Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The time evolution of current and voltage in Ovonic-switching devices is affected, on one side, by parasitic elements due to contacts and connectors and, on the other one, by the internal-relaxation mechanisms of the material itself. The two aspects, respectively termed here “extrinsic” and “intrinsic” dynamics, are i…
We present diffraction efficiencies of hollow silica nanospheres coated layer by calculation using a rigorous coupled wave analysis (RCWA) method. The results show the effect of inner ratios, diameters on the diffraction efficiency. We also compare reflection / transmission characteristics with conventional antireflec…
We propose an infrared tunable dual-band polarization filter in this paper. Based on the perfect absorption characteristic of the metal-dielectric-metal sandwich structure, the reflection spectrum performs as a filter. The calculated results show that different dual-band wavelengths are filtered while the incident lig…
In this paper, we first review the theoretical model and numerical algorithm for the simulation study of the surface plasmon (SP) coupling with a radiating dipole in an InGaN/GaN quantum well to demonstrate the advantages of SP-coupled light-emitting diode (LED) in the visible range, including internal quantum efficie…
We present first-principles calculations to study the heterojunction between a wurtzite GaN(0001) film and a hexagonal Gd2O3(0001) substrate. We report that the most favorable Gd2O3(0001) surface is O terminated. Using the work of adhesion of isolated GaN and Gd2O3slabs, our calculated interface energies suggest that…
The composite materials have received great attention due to their light weight, high performance, environment friendly and wear resistance properties and excellent tribololgical properties over the metals and their alloys. There is a good scope to develop new aluminum based composite material which will further impro…
در این مقاله، حذف فلزات سنگین آرسنیک و سرب توسط نانوبنتونیت اصلاح شده (پوشش داده شده با چیتوسان و کربوکسی متیل چیتوسان) بررسی شده است. ابتدا راندمان حذف فلزات سنگین آرسنیک و سرب در شرایط ثابت و یکسان توسط نانو بنتونیت و نانو بنتونیت اصلاح شده مقایسه شد. در ادامه پارامترهایمؤثّرنظیر pH، مقدار نانو جاذب، زمان تماس و غلظ…
Presents the recipients of the RAS Society 2015 IERA Award Joint Winners.
Composite beam is a combination of concrete and steel profiles. Nominal flexural strengthanalysis of composite cross-section can be calculated manually, but it takes a long time or are notefficient when calculating the nominal flexural strength analysis of composite beams. In this study,it can be a formulation of the…
This research is aimed to undertake a comparative study on stability and thermal degradation kinetics of un-irradiated and high energy protons irradiated polyvinyl butyral (PVB) based on weight loss analysis and non-isothermal approaches. The weight loss by the un-irradiated PVB upon heating was found to be in two sta…
Composites with carbon nanotubes are becoming increasingly used in energy storage and electronic devices, due to incorporated excellent properties from carbon nanotubes and polymers. Although their properties make them more attractive than conventional smart materials, their electrical properties have been found to be…
This article has been withdrawn at the request of the author(s) and/or editor. The Publisher apologizes for any inconvenience this may cause. The full Elsevier Policy on Article Withdrawal can be found at http://www.elsevier.com/locate/withdrawalpolicy.
It is well supported that target templates held in visual short-term memory guide visual search (Desimone & Duncan, 1995; Wolfe, 1994). We investigated how template precision is affected by search context. Following previous research, participants searched RSVP streams for an orange letter and reported its presence or…
Diffractive retarders fabricated from gratings in isotropic materials are analyzed by rigorous coupled wave analysis. Calculations show it is difficult to obtain substantial retardance with isotropic phase gratings. Even for an aspect ratio of two, diffractive retarders have a small retardance, < λ/12. Thus it is gene…
The artificially structured metamaterials has led to many potential applications in terahertz regime, but the role in adjusting the terahertz transmission still needs to be carefully investigated. Currently, designs with split ring resonator (SRR) based metamaterials can provide a promising approach for understanding…
Cone shaped resonators have been proposed to create a near perfect metamaterial reflector in the visible range (640nm-680nm). Resonators are made up of high permittivity dielectric (Si). In the considered wavelength range reflectance is above 90% with maximum value of 99.5% at 660nm. It is Mie-Resonance based structur…
We present experimental and theoretical study of the transmission of linearly polarized microwaves through a slab of negative index of refraction metamaterials. A metamaterial slab was designed with an extended S-Shaped Split Ring Resonator (ES-SRR) to exhibit a negative index of refraction around 13.25 +/- 0.75 GHz w…
Understanding the fundamental mechanisms behind the radiation resistance of polymers and molecules would allow us to tailor new materials with enhanced performance in space and adverse environments. Previous studies of the radiation effects on polymer-based photonic materials indicate that they are very dependent on t…
We show that a previously derived LCR model for a plasmonic waveguide can be generalized to a model for hyperbolic metamaterials (HMMs). An analysis of previous work and a generalization into a multilayer structure is presented. The physical significance and practical applications are discussed.
The field of two-dimensional (2D) materials has the potential to enable unique applications across a wide range of the electromagnetic spectrum. While 2D-layered materials hold promise for next-generation photon-conversion intrinsic limitations and challenges exist that shall be overcome. Here we discuss the intrinsic…