Materials Literature
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Abstract Orbital-free density functional theory (OFDFT) is a quantum mechanical method in which the energy of a material depends only on the electron density and ionic positions. We examine some popular algorithms for optimizing the electron density distribution in OFDFT, explaining their suitability, benchmarking the…
Ultracapacitors are creating new horizons in the field of energy storage systems (ESS). The reason behind the popularity is its unmatched characteristics like very high power density, long cycle life, deep discharge capacity, high efficiency and low ESR. Hence these types of devices can be effectively used in pulse po…
Since electric cables play important roles such as power supply and information transmission, their degradation may cause a serious problem. We have been trying to monitor the degradation of cable insulation by measuring the magnitude and phase angle of impedance as a function of frequency in a very wide frequency ran…
Atmospheric icing occurs when surface of exposed structures come into contact with supercooled water droplets and/or snow particles. Ice and wet-snow adhesion and excessive accumulation on exposed structures and equipment is well known as a source of numerous types of failures and malfunctions in power transmission li…
The corrosion inhibition efficiency of Schiff base, on mild steel (MS) in 1.0 M HCl solution have been investigated using weight loss measurements, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization studies. 3FI3ABA exhibited good inhibition on mild steel in HCl medium even at low concentrat…
在锂存在的条件下在正戊醇中回流环化四聚相应的光学活性的前驱体联二萘[2,1-e:1',2'-g][1,4]二羟基-5,6-邻苯二氰, 然后用醋酸酸化处理, 合成了一对对映的四个联二萘酚基团取代的手性自由酞菁四(联二萘[1,2-e:1',2'-g]-1,4-二羟基)[2,3-b;2',3'-k;2'',3''-t;2''',3'''-c']酞菁(1), 并利用一系列的光谱学方法以及元素分析表征了这种新型的手性酞菁化合物. 单晶X衍射分析确定了两种对映体的绝对构型, 从而阐明了自由酞菁(1)的手性分配.
Bacterial cellulose is one of biopolymers that are an interesting alternative material to use for reinforcement in bio-based composites as green products. Here we reported the production of bacterial cellulose using Acetobacter xylinum strain TISTR 975. The results revealed that carbon source and nitrogen source could…
This article deals the fabrics of different blend proportions ie. polyester/cotton were prepared with different woven structures like plain, twill, satin. These fabrics were treated with fabric softener like silicone. After all the above trials the seam strength and seam slippage were studied for both finished and unf…
Phenolic compounds have become a cause for of worldwide concern due to their persistence, toxicity and health risks. Hence, removal of these pollutants from aqueous effluents is an important practical problem. Ultrasonic technology may be used for water and wastewater treatment as an advanced oxidation process. Applic…
The phenomena connected with wear and friction processes are the most often the reason of machine parts damage. Therefore, the possibilities of the exposed machine parts life increase are searched for. One of them is the use of special wear resistant overlays on the functional machine parts surfaces. But the producers…
Now a day there is an emerging interest in replacing non-renewable additives with biodegradable compounds. Cellulose plays very important role in this modification. Their low cost and low density associated with high specific mechanical properties represent a good renewable and biodegradable alternative to the most co…
The first part of this communication studies the electrochemical properties of thin films of poly(3,4-ethylenedioxythiophene) (PEDOT) grown on the three basal plane platinum electrodes via cyclic voltammetry, chronoamperometry, electrochemical impedance spectroscopy and in situ FTIR spectroelectrochemistry. In the sec…
The formation behavior of textures during high temperature plane strain compression deformation is experimentally studied on AZ80 magnesium alloy. Three kinds of specimens with different initial textures are prepared from the extruded bars having a <10\bar{1}0> fiber texture. Plane strain compression is conducted at 7…
Transparent conducting thin films of aluminum-doped zinc oxide (ZnO:Al) have been deposited on SnO2:F/glass by the chemical spray technique, starting from zinc acetate (CH3CO2)2Zn.2H2O and aluminum chloride AlCl3. The effect of changing the aluminum-to-zinc ratio y from 0 to 3 at.%, has been thoroughly investigated. I…
Small clusters of nanoparticles are ideal substrates for SERS measurements, but the SERS signal enhancement by a particular cluster is strongly dependent on its structural characteristics and the measurement conditions. Two methods for high-throughput assembly of silver nanocubes into small clusters at predetermined l…
Double-layered NiPt nanobowls with diameter of ∼200 nm and layer thickness of ∼3 nm have been synthesized through a “one-pot” route in water at room temperature without pre-made templates. The nanobowls are self-assembled with asymmetric double layers and exhibit alignment behavior with different orientation on silico…
The oxide-ion current across grain boundaries in a polycrystalline LaGaO(3) ceramic doped with 1 mol% Sr(2+) increases non-linearly with the applied dc-bias to present a transition from ohmic to superohmic where the bias exceeds the thermal voltage, verifying that a Schottky-type potential barrier exists at the grain…
The terpolymer resins have been prepared by polycondensation of vanillin (V) and chloro/bromo-substituted acetophenone (CA/BA) with furfural (FU) in the presence of 1 M HCl in 1:1:2 molar proportions. The characterization and structural elucidation of terpolymers were confirmed by FT-IR, pyrolysis GC-MS, and non-aqueo…
Single phase Ca 3 Sc 2 Si 3 O 12 co-doped with Pr 3+ and Mg 2+ was synthesized by high temperature solid state reaction. The optical spectroscopy of this composition was investigated using time-resolved VUV spectroscopy upon excitation with synchrotron radiation. It was demonstrated that the addition of Mg 2+ leads to…
India is one of the few countries committed to expansion of nuclear power. In view of the abundance of thorium relative to uranium, thorium cycle is under serious development and implementation. Both ThO2 and (U,Th)O2 are used. Fine powders of the same are mostly prepared through the aqueous chemical route, pressed an…