Materials Literature
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Introduction: As an emerging science in its infancy, nanotechnology promises the nano - scale manufacture of materials and mechanics made to atomic specifica...
Several new high temperature reactor concepts, referred to as Fluoride Salt Cooled High Temperature Reactors (FHRs), have been developed over the past decade. These FHRs use a liquid salt coolant combined with high temperature gas-cooled reactor fuels (TRISO) and graphite structural materials to provide a reactor that…
Metalloporphyrins play a vital role at the active sites of certain enzymes that facilitate several critical processes. Synthetic metallporphyrins and their analogs serve as biomimetic reagents used to gain insight into the complex mechanistic details of enzymatic reactions, as well as proving to be useful catalysts in…
As the device dimension in semiconductor silicon transistors reach sub-20nm, it significantly enhances the tolerance limits on the size and concentration of defects in the underlying crystalline silicon wafer. Understanding the evolution of defect clusters is critical for controlling the defect density and size distri…
Abstract : The principal goal of this DARPA Seedling project was to develop an oxide-based single-electron transistor and memory based on complex oxide nanostructures. The challenge was to create a device with ultra-high density and ultra-low power consumption, comparable to fundamental limits (kT/gate operation) for…
High quality NaYF4:Eu3+ luminescent materials were successfully synthesized via a facile template technique by hydrothermal method.The samples were characterized by X-ray powder diffraction(XRD),transmission electron microscopy(TEM) and fluorescence spectroscopy(FS).The incorporating of Eu3+ ions into NaYF4 crystal la…
A fundamental step towards a quantitative assessment of the risks of new compounds or pollutants (chemicals, materials) to the environment is to estimate their environmental concentrations. Thus, the calculation of predicted environmental concentrations (PEC) comprises the basis for an initial exposure assessment. Pot…
超级严肃地被采用为铜粉末的准备提高电解反应。铜粉末的形态学，微观结构和尺寸被扫描电子显微镜学， X 光检查 diffractometry 和激光粒子分析描绘。结果显示在超级严肃地下面的电解的铜粉末的当前的效率在正常严肃状况下面与那相比增加了超过 20% 。在超级严肃地下面的房间电压也低得多。铜粉末的尺寸随严肃系数(G) 的增加减少了。当前的效率的增加能被贡献电极 / 电解质接口的骚乱和在超级严肃的 Cu2+ 的提高的集体转移域。同时，巨大的严肃加速将在电解过程期间从电极表面支持铜粉末的分开，它能阻止铜粉末的生长。
Catalysts are critical to nearly all industrial processes. They transform toxic effluents to more environmentally friendly compounds, they make fiscally unattractive processes economically viable, and reduce the quantities of feedstock needed to make a product. Understanding how a catalyst functions enables one to bet…
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, June 2010.
介绍CCS技术的发展和现状，列举法国道达尔（Total）石油公司和挪威国家石油（Statoil）公司经过周密的准备，各自在CCS试验性项目方面取得成功，证明CCS技术是成熟可靠的。指出目前是中国发展CCS技术的良好时机，建议制订发展CCS技术目标规划并逐步完成．达到最终提升中国在CCS技术开发方面的竞争力。
The main focus of this thesis was the physical interpretation of the pumping cross-section. This was achieved by performing a statistical analysis of single molecule vibrational pumping events in which both the SERS and pumping cross-sections could be measured simultaneously. Samples were constructed in which small ag…
In this work, LiMn1.9Fe0.1O4 and LiMn1.5Fe0.5O4 were prepared by sol‐gel method according to proper stoichiometric ratio. It is then calcined at 850° C for 24 hours. Characterization studies of final products were done using XRD, FESEM, cyclic voltammetry (CV) and charge—discharge characteristics. Phase composition of…
Difficult character of cooperation of constructive elements with environment, and also among themselves, the casual nature of durability of materials and service conditions of engines demand in calculations on durability of application of probabilistic methods of the analysis and use of indicators of the theory of rel…
Infrared spectroscopy has been employed to study the molecular self-association of the methyl pyrrole-2-carboxylate (MPC) and 2-(trifluoroacetyl)pyrrole(TFP) in various solvents at different temperatures. In the dilute solution, the IR spectra of TFP shows two bands in the N-H stretching vibrational regions. The band…
Organic light emitting diodes (OLEDs) have great potential to replace current commercial display offerings. However, most of the materials comprising the OLEDs suffer degradation effects from the presence of environmental oxygen and water, as both compounds can penetrate into the device. Much research and effort have…
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 J. K. Wong, K. P. Lim, S. A. Halim, S. K. Chen, S. W. Ng; Sintering Temperature Study on Structur…
The microstructure of butadiene-nitrile rubbers with different content of acrylonitrile monomer 20...50 % has been analyzed in details by the method of NMR-spectroscopy. The content of [1,2]-, [1,4]-butadiene (B) and acrylonitrile links in polymer chain was determined by the 1H NMR-spectroscopy. The content of cis-[1.…
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2010.
We survey the analytical methods which are used to find the conductivity of amorphous solids as a function of temperature, specifically the work done by N. F. Mott and Apsley et al. and we point out the problems with deriving such a relationship. We then develop a self consistent numerical system for calculating the c…