Materials Literature
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Manganoquadratite, ideally AgMnAsS3, is a new mineral from the Uchucchacua polymetallic deposit, Oyon district, Catajambo, Lima Department, Peru. It occurs as dark gray, anhedral to subhedral grains up 0.5 mm across, closely associated with alabandite, Mn-rich calcite, Mn-rich sphalerite, proustite, pyrite, pyrrhotite…
The structure determination of synthetic LiAlGe 2 O 6 [Z = 4, space group P2 1 /n, a = 9.8892(5), b = 8.3929(5), c = 5.3995(3) Å, b = 110.646(3)°], is a new pyroxene structure-type, and represents the first structural example of P2 1 /n pyroxene symmetry. The crystal structure of the Ge-analog phase of spodumene was s…
Hybrid nanostructured arrays based on carbon nanotubes (CNT) and palladium or titanium dioxide materials have been synthesized using self-supported and silicon-supported anodized aluminum oxide (AAO) as nanoporous template. It is well demonstrated that carbon nanotubes can be grown using these membranes and hydrocarbo…
We have measured the Hall coefficient RH and the electrical conductivity σ of a series of ultrathin (∼55 nm) Al:ZnO films. These films reveal mesoscopic characteristics in electrical transport properties, i.e., both RH and σ obey lnT law in a wide temperature range (from liquid-helium temperatures to ∼100 K for RH and…
We report the biomacromolecular self-assembly of histidine acid phosphatase (HAP), an enzyme of significant biomedical and industrial importance, in the ionic liquid (IL) 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF(4)]). The spontaneous self-assembly of HAP enzyme in [BMIM][BF(4)] results in the formation…
The electron-microprobe analyses of the studied twinnite material from Jas Roux, France, show a uniform chemical composition Pb 0.80 Tl 0.05 Sb 1.31 As 0.80 S 4.04 . Twinnite is monoclinic; the space group is P 2 1 / n. Lattice parameters obtained from single-crystal diffractometer data are a = 7.997(2) Å, b = 19.517(…
Abstract A single‐chain magnet (SCM) with 1D EO ‐azide‐cobalt chains has been previously synthesized from a solvothermal reaction of Co(NO 3 ) 2 , NaN 3 , and 1,4‐bis(imidazol‐1‐yl)benzene (bib). Herein the template HNO 3 is introduced into the above reaction system and another new coordination polymer ( 1 ) is obtain…
Birch xylan (4-O-methylglucuronoxylan) isolated from a kraft cooking liquor was delignified and grafted with polylactide of predictable branch length. This graft copolymerization resulted in very high total yields, greater than 90%, and with less than 10% polylactide homopolymer byproducts. Mild reaction conditions (4…
Anion-radicals of general formula [MTFcP] - ( M = 2H, Zn, InCl , and InFc; TFcP 2- is a dianion of 5,10,15,20-tetraferrocenylporphyrin) were prepared for the first time in situ by controlled potential reduction of the respective neutral MTFcP complexes in a thin layer spectroelectrochemical cell. UV-vis spectroscopy r…
Abstract Rigid rod polyisocyanopeptides bearing phthalocyanines as pendant groups have been synthesised through CuAAC of polyisocyanopeptides containing acetylene groups with zinc(II) phthalocyanine azide. As confirmed by UV/Vis, fluorescence, and circular dichroism spectroscopies, the phthalocyanines are arranged in…
Chain length, size, composition, surface charge, and other properties of polymeric materials affect their recognition and uptake by cells and must be optimized to deliver polymers selectively to their target. However, it is often not possible to precisely modify selected properties without changing other parameters. T…
Here we report a non-contact method for microwave surface impedance measurements of reduced graphene oxide samples using a high Q dielectric resonator perturbation technique, with the aim of studying the water content of graphene oxide flakes. Measurements are made before, during and after heating and cooling cycles.…
Enicostemma littorale Blume (family Gentianaceae) is a perennial herb and found throughout India, most commonly in coastal areas. Ancient literature suggests the aqueous extract of the plant was used in the treatment of diabetes, fever, rheumatism, stomachache, dyspepsia, hernia, itching, insect poisoning and malaria.…
Highly efficient aerobic epoxidation of olefins catalyzed by cationic meso-tetrakis-(1-methyl-4-pyridyl) (TM4PyP) metalloporphyrins immobilized into montmorillonite (MT) interlayer was achieved. The heterogeneous catalysts were characterized by diffuse reflectance UV spectra, infrared, X-ray diffraction, nitrogen adso…
Thin films of VOx (1.3 ≤ x ≤ 2) were deposited by reactive pulsed-dc magnetron sputtering of a vanadium metal target while RF-biasing the substrate. Rutherford back scattering, glancing angle x-ray, and cross-sectional transmission electron microscopy measurements revealed the formation of nanocolumns with nanotwins w…
The ac magnetostriction in electrical steel is commonly characterized in the time domain (e.g., the peak-to-peak, zero-to-peak amplitude) and also in the frequency domain (e.g., a harmonic analysis). However, due to the dynamical coupling of the test sample with the experimental setup, the characterization of the magn…
Mn(2+)-doped ZnS nanoparticles have been successfully synthesized by a chemical precipitation method, using non-ionic surfactants such as PMMA and PEG. The particles were prepared in an air atmosphere at 80 °C. X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-visible and photoluminescence (PL) studi…
The low-temperature heat capacity behavior of synthetic katoite, Ca 3 Al 2 H 12 O 12 , was investigated for the first time using microcalorimetry. The sample was synthesized hydrothermally in Au capsules at 250 °C and 3 kb water pressure. X-ray powder measurements show that about 98-99% katoite was obtained. Heat capa…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Chendong Gu, Kan Yao, Weixin Lu, Yun Lai, Huanyang Chen, Bo Hou, Xunya Jiang; Experimental realiz…
High-angle annular dark-field scanning transmission electron microscopy and molecular dynamic simulation are applied to study the misfit dislocations at the GaSb/GaAs interface. In the investigated samples, three types of misfit dislocations have been observed: shuffle and glide set Lomer dislocations and 60° dislocat…