Materials Literature
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We present a calculation of electron-impurity scattering rate as a function of quasi particle energy(ϵ) for doped bilayer graphene (BLG) at zero temperature. The computed scattering rate of BLG first declines with ϵ and then increases after reaching to a dip at around Fermi energy (ϵf). It is also found that scatterin…
Fracture toughness properties of melt growth GdBa2Cu3Ox (Gd123) large single domain superconducting bulks with Ag2O of 10 wt% and Pt of 0.5 wt%; 45 mm in diameter and 25 mm in thickness with low void density were evaluated at 77 K through flexural tests of specimens cut from the bulks, and compared to those of a conve…
Three different carbon nanotube (CNT)-SiO2 hybrid materials were prepared by a simple sol-gel process using benzyl alcohol as a surfactant, and the variation of morphology of the CNT-SiO2 hybrid materials was investigated. The results showed that the morphology was influenced by the diameter of the different CNTs, and…
Shape memory finishing is suitable to wool knitted and woven fabric. The chemical is water soluble and environment friendly. The shape memory treated wool knitted fabric and garments achieve good dimensional stability, pill resistance, pattern design, crease retention, wrinkle recovery and bagging recovery effects. Th…
Radiation safety is reviewed for electron accelerators, mainly synchrotron radiation facilities. Accelerator radiation safety systems consist on safety interlock system, radiation shielding and radiation monitoring. These systems depend strongly on the characteristics of machines such as the maximum electron energy. I…
Porosities of set and burnout compacts of phosphate-bonded investments were determined. A gas pycnometer was used to measure the volumes, and hence the densities, of fine powders and porous compacts. Porosities of set and burnout compacts were then obtained from these data for as-received powders and dry set compacts…
We use the combined conformational and vibrational analysis methodology to predict in what conformation different crown ethers and some of their complexes exist. Comparison between the structure of some of the low and high energy conformations allows the prediction of the factors that affects the conformational stabil…
In this paper, the vibrational properties of four- and five-layered graphene sheets (GSs) embedded in the elastic matrix are analyzed based on a multi-layered continuum model with considering the vdW interaction of any two layers of GSs. The influences of vdW interaction and the surrounding matrix on the vibrational p…
We characterize left-handed (LH) traveling-wave fleld efiect transistors (TWFETs), which consist of two composite right- and left-handed (CRLH) transmission lines that are electromagnetically coupled by capacitances, inductances, and FET transconductances, for obtaining loss-free LH waves. In a device, two difierent p…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Pravuram Panda, S. K. Singh, S. P. Sinha; Synthesis of γ-aluminium oxynitride spinel using therma…
The effect of particle morphology on the sinterability of microwave‐sintered SiC‐ZrO 2 was evaluated in this paper. A comparison was also made against the electric furnace and resulted in faster heating rate because of the difference of heat transfer in the sintering processes. High‐energy mechanical milling process h…
Age-hardenable Al–Mg–Si alloys containing an additional element of either Ag, Cu, Pt or Pd were processed by high-pressure torsion (HPT) and they were subsequently aged at a temperature of 373K for up to a total period of 5400 ks. It was found that, in all alloys, the grain sizes after HPT were refined to 300–400 nm a…
Bismuth ferrite-lead titanate (BFPT) single crystals were grown using a PbO:Bi2O3 flux. Highly pure, crack free single crystals of 4 mm diameter were produced. Energy dispersive X-ray analysis (EDX) and Electron Probe Micro-Analysis (EPMA) were used to determine the chemical composition of the crystals, and scanning e…
采用高温熔融法制备了组分为TeO2-ZnO-Na2O的Tm3+离子单掺和Tm3+/Yb3+共掺碲酸盐玻璃,应用Judd-Ofelt理论计算分析了玻璃样品的强度参量Ωt(t=2,4,6),自发辐射跃迁几率A,荧光分支比β和荧光辐射寿命τrad等光谱参量,测量得到了不同Yb3+离子掺杂浓度下玻璃样品的Tm3+离子上转换发光谱.结果显示,在980nm泵浦光激励下玻璃样品发射出强烈的近红外上转换荧光.对Tm3+离子上转换发光分析表明,强烈的Tm3+离子近红外上转换发光主要来自于Yb3+/Yb3+离子间的共振能量传递以及基于单声子和双声子辅助的Yb3+/Tm3+离子间的非共振能量传递过程,并进一步计算得到了声子贡献比和能量传递系数.最后,计…
Zinc tris Thiourea Sulphate (ZTS) is a semi organic non-linear optical crystal. The ZTS and phosphate mixed (in different mol %) ZTS crystals have been grown from aqueous solution using the slow evaporation method. Single crystal XRD were carried out for ZTS and phosphate mixed ZTS crystals to determine cell parameter…
Blending of polymer with organic/inorganic material has given a new direction for developing novel materials. This is an easy and inexpensive method of modifying various properties of the individual materials and composites. The aim of the present work is an attempt to incorporate crystals in polymer host and investig…
Besides plasma-based processes, photo-initiated surface modifications have an interesting potential for adhesion promotion. This is of special interest with applications ranging from classical finishing to composites. Photo-chemical processes using continuous UV sources — monochromatic as well as broad band — are base…
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A compact first-negative-order resonance-based small loop antenna is proposed which consists of two unit cells of composite right-left hand transmission line (CRLH TL). By folding one of the unit cells to the bottom layer, higher radiation efficiency and omnidirectional radiation property can be achieved. A prototype…
Badania realizowane w ramach projektu nr WND-POIG. 01.03.01-12-004/09 w Programie Operacyjnym Innowacyjna Gospodarka (POIG). Projekt wspolfinansowany przez Unie Europejską ze środkow Europejskiego Funduszu Rozwoju Regionalnego.