Materials Literature
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Graphene shows promise on strain sensor applications, but the piezoresistive sensitivity of perfect graphene is low due to its weak electrical conductivity response upon structural deformation. In this paper, we used nanographene films for ultra-sensitive strain sensors. The piezoresistive sensitivity of nanographene…
The Young's modulus of graphene is estimated by measuring the strain applied by a pressure difference across graphene membranes using Raman spectroscopy. The strain induced on pressurized graphene balloons can be estimated directly from the peak shift of the Raman G band. By comparing the measured strain with numerica…
We report polarization resolved photoluminescence from monolayer ${\mathrm{MoS}}_{2}$, a two-dimensional, noncentrosymmetric crystal with direct energy gaps at two different valleys in momentum space. The inherent chiral optical selectivity allows exciting one of these valleys, and close to 90$%$ polarized emission at…
Magnesium aluminate (MgAl2O4) spinel (MAS) is a synthetic material with cubic crystal structure and excellent chemical, thermal, dielectric, mechanical and optical properties. These properties made MAS an indispensable material for optically transparent windows, domes and armours, and for certain refractory applicatio…
[Departement_IRSTEA]Ecotechnologies [TR1_IRSTEA]SPEE
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This article is withdrawn since it is published in a journal\n We report on the first reduction methodology, compatible with flexible,\ntemperature sensitive substrates, for the production of reduced spin coated\ngraphene oxide (GO) electrodes. It is based on the use of a laser beam for the\nin-situ, non-thermal, redu…
A new type of water droplet transportation on microstructured hydrophobic surface is proposed and investigated experimentally and theoretically - water droplet could be driven by scale effect which is different from the traditional methods. Gradient microstructured hydrophobic surface is fabricated in which the area f…
A new sulfur-and-zinc-based metal-organic framework (MOF) compound conducts charge nearly as well as the most conductive organic semiconductors, a team of researchers based in the U.S. and Japan report in the Journal of the American Chemical Society (DOI: 10.1021/ja3059827). The study demonstrates that a typically non…
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In the soft recoil system, the recoiling parts are initially accelerated to the forward direction. These parts are returned to original position by the firing with intial acceleration speed. The latch of the soft recoil system keeps the high impact load when the recoil parts were recuperated to the forward direction.…
In order to find the structural characteristics of the thin films of group II-VI semiconductor compounds compared with those of powder materials, films were made of 4 powders of ZnS, CdS, CdSe, and CdTe(Aldrich), each with 99.99 % purity. For the ZnS/CdS multi-layers, the ZnS layer was coated over the CdS layer on an…
The microstructure and electrical properties of Al2O3-Mo composites were investigated. Different amounts of molybdenum (5, 10, 20, 25 vol%) were added to alumina matrix and the resulting mixture was hot pressed to produce dense metal toughened-ceramic composites. The electrical properties of the composites were examin…
Recently fuel cell is considered to be a new technology that can substitute the ICE(Internal Combustion Engine) as well as overcome environmental issues. In military applications, fuel cell has an unique advantages, which are quietness, namely, stealth. The environmental requirement such as shock and vibration in mili…
Quest for Dr. Yia-Chung Chang's Calculations about the superlattice phonon band structures
采用脱色菌Citrobacter sp. CK3,以活性红KN-3B染料为处理对象,在厌氧批式反应条件下,系统考察了pH值,温度和染料浓度对脱色反应速度的影响;通过动力学模拟及反应过程中染料的UV-Vis扫描图分析,探讨了脱色反应机理。结果表明：Citrobacter sp. CK3对活性红KN-3B的脱色反应的适宜pH为7～9;脱色反应速度在温度为32℃时达到最大。染料初浓度从57 mg/L逐渐增大到458 mg/L时脱色率逐渐降低。脱色过程中染料的偶氮键发生断裂,脱色反应符合二级反应动力学。
In this paper we study from a numerical analysis perspective the Fractional\nStep Kinetic Monte Carlo (FS-KMC) algorithms proposed in [1] for the parallel\nsimulation of spatially distributed particle systems on a lattice. FS-KMC are\nfractional step algorithms with a time-stepping window $\\Delta t$, and as such\nthe…
The scope of this chapter is to present a review of relatively recent research work on operations and processes that involve the interaction of natural zeolites with organic vapors or gases, in a simple and comprehensive way. The time horizon for the bibliographic search was set at 20 years back. Modified natural zeol…