Materials Literature
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During the process of tube drawing takes place adhesive interaction of the metal with the tool. The consequences are defective products and the need for a tool change. The problem of choosing the tool material was examined. The hypothesis of the existence of an analogy between the process of destruction of the frictio…
We have grown ZnO thin films on glass substrate by R.F magnetron sputtering using metallic zinc target. The influences of some parameters on thin film optical properties were assessed. They exhibited extremely high resistivity of 1012 Ω.cm, an energy gap of 3.3 eV at room temperature. It was found that a R.F power o…
We have studied the synthesis of lithium ion conducting Li 0.5 La 0.5 TiO 3 oxide ceramics by a sol-gel process followed by calcination of a precursor at 1000°C, which ensured the preparation of phase-pure crystalline Li 0.5 La 0.5 TiO 3 with a room-temperature electrical conductivity of 8 × 10 −4 S/cm. The synthesize…
Structural relaxation in a ${\mathrm{Sr}}_{2}{\mathrm{CrReO}}_{6}$ epitaxial film, which exhibits strong spin-orbit coupling, leads to depth-dependent magnetism. We combine two depth-resolved synchrotron x-ray techniques---two-dimensional reciprocal space mapping and x-ray magnetic circular dichroism---to quantitative…
The paper is a literature review concerning the synthesis and characterization of polymeric materials containing silsesquioxanes (POSS). The methods of preparation of the functionalized POSS-containing hybrid polymeric materials using click chemistry, polycondensation, polyaddition, ring-opening metathesis and free-ra…
A new class of point defects was recently discovered in sheets of non-stoichiometric transition metal dichalcogenides, two-dimensional (2D) materials with a trigonal prismatic lattice. Using ab initio calculations, we study the morphology and energetics of such defects, which involve 60° rotations of covalent bonds, i…
The presence of non-autologous major histocompatibility complex class I (MHC-I) molecules on the surface of the grafted cells is one of the main reasons for their rejection in non-syngeneic hosts. We present a straightforward strategy to decrease the presence of MHC-I by shRNA inhibition of beta-2-microglobulin (B2M),…
An Mn-steel matrix composite locally reinforced with in situ TiC-TiB2 ceramic particulates was successfully fabricated via a self-propagating high-temperature synthesis (SHS) casting route in a Cu-Ti-B4C system with various Cu contents. The effect of the Cu content on wear behavior, wear surface, and wear mechanism of…
ABSTRACT Water‐soluble cationic polypyrrole, poly(N‐(4‐butyl‐(1‐methylimidazole)) pyrrole bromide) (PNBMIP‐Br), was synthesized and applied for base pair mismatched oligonucleotides detection. Interactions between PNBMIP‐Br and a series of oligonucleotides, including ss‐DNA and base pair mismatched ds‐DNA were studied…
A thermosetting resin system, bismaleimide (BMI) modified allyl novolac (BAN), was developed via reactive blending of formaldehyde and catalyst drop wise to improve the extent of reaction between BMI and phenol‐carbenium ions. For improving the curing behavior and mechanical properties, dicumyl peroxide (DCP) was sele…
Pulsed wire discharge (PWD) is one of the many nanoparticle preparation methods known for its high efficiency and high production rate. Particle size is controlled by gas pressure and input energy. However, the effect of ambient gas species on particle size is not well known. In this study, single-phase palladium (Pd)…
ABSTRACT Synthesis of three arms star‐shaped poly‐β‐alanine (3‐b‐ala) based on tri(prop‐2‐yn‐1‐yl) benzene‐1,3,5‐tricarboxylate (TBT) and azido terminated poly‐β‐alanine (N3‐P‐ala) was performed using click reaction. TBT was synthesized by nucleophilic substitution reaction between propargyl alcohol and 1,3,5‐benzenet…
The electronic structure and thermodynamic properties of Cu3V2O8 compound for three structures (P-1, P21/c and Cmca) are reported. The calculations are performed by using full-potential local orbital minimum basis method. The total electronic densities of states for all structures have the similar shape but the detail…
We show that our real-space finite-difference scheme allows us to perform density-functional calculations for nanometer-scale targets containing more than 100 000 atoms. This real-space scheme is applied to twisted bilayer graphene, clarifying that Moiré pattern induced in the slightly twisted bilayer graphene drastic…
Photodoping phenomenon is observed when a double-layer consisting of an amorphous chalcogenide film (As2S3, GeS2, GeSe2 etc.) and a metal (Ag, Cu etc.) film is illuminated by light. The metal diffuses abnormally into the amorphous chalcogenide layer. Amorphous chalcogenide films of GeS2 with an Ag over layer exhibited…
Diatoms are single cellular algae encapsulated in an external wall of micro-structured porous silica called the frustule. Diatoms are present in all water environments and contribute with 20-25 % of the global primary production of oxygen by photosynthesis. The appearance of the frustule is very species dependent with…
Bioinspired silicification has attracted a great deal of attention as a cytocompatible method for encapsulating proteins and living cells. Although bioinspired silicification has successfully been applied to the individual encapsulation of the microbial cells that possess durable cell walls, the conditions for the sil…
Extreme ultraviolet (EUV) microscopy is invaluable for the development of EUV photomasks, providing detailed information for the creation of new mask processes, and reliable feedback for comparison with printing studies. The SHARP microscope at Lawrence Berkeley National Laboratory is dedicated to photomask research.…
We demonstrate that the surface passivation of crystalline silicon and thermal stability of atomic layer deposited (ALD) Al2O3 can be substantially improved by replacing the conventional aluminium precursor trimethylaluminium (TMA) with low-cost dimethylaluminium chloride (DMACl). A film thickness as low as 6 nm is en…
ABSTRACT An easy method for preparing supported homogeneous epoxy–amine thin films on a silica surface consisting of two distinct layers was developed via spin coating from epoxy–amine solutions. Because of these two layers had the controlled properties of the upper layer, we showed that it was possible to precisely c…