Materials Literature
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ADVERTISEMENT RETURN TO ISSUEEditorialNEXTExceeding the Limit in Solar Energy Conversion with Multiple ExcitonsXiaoyang ZhuView Author Information Columbia UniversityCite this: Acc. Chem. Res. 2013, 46, 6, 1239–1241Publication Date (Web):June 18, 2013Publication History Published online18 June 2013Published inissue 18…
The Al_2O_3 - SiC composite powders were prepared in argon atmosphere using coal gangue and carbonaceous materials carbon black,active carbon and anthracite) as starting materials by carbothermal reduction. Effects of excessive carbon addition,carbon types, temperature,soaking time,shaping pressure,types and amount of…
Microporous materials such as zeolites and amorphous carbons show a characteristic signature in terms of deformation as a result of micropore filling. Here we present analysis of synthetic microporous carbons with different annealing temperatures and consequently different average micropore sizes by gas adsorption com…
Ronald Reagan Washington National Airport (DCA) is one of the busiest airports in the country with more than two-hundred thousand operations in 2011. A steady flow of daily flights occur from 6 a.m. to 11 p.m. Runway 1-19 is the primary runway at DCA, which carries approximately 90 percent of all operations. The exist…
Titanium plays a key role in the competitiveness of the aerospace industry due to its advantageous properties and weight saving attributes. Research show that since 1970 the air traffic has doubled every fifteen years and it is expected that this growth trend will continue for the next fifteen years. This growth along…
In the title complex, [Mn(C20H14N2O2)Cl]·CH3OH, the central Mn(III) atom displays a distorted square-pyramidal coordination by two N and two O atoms from the tetradentate 2,2'-[1,2-phenyl-enebis(nitrilo-methanylyl-idyne)]diphenolate ligand and one chloride ligand. The Mn(III) atom is 0.525 (4) Å out of the square basa…
Hybrid diamondlike carbon (h-DLC) coatings for multispectral use combine the hardness of protective DLC coatings with the multispectral functionality of high-end IR coatings.
The design and test results of a current-sensing system used for the protection of frequency converters, which are used for controlling the speeds of ac induction motors, are presented. The proposed pulse current-sensing system consists of a magnetic field sensor, which is made of thin polycrystalline La-Sr-Mn-O manga…
Because of their mineralogy, active clays are very sensitive to changes in the type and concentration of species dissolved in the pore water. At a molecular level, this sensitivity can be explained by variations in the short range interaction forces acting between clay platelets immersed in the pore water. While model…
Magnetic interactions are induced between non-magnetic, vertically aligned tin dioxide nanowires under field-emission conditions. Vertically aligned nanowires of tin dioxide are synthesized along the [100] direction by pulsed laser deposition of an epitaxial (200) seed layer on c-cut sapphire substrates followed by va…
Recent developments in the Mid Wave InfraRed (MWIR) optical domain were made on materials, optical design and manufacturing. They answer increasing demands for more compact, less temperature dependent optical systems with increased optical performances and complexity (multi- or hyper- spectral imagery). At the same ti…
Dual-band infrared camera systems allow viewing and comparison of the 3-5µ and 8-12µ spectrum regions, improve visibility at sunrise/sunset and help distinguish between targets and decoys. They also enhance the ability to defeat many IR countermeasures such as smoke, camouflage and flares. As dual band 3rd generation…
Spectra of the negative ion fraction in the low field emission from MPG-8 graphite with rough surface and tungsten surface with nano fuzz as a function of the residual gas composition and pressure are measured and analyzed. The intensity of the emitted negative ions increases linearly with the pressure of the working…
The authors report the growth of β-Ga2O3nanowires and the conversion of β-Ga2O3nanowires to gallium nitride (GaN) nanowires through ammonification, and the fabrication of nanowires-based field emitters. The threshold field of Ga2O3nanowires was 5.65 V/μm. After ammonification under 750, 800 and 900°C, the threshold fi…
The interaction between gold nanoparticles and glucose and its effect on the fluorescence spectrum of nanoparticles were investigated experimentally. It was observed after this interaction the intensity of fluorescence peak becomes weaker and red shifted.
Current infrared imaging systems monitor emission from a given scene over a broad spectral range, which results with black and white images. As a result, there is ever increasing emphasis on the development of new, on the pixel level, infrared imaging technology that can provide spectral information. Attempts at creat…
An infrared (IR) transparent window is necessary for the IR sensor package. The most commonly used materials for IR transparent window are germanium (Ge) and silicon (Si). Ge has excellent optical properties but also the disadvantage of expensive price. Si has merits such as inexpensive cost and CMOS process compatibi…
Pterins are a group of biological compounds which have potential for use as a possible cancer diagnostic. This paper considers reproducibility issues using Surface Enhanced Raman Scattering (SERS) for application in pterin detection.
W publikacji przedstawiono wyniki badan metalograficznych stopu magnezu AZ91 - wlewka surowego i po procesach przesycania oraz wspolbieznie wyciskanych pretow. Procesy wyciskania prowadzono w temperaturze: 280oC, 300oC, 316oC i 338oC przy wspolczynniku wydluzenia λ wynoszącym 4,14 i 5,78 odpowiednio dla średnic wycisk…
The main research objective is to study the hydrogen production and more particularly toexamine in details the effect of reaction conditions on the catalytic processing of methanedecomposition. The H2 production were conducted in a quartz tube fixed bed reactor over threekinds of catalysts Fe/AC(Locally prepared), γ-A…