Materials Literature
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The relation between out-of-plane thermal diffusivity of Mo thin film and its synthesized condition is studied. Two types of molybdenum thin film with nominal 100 nm thickness are prepared, one is dc-sputtered at 0.4 Pa in Ar pressure on a Pyrex 7740 glass substrate (film A), and the other is rf-sputtered at 11 Pa in…
An advanced ultrasound/Fenton/nanoscale iron oxidation process was applied for treatment of dye wastewater. In this study, the Taguchi statistical method was used to design experiments for the optimization of the ultrasound/Fenton/nanoscale iron process. The experimental design consisted of testing five factors (dosag…
Graphene has recently emerged as a serious contender for the post silicon era. Graphene nanoribbon (GNR) devices have similar performance characteristics to carbon nanotube (CNT) ones. However, lithographic patterning methods applied to graphene can avoid the degree of chirality control and alignment issues typical of…
Pulsed laser action upon a sample of highly oriented pyrolytic graphite (HOPG) in a gasostat filled with helium at a pressure above that corresponding to the triple point of carbon, followed by rapid quenching of the liquid phase at a rate of about 10 6 K/s leads to the formation of a crater with a periodic spatial st…
We demonstrate the formation of highly ordered twofold symmetric rectangular nanoparticle superlattices by the slow evaporation of solvent from colloidal dispersions of oleic acid/oleylamine-coated Fe3O4 nanoparticles on a water surface. These superlattices covered regions of micrometers in size without any noticeable…
The temperature scaling relations of the dynamic hysteresis were investigated in Zr-rich lead zirconate titanate (PZT) bulk ceramics. At each relation curve, there is a discontinuous district corresponding to the low- and high-temperature phase transitions. The temperatures are divided into low-T region and high-T reg…
As the lightest structural metal, Mg and Mg-based alloys have great potential applications in the aerospace, automotive and nuclear industries. However, such applications have been limited by low ductility and strength. Theoretically, small grain sized structure can synchronously improve its ductility and strength. Ye…
Metastable formation of decagonal quasicrystals during solidification of undercooled Al-Ni melts: In situ observations by synchrotron radiation, Shuleshova, O., Holland-Moritz, D., Löser, W., Reinhart, G., Iles, G. N., Büchner, B.
The study is concerned with the effect of temperature on the structure of SiC films formed by deposition of the C and Si ions with the energy 120 eV. On the basis of the X-ray structural studies, it is unambiguously established that the structure of the growing polytype is finely dependent on the substrate temperature…
We present an extensive study of the exchange bias properties and glassy behavior in low-doped La1−xSrxCoO3 cobaltites. The temperature dependences of the dc magnetization and ac susceptibility indicate that the spin glass state exists even at high magnetic fields. The field-cooled magnetic hysteresis loops exhibit bo…
The influence of thermoplastic/bagasse fiber ratio, as well as electron beam irradiation on the physicomechanical properties of low-density polyethylene (LDPE) and high-density polyethylene (HDPE) composites has been investigated. The concentration of bagasse fibers ranges from 20 to 80 wt%. The results indicate that…
Streams are amongst the most sensitive ecosystems in Arctic regions to environmental change. Although diatoms are excellent indicators of environmental change, little information is available about stream diatom distributions across the vast Canadian High Arctic. We sampled 42 streams from nine islands in the Canadian…
The increasing resistivity of copper with scaling and demands for higher current density are the driving forces behind the ongoing investigation for new wiring solutions for deep nanometer scale VLSI technologies. Metallic carbon nanotubes (CNTs) are promising candidates that can potentially address the challenges fac…
Continued reduction of α-Si bolometer pixel size has led to increases in array size as well as improvements in temporal response for a given level of sensitivity. Programs funded by DARPA and NVESD are developing advanced 320×240, 640×480 and 1024×768 α-Si bolometer arrays with 17μm pixels, on-chip A/D conversion, sig…
High-surface-quality amorphous carbon (a-C) optical coatings with a thickness of 45 nm, deposited by magnetron sputtering on a silicon substrate, were irradiated by the focused beam of capillary-discharge Ne-like Ar extreme ultraviolet laser (CDL=capillary-discharge laser; XUV=extreme ultraviolet, i.e., wavelengths be…
Methods of synthesis of binuclear pivalate complexes L2Ln2(μ-O,η2-OOCCMe3)2(μ2-O,O′-OOCCMe3)2(η2-OOCCMe3)2, where Ln = Sm, Eu, Gd, or Er and L = 2,2′-dipyridyl (Bipy) or 1,10-phenanthroline (Phen), from the corresponding binuclear complexes Ln2(μ2-OOCCMe3)4(OOCCMe3)2(HOOCCMe3)6 · HOOCCMe3(I–IV), as well as of coordina…
Artistic view of the hexagonal lattice of graphene.Notice that the graphene lattice has two types of edges: zigzag (top and bottom edges) and armchair (right and left edges).Image obtained from: http://news.thomasnet.com
In this paper we describe the facile reversible UV-controlled and fast transition from emulsion to gel by using a photoresponsive polymer with a malachite green group. The photoresponsive polymer with the hydrophobic malachite green group can be used for the formation of an oil-in-water emulsion. However, upon UV irra…
Nanoparticles play key roles in reducing thermal conductivity, and hence increasing figure of merit for many thermoelectric materials. We have studied the structure of AgPb18SbTe20 (LAST-18) using high resolution imaging, nanoelectron diffraction, energy dispersive spectrum, and electron energy loss spectrum, and obse…
Nucleophilic aromatic substitution of bromine in 4-bromo-5-nitrophthalodinitrile with the morpholine residue and the subsequent substitution of nitro group with the aryloxy one yielded 4-morpholyl-5-aryloxyphthalodinitriles. From these substances octasubstituted copper phthalocyanines were synthesized, and their physi…