Materials Literature
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We have numerically investigated lasing dynamics from a twist defect in a cholesteric liquid crystal (CLC) by an auxiliary differential equation finite-difference time-domain (ADE-FDTD) method. As ADEs, the equation of motion of polarization described on the basis of the classical electron oscillator (Lorenz) model an…
We show that contact properties of chemical vapor deposition (CVD)-grown graphene to metal electrode can be improved with Ar plasma treatment before metal electrode deposition. The Ar plasma treatment reduced the baseline signal of the Raman spectrum of graphene without changing main peaks of 2D and G peak and increas…
NiFe-seeded magnetic tunnel junctions (MTJs) of IrMn/CoFe/MgO/CoFeB were successfully formed by radically oxidizing a thin Mg layer. Room temperature (RT) tunnel magnetoresistance (TMR) of up to 211±10% was obtained and found to be strongly dependent on the thickness of the NiFe seed layer. High resolution transmissio…
An experimental investigation was carried out to evaluate the effect of using Triacetin (T) as an additive with biodiesel on direct injection diesel engine for performance and combustion characteristics. Normally in the usage of diesel fuel and neat biodiesel, knocking can be detected to some extent. By adding triacet…
Background: With emergence of multidrug-resistant strains of Staphylococcus aureus, there is an urgent need for the development of new antimicrobials which are narrow and pathogen specific. In this context, pyruvate kinase (PK) an important enzyme in the glycolysis, which catalyses the formation of pyruvate which is t…
The study comprised the determination of the effect of application of the rotating sleeve of the barrel with the inner surfaces: geometrically uniform cylindrical as well as containing rectilinear or helical grooves with triangular cross section, on the selected parameters of the extrusion process in the single screw…
50 nm wide n-type silicon nanowires have been manufactured by using a top-down process in order to investigate the thermoelectric properties of silicon nanowire. Nanowire test structures with platinum heaters and temperature sensors were fabricated. The extracted temperature coefficient of resistance (TCR) of the temp…
LiCoO2 is a well established commercial Li-ion battery cathode. However, due to cost constraints and the toxicity of the metal, other layered compounds should be investigated. In this paper, layered LiMn0.3Co0.3Ni0.3Fe0.1O2 were prepared using sol-gel method with CH3COOLi•2H2O, (CH3CO2)2Mn•4H2O, (CH3CO2)2Co•4H2O, (CH3…
A tellurite glass of TeO2-PbO-Li2O doped with Nd2O3 has been successfully fabricated by using the conventional melt-quenched technique. The absorption and emission spectroscopy have been identified using UV-VIS-NIR and photoluminescence spectrometer, respectively. From the spectroscopy, ten significant spectra have be…
In order to consider the effect of micro-structural interactions in the fast transient process of heat transport, a modified bio-heat transfer equation was developed based on the dual-phase-lag model. This work would use the corresponding equation to analyze the thermal response in a perfused tissue subjected to the s…
Some models of the 5/2 fractional quantum Hall state predict that the quasiparticles, which carry the charge, have non-Abelian statistics: exchange of two quasiparticles changes the wave function more dramatically than just the usual change of phase factor. Such non-Abelian statistics would make the system less sensit…
AC-AC conversion is obtained with the help of Cyclo-converters, DC Link converters and AC Voltage Controllers. AC voltage controllers are also referred to as voltage regulators. Main issue concerned to these converters is that they generate harmonics due to periodic variable structure system. The generated harmonics c…
Important aspects of fuel rod behavior, for example pellet-clad mechanical interaction (PCMI), fuel fracture, oxide formation, non-axisymmetric cooling, and response to fuel manufacturing defects, are inherently multidimensional in addition to being complicated multiphysics problems. Many current modeling tools are st…
This paper discusses the processing of a hybrid of TPNR-MWNTs-OMMT nanocomposites with different percentages of filler to determine the optimum mechanical properties of the hybrid nanocomposites. Three types of hybrid nanocomposites with various MWNTs-OMMT compositions (1%wt MWNTs+3%wt OMMT), (2%wt MWNTs+2%wt OMMT) an…
We report a generalized successive failure (or breakdown) methodology for non-Weibull distributions and successfully apply it to both SiO2single-layer dielectric with progressive BD and high-κ/SiO2bilayer dielectrics in intrinsic failure mode. We show that for failure-current based distributions (non-Weibull) of intri…
염화제이철 수용액에 의한 스테인레스 강판의 식각반응에 관한 연구를 수행하였다. 식각액 교반속도, 식각온도, $Fe^{3+}$ 이온 농도, 식각액의 유리산도 및 비중 등 여러 공정변수가 식각속도에 미치는 영향에 대해 조사하였고, 그 결과, AK(aluminum-killed) 철, 크롬(chlomium) 강, 그리고 스테인레스 강(STS430J1L 합금)의 식각반응이 1차 반응식을 잘 따름을 알 수 있었다. 또한 식각액의 피로도(fatigue ratio)가 16% 이하로 유지되면 식각액 내에 슬러지가 발생하지 않으며, 식각된 강판의 표면거칠기 또한 좋아짐을 알 수 있었…
In this work, a novel process for preparing silver pillared interlayer clay (Ag-PILC) has been developed through directly inserting silver nanoparticles into smectite interlayers, which might be a good alternative for the conventional method (polycation exchange) to produce more stable PILCs with higher and more unifo…
The magnetization reversal process in the surface and volume areas of Co-rich glass-covered microwires has been investigated. The study has been performed in the wide series of microwires with chemical composition, geometry (thickness of glass coating) with the purpose of the tailoring of the giant magnetoimpedance ef…
We have used high energy x-ray diffraction microscopy (HEDM) to study annealing behavior in high purity aluminum. In-situ measurements were carried out at Sector 1 of the Advanced Photon Source. The microstructure in a small sub-volume of a 1 mm diameter wire was mapped in the as-received state and after two different…
The various dielectric relaxation processes in NCO-terminated liquid crystalline polyurethane (LCPU) samples have been investigated using the thermally stimulated depolarization current (TSDC) technique. The TSDC results obtained for LCPU samples polarized under different poling conditions show the presence of three p…