Materials Literature
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Porous silicon films with porosity ranging from 42% to 77% were fabricated by electrochemical anodization under different current density. We used atomic force microscopy and dynamic scaling theory for deriving the surface roughness profile and processing the topography of the porous silicon layers, respectively. We f…
The microwave coupling efficiency of the 2.45 GHz, microwave plasma assisted diamond synthesis process is investigated by experimentally measuring the performance of a specific single mode excited, internally tuned microwave plasma reactor. Plasma reactor coupling efficiencies (η) > 90% are achieved over the entire 10…
In the incubation period of ultrasonic cavitation, due to the impact of microjets on the material surface, the needle-like microjet-pits are formed. Because the formation of microjet-pits relates with the evolution of cavitation erosion on engineering materials, corresponding study will promote the understanding on th…
Objective(s): The development of reliable and ecofriendly process for the synthesis of nano-metals is an important aspect in the field of nanotechnology. Nano-metals are a special group of materials with broad area of applications. Materials and Methods: In this study, extracellular synthesis of silver nanoparticles (…
We present the results of extended theoretical LDA+DMFT calculations for a new iron-pnictide high temperature superconductor NaFeAs compared with the recent high quality angle-resolved photoemission (ARPES) experiments on this system (see arXiv:1409.1537). The universal manifestation of correlation effects in iron-pni…
The Chilopoda is found in a broad array of terrestrial habitats from tropical rain forests to deserts and there are more than 8000 species worldwide. Chitin and chitosan were obtained from Scolopendra cingulata for the first time in this study and physico-chemically characterized. The dry weight chitin content of S. c…
Germanene, an allotrope of germanium which is a two dimensional material with sp 2 hybridization, has almost the same properties with graphene except for its buckled structure. In this study, germanium nanoribbon (GeNR) is use for it is still a new material for nanoscale level of research. In this paper, we investigat…
In this study, the corrosion resistance of selected aluminum alloys with various combinations of commercial coatings was investigated using the Tafel electrochemical method in water and simulated salt water environments. The microtopography of the surfaces of the metals and applied coatings was tested using atomic for…
Abstract. We study the cohomology and hence K-theory of the ape-riodic tilings formed by the so called ‘cut and project ’ method, i.e., patterns in d dimensional Euclidean space which arise as sections of higher dimensional, periodic structures. They form one of the key fam-ilies of patterns used in quasicrystal physi…
In wet conditions, corona discharges may occur on composite insulator surfaces of well-designed power transmission equipment. Corona exposure gradually reduces the surface hydrophobicity and degrades the polymer surface. Recently, much attention has been paid on improvement of corona surface resistance by dispersing n…
A special design of an oxide-based transversal thermoelectric device utilizing thermoelectric oxides in combination with a ceramic multilayer technology is proposed. Metal strips within the ceramic matrix replace the tilted stack of alternating layers used in artificial anisotropic transversal thermoelectric devices.…
This manuscript presents a study of the upconversion (UC) in barium yttrium fluoride (BaY2F8) single crystal doped with trivalent erbium ions (Er3+) under excitation of the 4I(13/2) level at three different wavelengths: 1493 nm, 1524 nm and 1556 nm. The resulting UC emission at around 980 nm has been investigated and…
The biocidal activity of carbonic-acid corrosion inhibitors (CIs) based on fatty acids from different vegetable oils against bacterial cells that catalyze biocorrosion processes was investigated using the bioluminescent method for determining the intracellular ATP concentration. It was shown that all obtained CIs exhi…
Structures, stabilities, electronic properties and carrier mobilities of 6,6,12-graphyne nanoribbons (GyNRs) with armchair and zigzag edges are investigated using the self-consistent field crystal orbital method based on density functional theory. It is found that the 1D GyNRs are more stable than the 2D 6,6,12-graphy…
In low energy scanning electron microscope (SEM) with primary electron energy less than 1.0 keV, the dependence of SEM contrast on crystallographic orientation within a range of 1.0 nm in depth has been investigated by utilizing 4H-SiC (0001) as a standard sample having a definitive electron penetration depth marker l…
Abstract Thermotropic hydrogen-bonded ferroelectric binary liquid crystal mixtures comprising of N -carbamyl- l -glutamic acid (CGA) and p-n-alkyloxy benzoic acids (BAO) are investigated. Variation in the molar proportion of X and Y (where X=CGA+5BAO and Y=CGA+9BAO, CGA+10BAO, CGA+11BAO, and CGA+12BAO) comprising of f…
Insulator is one of the most commonly used devices in transmission lines, so that the reliability of insulators is of great importance to the stable and safe operation of the electric grid. This paper analyzed the filthy discharge of polluted insulators based on ultraviolet (UV) imaging detection technology. By establ…
This study deals with the photodegradation of polyethylene films for greenhouse covering. The UV range of solar light appears as the most deleterious factor of plastic degradation in outdoor exposure. The reasons of this photosensitivity are structural defects which are light absorbing. The use of FTIR as an investiga…
The article addresses the possibility of alloy elements in MnBi which may modify the thermodynamic stability of the NiAs-type structure without significantly degrading the magnetic properties. The addition of small amounts of Rh and Mn provides an improvement in the thermal stability with some degradation of the magne…
Abstract Two electronic push–pull fluorophores consisting of a benzothiadiazole core and a terminal N,N -dimethylamino electron donating group were prepared. The effect of the terminal electron withdrawing group (–NO 2 and –CN) on the spectroscopic, electrochemical, and spectroelectrochemical properties were examined.…