Materials Literature
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p-Type thin films of copper-strontium oxide (Cu-Sr-O) have been deposited by e-beam evaporation technique on microscopic glass substrates. A study of optical, electrical and structural properties was performed on the thin films, varying temperature of annealing. Amorphous Cu-Sr-O films were obtained at low temperature…
Structural and magnetic properties of diluted magnetic semiconductor Ge1-xFexTe thin films are investigated. The conventional structure analysis shows c-axis orientation with columnar growth of the films and no indication of Fe clusters or second phase. Magnetic measurements combined with theory models reveal that two…
In situ Co K-edge quick-EXAFS (QEXAFS) coupled with temperature-programmed oxidation as well as ex situ XAFS was applied to investigating the mechanism for enhancing the dispersion of Co(3)O(4) nanoparticles in a calcined Co/SiO(2) Fischer-Tropsch synthesis catalyst prepared by adding triethylene glycol (TEG) to a Co(…
A quantitative demonstration of reversible stiffness upon appropriate light stimulus in a spiropyran-polymeric composite is presented. The polymeric films containing 3% wt. of the photochromic spiropyran were irradiated with alternating ultraviolet and visible light and the storage modulus was measured. A reversible c…
The “confinement length scale”, defined as the critical spacing where deviations from bulk behaviors begin, is widely examined with confined molecular and colloidal liquids, yet its origin and relationship to cooperative motion remain an open question. In this work, we examine the correlation between the sizes of coop…
In this article, we describe the synthesis of a perfluoro-tagged polyglycerol dendron and its aggregation behavior in the presence of polyglycerol dendrimers with perfluorinated shells in water. The perfluoro-alkyl–perfluoro-alkyl interactions between the perfluorinated shells of the dendrimers and the perfluorinated…
We report on a new metastable modification of GeBi${}_{2}$Te${}_{4}$ obtained by high-pressure high-temperature synthesis. It crystallizes in the CuPt type; different nanostructures are induced by various temperature programs under a constant pressure of 12 GPa. The particle size changes from 10 nm in quenched samples…
Nanocrystalline PbTiO 3 in tetragonal form has been successfully prepared via a newly developed environmentally friendly coprecipitation process. The formation process of lead titanate from the PbC 2 O 4 ·TiO 2 precursor was monitored using DTA–TG, XRD, FT-IR, and TEM techniques. XRD showed the phase transition of les…
This paper deals with the experimental characterization of discharges propagating over insulators of epoxy and glass, immersed in a gas or a gaseous mixture, under lightning impulse voltages (1.2/50 μs), using a point-plane electrode arrangement. The gases and mixtures we considered are SF6, N2, CO2, SF6-N2 and SF6-CO…
Promoted hydrogen release from ammonia borane (NH(3)BH(3), AB) with mannitol (C(6)H(8)(OH)(6), MA) additive is reported. It is found that for the MA/2AB sample, the dehydrogenation temperature is lowered by ~25 °C compared to that of neat AB, the liberation of undesired byproduct borazine is suppressed, and the releas…
A family of the diphosphines PPh(2)C(2)(C(6)H(4))(n)C(2)PPh(2) (n = 0-3), which possess a dialkynyl-arene spacer between the phosphorus atoms, was used for the synthesis of a series of bimetallic gold(I) complexes 1-7. Unlike the corresponding polynuclear Au(i) clusters, which show unique phosphorescence, 1-7 reveal d…
Abstract A computational approach has been carried out on liquid crystalline disubstituted biphenylcyclohexanes (BCHs) of general formula R‐C 6 H 10 ‐C 6 H 4 ‐C 6 H 4 ‐X with R: C 3 H 7 ; X: H (BCH30) and R: C 5 H 11 ; X: CN (BCH5CN) using the CNDO/S + CI and INDO/S + CI methods. These methods have been employed to ca…
Silanization with APTES for Controlling the Interactions Between Stainless Steel and Biocomponents: Reality vs Expectation
The lateral diffusion of ionic fluorescent molecules atop polyelectrolyte brushes was adopted to probe the distribution of counterions of the polyelectrolyte brushes. With a combination of single molecule fluorescence techniques, fluorescence correlation spectroscopy and single molecule fluorescence imaging, the later…
Abstract Synthesis and characterization of polymer nanocomposites consisting of diglycidyl ether of bisphenol‐A with inorganic as well as organically modified nanosized clay fillers, for example, vermiculites and montmorillonite, obtained from trade, are studied. Confirmations of intercalation and exfoliation characte…
Without employing ad hoc assumptions, various equations and solutions for plane problems of one-dimensional quasicrystals are deduced systematically. A method for the exact solution of three-dimensional equations is presented under homogeneous and nonhomogeneous boundary conditions. The equations and solutions are use…
Here, we demonstrate a structural interaction between LaAlO${}_{3}$ thin films and SrTiO${}_{3}$ substrates using high-resolution x-ray diffraction. X-ray diffraction profiles reveal the presence of periodic lattice distortions in the LaAlO${}_{3}$ thin films, whose in-plane periodicity is determined by the miscut ang…
Linear magnetoelectric (ME) effect provides an ideal way to control magnetism by an external electric field and has long been pursued in spintronics. However, the essential conditions for linear ME effects are still not well understood, especially for the newly emerged metal-free ME systems. Here, using density functi…
Modern ceramic materials have, thanks to their crystallographic structure and strong atomic bonds, many excellent properties, such as extremely high hardness, strength, high thermal and chemical stability, high corrosion resistance, and wear resistance. Their weakness is low fracture toughness and crack growth resista…
Despite intensive effort, the majority of the annotated Mycobacterium tuberculosis genome consists of genes encoding proteins of unknown or poorly understood function. For example, there are seven conserved hypothetical proteins annotated as homologs of pyridoxine 5'-phosphate oxidase (PNPOx), an enzyme that oxidizes…