Materials Literature
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The key to highly efficient growth of carbon nanotubes includes two essential ingredients in the growth ambient: a carbon source that does not contain oxygen and a minute quantity of a secondary gas, which does contain oxygen, that acts as a growth enhancer. These and other general rules governing the growth of carbon…
We address the system-size dependence of typical plastic flow events when an amorphous solid is put under a fixed external strain rate at a finite temperature. For system sizes that are accessible to numerical simulations at reasonable strain rates and at low temperatures the magnitude of plastic events grows with the…
Thermal-magnetic noise at ferromagnetic resonance (T-FMR) can be used to measure magnetic perpendicular anisotropy of nanoscale magnetic tunnel junctions (MTJs). For this purpose, T-FMR measurements were conducted with an external magnetic field up to 14 kOe applied perpendicular to the film surface of MgO-based MTJs…
P monodoped and (P, N) codoped ZnO are investigated by the first-principles calculations. It is found that the substitutional P defect at O site (PO) and interstitial P (Pi) contribute little to the p-type conductivity of ZnO samples under equilibrium condition. Zinc vacancies (VZn) and PZn-2VZn complex are demonstrat…
Fluorescent nanodiamonds (FNDs) of 10–20 nm in size have been produced by helium ion irradiation and isolated by differential centrifugation. Spectroscopic characterization of the FNDs with fluorescence microscopy and fluorescence correlation spectroscopy indicates perfect photostability and use as an alternative to f…
Pyrocarbon (PyC), the common interphase for SiC/SiC, is not stable under severe environmental conditions. It could be replaced by boron nitride more resistant to oxidation but poorly compatible with nuclear applications. Other materials, such as ternary carbides seem promising but their use in SiC/SiC has not been dem…
In Ce3+–Yb3+ co-doped Y3Al5O12 (YAG) ceramics, possibility of quantum cutting mechanism converting one visible photon into two NIR photons with optimum quantum efficiency approaching 200% have been investigated. In this material, Yb3+ emissions due to the F25/2-F27/2 in the range of 1 μm were observed upon the excitat…
Line them up: Under hydrothermal conditions, trilacunary Keggin {B-α-PW9O34} fragments and nickel ions form the two largest Ni-substituted poly(polyoxotungstate)s with the greatest number of Ni ions in a known polyoxometalate. Bridging amine ligands connect the fragments to form the 1D structure of the polyoxometalate…
We investigated Raman spectra of single-layer and multilayer graphene under ultraviolet laser excitation at the wavelength λ=325 nm. It was found that while graphene’s G peak remains pronounced in UV Raman spectra, the 2D-band intensity undergoes severe quenching. The evolution of the ratio of the intensities of the G…
The design of advanced functional materials with nanometer- and micrometer-scale control over their properties is of considerable interest for both fundamental and applied studies because of the many potential applications for these materials in the fields of biomedical materials, tissue engineering, and regenerative…
Boron- and nitrogen-doped graphenes are are prepared by the arc discharge between carbon electrodes or by the transformation of nanodiamond under appropriate atmospheres. Using a combination of experiment and theories based on first principles, systematic changes in the carrier-concentration and electronic structure o…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
At textile mills, the fiber fly generation is a big concern almost at every stages of the production including knitting and weaving operations. Therefore, it is not a surprise that the fiber fly generation is still getting the attention of many workers for decades for either production efficiencies or for health reaso…
Abstract The first‐principles full‐potential linearized augmented plane‐wave method based on density functional theory is used to investigate electronic structure and magnetic properties of I A subgroup elements with nitrogen (LiN, NaN, KN, and RbN) in assumed three types of crystalline structure (rock salt, wurtzite,…
A wholly ab initio method for deriving chemical thermodynamic data for inorganic crystals is a useful tool for theoretical research in material science. In this work, all electron density functional computations together with phonon vibrational analysis were used to derive thermodynamic profiles of two polytypes of Si…
Methyl methacrylate-butadiene-styrene (MBS) were prepared by emulsion polymerization method through grafting of styrene (St) and methyl methacrylate (MMA) with varied ratio on polybutadiene (PB) particles. The effect of St/MMA weight ratio of the shell in MBS on the property of PVC/MBS blends was investigated. It was…
Thin laminates (thickness δ = 20–45 nm) of barium titanate, BaTiO3 (BT), have been synthesised by the sol–gel method followed by heating of the amorphous precursor powder in air. An orthorhombic BT polymorph forms along with a tetragonal phase (t-BT) after 2 h of heating the precursor at 600°C, as evidenced by a well-…
Needle-punched nonwoven fabrics were made from 100% jute fiber using various levels of fabric weight, punch density, and depth of needle penetration. The number of variables and their combinations in the experimental plan were selected following a statistical experimental design technique. Various tensile responses or…
Soy protein isolate has been cross-linked with furfural, a bio-based aldehyde and blended with an organoclay Cloisite 30B. The cross-linking process has been ascertained from FTIR data. The structure and apparent interlayer spacing of the SPI/ MMT nanocomposites prepared via solution intercalation has been detected by…