Materials Literature
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To eliminate the release-delayed phenomenon of macromolecular drug delivery system at the early stage, biodegradable implantable drug delivery system with micro-porous structure was designed by Bio-MEMS technology in this paper. Water absorption and degradation characters of polylactic acid - polyglycolic acid (PLGA)…
Ultrathin graphitic films containing only one or a few graphene layers have received great attention as a promising channel material to make "carbon-based" transistors, particularly for high speed and/or low power electronic devices. Back-gated or front-gated graphene field effect transistors (GFET) made from exfoliat…
The role of artificial polarization in two different applications of the title color center, namely optical properties of F A 2: Sr 2+ center and adsorbate–substrate interactions, is investigated by using quantum mechanical CI-singles and DFT ab initio methods. Clusters of variable sizes were embedded in the simulated…
Microstructural change during creep damage process was investigated on the fine grained heat affected zone (HAZ) and the coarse grained HAZ of 12Cr steel casting base metal welded by 9Cr weld steel, using a scanning electron microscope with electron backscattering diffraction pattern (EBSD) equipment. Creep rupture an…
Abstract Here we describe the newly designed electrochromic(EC) materials to achieve better RGB colors and improved bistability. We also report the color images of the printed reflecting and transparent EC devices showing good reversibility and memory. A reflectance value of above 50% was obtained by using the white r…
The goal of this study is to investigate the mechanism and kinetics of carbidization of the titanium nickelide powder, which allows one to obtain the Ni-TiC composite powder. It is established by experimental methods and theoretical analysis that, in the temperature range 1000–1200°C, this process proceeds in the inte…
Abstract The way to increase efficiency of modern LCD is to remove the absorbing optical components: color filter and dichroic polarizer. Non‐absorbing polarizer together with sub‐millisecond fast LC mode working infield‐sequential RGB mode are the keys to future LCD.
We have investigated the growth and characteristics of nanoscaled thin films of carbon, nickel, and platinum. The nanoscaled thin films were deposited on Si and quartz substrates with or without a surface layer of carbon, nickel, or platinum using a DC magnetron sputter deposition technique. The thicknesses, which wer…
Dissipative particle dynamics (DPD) was carried out to study the copolymerization process of halogen-substituted styrene (ST-X), divinylbenzene (DVB), and dodecane (DO) in aqueous solution. The results showed that properly selecting the sizes of DO and water beads, and choosing the appropriate interaction parameters b…
Abstract Titanium alloys are commonly used to lighten aeronautical structures. Unfortunately, their poor tribological properties need to confer onto the surface both high mechanical resistance under load and low friction/low wear against other metals. Based on amorphous silicon carbide (a‐SiC:H), periodic multi‐nano‐c…
Abstract We describe a single mode transflective liquid crystal display (LCD) having a multipurpose substrate in a dual cell gap configuration. The multipurpose substrate fabricated by a replica molding technique provides the vertical alignment for the liquid crystal molecules without any surface treatment and bi‐leve…
Silicon was used as the only combustible agent, and single-phase Y-α-SiAlON powders were fabricated from a proper starting composition, but the grain morphology of the products was represented by equiaxed microcrystals. For the same starting materials, as a modified method of combustion synthesis was applied, single-p…
The extended energy-loss fine structure (EELFS) spectra for pure nickel samples (M 2,3 EELFS spectra), a NiO stoichiometric film (nickel M 2,3 EELFS and oxygen K EELFS spectra), and an “inhomogeneous” oxide film (Ni-O system) on the surface of nickel have been obtained. The calculations of amplitudes and intensities o…
Electrically conducting polymers are useful in various applications such as transistors and sensors. A potentiometric pH meter has been developed using polyaniline based working electrode and with improved selectivity using ionophores, the polyaniline based potentiometer has been applied to monitor various ions mainly…
At the invitation of Govindjee, we reprint here the English translation of the letter, in German, that we sent, on behalf of the Senate and the Presidium as well as the members of the German Academy of Sciences Leopoldina, from Halle (Saale), to Professor Dr. Dr. h.c.mult. Achim Trebst on his 80th birthday. The origin…
Abstract Through kinetic Monte Carlo simulations of a catalytic reaction with a complex mechanism, such as the catalytic oxidation of methane, it is shown that the temporal evolution of the adsorbed phase to absorbent states is interpreted by an exponential decay of production. This semiempirical law, which has been u…
Advances in designing and fabricating metamaterials with unique electromagnetic properties have made it possible to raise the question of whether it is possible to create invisible objects. A review was presented earlier of papers on the problem of creating invisible objects whose size is less than or of the order of…
The MoS 2 particles were coated with Al 2 O 3 ratio varying from 5 to 50 wt.% content. Ni – MoS 2/ Al 2 O 3 composite coatings were prepared by means of pulse electrodeposition. The dependence of preferential orientation index and corrosion properties of these composite coatings was investigated in relation to the Al…
An improved method of obtaining gas sulfur using the Claus and Sulfren processes, which provides an increase in its yield to 99.6–99.8%, is suggested. To realize this method, new catalysts are developed, namely, the alumina catalyst for the Claus process, the catalyst for the reduction of SO 2 , the catalyst for the S…
Abstract In this work, we study the effects of pressure on polymer stabilized cholesteric texture (PSCT) normal‐mode light shutter. The externally applied pressure may damage the polymer network and thus change the orientation of the liquid crystal and produce undesired haze in the transparent state. Through material…