shown to be enhanced compared to that on an amorphous SiO2 substrate, resulting in a more homogeneous Si(111) thin film structure as revealed by X-ra…
This research aimed to study the effect of cotton stickiness in quality of ring-spun yarn, the effect of blending sticky with nonsticky cotton, and optimize the spinning process based on Taguchi experiment design technique. Nine experiments were performed with respect to the L9 orthogonal design. Taguchi method was ut…
The chemical fate of radical intermediates is relevant to understand the biological effects of radiation and to explain formation of DNA lesions. A direct approach to selectively generate the putative reactive intermediates is based on the irradiation of photolabile precursors. But, to date, radical formation and reac…
Abstract Because of increased activity in deepwater and high-pressure/high-temperature (HP/HT) environments, the safe operation of corrosion resistant alloys (CRAs) of different types is important. Reservoirs can be subjected to different flow impairment mechanisms that can require the use of acidizing fluids. Titaniu…
Abstract One of the issues in bulk c-GaN growth is the decrease in the diameter of crystals with an increase in thickness owing to the appearance of inclined and facets. In this study, we performed −c-GaN growth by oxide vapor phase epitaxy (OVPE). As a result, truncated-inverted-pyramidal crystals were successfully g…
The cement production facing the current environmental issue like CO2 emission and scarcity of raw materials, burning of higher amount fossil fuel for production and rapidly increasing demand for cement and concrete can be of a greater problem in the near future. On the other hand there is an ongoing issue of biomass…
Two new mononuclear iron (II) coordination complexes: Fe(L1)2(SCN)2 (1, L1:5-dimethylether-4-(4-methylphenyl)-3-(2-pyridinyl)-1,2,4-triazole) and Fe(L2)3(ClO4)2 (2, L2 :1-ethyl acetate-2-(2-pyridinyl)-imidazole), for the exploration of spin-crossover compounds have been synthesized and characterized. Structural analys…
Scrapie is a neurodegenerative prion disease of sheep, goats and mouflons, belonging to the group of transmissible spongiform encephalopathies (TSEs), which affects humans as well. Even though classical scrapie has been known for over 250 years, the 1985 BSE crisis related to the advent of new forms of the Creutzfeldt…
The Modified Foamed Concrete (FC) was acheived by replacing sand with Rice Husk Ash (RHA) and experimental result has shown an increased in the compressive strength compared to conventional FC. This increase in compressive strength is required by FC to withstand impact loading. The experimental parameters from the mod…
A new Zn(II) coordination polymer, namely [Zn3(TTHA)(bpp)(H2O)3]n·4n(H2O) (1 H6TTHA = 1,3,5-triazine-2,4,6-triamine hexaacetic acid, bpp = 1,3-di(4-pyridyl)propane), has been synthesized by the hydrothermal self-assembly of Zn(NO3)2·6H2O, H6TTHA and bpp. Single-crystal x-ray diffraction analysis reveals that compound…
Measuring the state of polarization (SoP) of light beams is of paramount importance in many scientific and technological disciplines, including chemistry, biosensing, astronomy and optical communications. Commercial polarimeters are built by using bulky and expensive optical elements, including half-wave plates or gri…