Materials Literature
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A combined molecular-beam and quantum-simulation study that explores the catalytic behavior of tiny platinum clusters calls into question a well-established precept regarding the influence of structure on the reactivity of solid catalysts (Nat. Commun. 2016, DOI: 10.1038/ncomms10389). Years of experiments have shown t…
The use of ultrasonic transducers with a central hollow is suggested for improved single-beam acoustical tweezers applications. Within the framework of the Fresnel-Kirchhoff parabolic approximation, a closed-form partial-wave series expansion (PWSE) for the incident velocity potential (or pressure) field is derived fo…
In a world of technologies built on quantum materials, computers will work a million times faster than today’s supercomputers while using a fraction as much energy. Electricity will be generated, transmitted, and used with almost no losses. Smart building materials, fabrics, and electronic devices will change their pr…
AccessScience is an authoritative and dynamic online resource that contains incisively written, high-quality educational material covering all major scientific disciplines. An acclaimed gateway to scientific knowledge, AccessScience is continually expanding the ways it can demonstrate and explain core, trustworthy sci…
Chapter 5 in High-Luminosity Large Hadron Collider (HL-LHC) : Preliminary Design Report. The Large Hadron Collider (LHC) is one of the largest scientific instruments ever built. Since opening up a new energy frontier for exploration in 2010, it has gathered a global user community of about 7,000 scientists working in…
ABSTRAK Perhitungan analisa konstruksi dudukan motor servo cnc plasma cutting Perhitungan ini bertujuan untuk menganalisa layak atau tidak suatu benda yang di uji. Dan mengetahui bagaimana kekuatan kostruksi dudukan motor stepper mesin cnc plasma cutting. Terdiri dari perhitungan konstruksi, Sambungan las, mur dan bau…
Fuel Cells (FC) are electrochemical energy converters that deliver higher efficiency and energy density than conventional power source energy. Temperature and current distributions in the cell of Proton Exchange Membrane Fuel Cells (PEMFC) are necessary to design the cooling system and optimizing of operating conditio…
One of the various problems which mankind faces as it enters into the 21st century is the crisis of waste disposal management. The large amount of scrap and worn out tyres called waste tyre rubber (WTR) discarded has been recorded as a major sources of pollutants (Karger 2013). This emerging problem obliges contempora…
Hyperbolic metamaterials are extremely anisotropic materials with iso-frequency surfaces shaped as hyperboloids, unlike natural materials. These metamaterials are interesting for many applications thanks to the large density of states and the extreme confinement of light they provide. We show that the dispersion of me…
Current photovoltaic (PV) market is strongly dominated by an intense use of silicon. Although it is the second most abundant element on the Earth crust, after oxygen, Si is never present in its pure form but always bounded with other elements, and relatively complex and expensive purification procedures are needed in…
A method of uniaxial crystal growth in wet-processed thin films of the mesogenic phthalocyanine 1,4,8,11,15,18,22,25-octahexylphthalocyanine (C6PcH2) is proposed. It consists of applying geometrically linear thermal stimulation to a supercooled state of liquid crystalline C6PcH2. The thin film showed highly ordered mo…
Chapter 6 in High-Luminosity Large Hadron Collider (HL-LHC) : Preliminary Design Report. The Large Hadron Collider (LHC) is one of the largest scientific instruments ever built. Since opening up a new energy frontier for exploration in 2010, it has gathered a global user community of about 7,000 scientists working in…
Los aceros para herramientas empleados en herramientas de corte necesitan ser unidos a otro material debido a que no existe ningun tipo en el cual se combinen todas las propiedades requeridas. Los carburos cementados, de alta dureza y resistencia a la abrasion, son un interesante complemento y por ello se van a encont…
Praseodymium+Cerium oxide films were fabricated on p-type Si (100) substrates by the reactive RF magnetron co-sputtering with a metal Pr target and a sintered CeO_2 target in Ar + 10 % O_2. Deposited films were post-annealed in an ambient of nitrogen (N_2) for 30 minutes at temperatures of 300, 500 and 800℃. The XRD m…
The impressive capacity of various metal-organic framework (MOF) compounds to adsorb gases—especially toxic gases such as ammonia—has raised interest in these porous solids for use as gas-mask filtration materials. Filter materials are typically used as powders held in a canister fitted to the front of gas masks. But…
Degradation of 2,6-dibromophenol (2,6-DBP) in the aqueous solution was studied using dielectric barrier discharge in micro-bubbles. Experimental comparison of working gas Ar, N2, O2, and air showed that oxygen and air plasma efficiently decomposed 2,6-DBP to bromide ion, and inorganic carbon. The molecular orbital mod…
Perthitic feldspar weathered in batch reactor (weight ratio feldspar/water ~ 4/15) during long-term (300 day) laboratory experiments at ambient conditions. During first 50 days of the experiment, aqueous concentrations of Si, Al, K, Na, and Ca reached limiting values 3.4x10-4, 9.2x10-5, 1.5x10-4, 1.2x10-4, 1.1x10-4 mo…
Interaction between bayerite, Al(OH)3, and silicic acid, H4SiO4, was studied in slightly acid solutions (pH ~ 4.2) at three Si/Al molar ratios (1:1, 1:3 and 1:5) under using of stirred batch reactors. The initial concentrations of H4SiO4 were 1.65x10-3 mol l-1 in all solutions. Two different concentrations of alkaline…
High temperature characteristics of bipolar-mode operation of normally-off diamond junction field-effect transistors were investigated up to 573 K. As an important factor, the current gain depending on the gate current was analyzed with a theoretical model. We found that the experimental current gain decreased with th…
Here we report a material for low-voltage and micro-scale electrode stimulation, that combines high charge injecting and low impedance characteristics of poly (3, 4-ethylenedioxythiophene) (PEDOT) with a large effective surface area by using a platform of platinum black (Pt-black). The layer-by-layer assembled PEDOT/P…