Materials Literature
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We investigate the crystal structure and physical properties of 2,4- and 3,4-dihydroxybenzaldehyde-4-nitrophenylhydrazone (DHNPH) isomer crystals to understand the relation between molecular ordering with noncovalent interactions based on phenolic OH groups. The microscopic and macroscopic optical nonlinearities of 2,…
A large magnetoresistance is expected when half-metallic ferromagnets are used in magnetic tunneling junctions with polycrystalline AlOx barrier. We demonstrate by in situ tunneling microscopy how the atomically smooth morphology of Co2Cr0.6Fe0.4Al Heusler thin films results in unfavorable wetting properties of the Al…
We have found that a copper ion-exchanged MFI (Mobil Five)-type zeolite, having an ion exchange capacity of 112% (CuMFI-112), exhibits a specific interaction with CH 4, even at room temperature. The observed properties are very remarkable compared with those found in the adsorbed amount of sodium ion-exchanged MFI and…
We have studied spontaneous polarization, switching time and dielectric parameters (namely dielectric strength, relaxation frequency, distribution parameter) of a 5 µm thick planar oriented sample of a highly tilted anti-ferroelectric liquid crystal material (S)-(+)-(1-methylheptyloxycarbonyl) phenyl 4'-(6-perfluorope…
Research on down conversion phosphor materials is the key for the development of solid‐state lighting (SSL). Especially finding alternative red phosphor for white light emitting diodes (LEDs) based on blue or near ultraviolet (NUV) LEDs is important research task. In this view, we have synthesized a series of Eu 3+ ‐s…
Metal-ferroelectric-insulator-semiconductor capacitors and field effect transistors with Al/BiFeO3/Y2O3/Si structure were fabricated and characterized for nonvolatile memory applications. The capacitance-voltage curves exhibit a maximum clockwise memory window of 0.92 V. The minimum leakage current density is 2×10−7 A…
Microscale ratchet structured surfaces were coated with nanoparticles, which resulted in anisotropic behavior of superparamagnetic microdroplet by magnetic field actuation. This ratchet structure enables superparamagnetic microdroplets to generate the anisotropic behavior through the alternative external magnetic fiel…
Gelatin films were prepared by dissolving gelatin granules in hot distilled water (90°C) followed by casting. Tensile strength (TS), tensile modulus (TM) and elongation at break (Eb %) of the films were found to be 27.0 MPa, 100 MPa and 4%, respectively. Gelatin films were irradiated under Co-60 source at different do…
Adsorption of N2 at 77 K and scanning electron microscopy have been used to measure the changes in the support morphology, at nano- and microscale level, along the processes involved in the preparation of a supported Pd catalyst: Pd deposition, doping, and thermal treatments. Among the investigated supports, viz., act…
Metal-ferroelectric-insulator-semiconductor structures with a BiFeO3 ferroelectric layer and DyScO3 insulating buffer layer were fabricated and characterized. BiFeO3 film was polycrystalline with rhombohedral structure and DyScO3 film was amorphous. The size of the capacitance-voltage memory window (ΔVFB) was investig…
The authors investigate the performance and reliability of routing architectures in field programmable gate arrays (FPGA) that utilise bundles of single-walled carbon nanotubes (SWCNT) as wires in the FPGA interconnect fabric in future process technologies here. To leverage the performance advantages of nanotube-based…
Studies of the effect of inter-lamellar linkages on environmental stress cracking resistance (ESCR) of polyethylene have traditionally focused on changes in the amorphous phase. Since polyethylene is a semi-crystalline polymer, the crystalline phase also plays an important role in the mechanical behavior of the polyme…
Particle aggregation is implicated in a preparation of water-soluble functional nanoparticles and there is currently great interest in aggregation-free and water-soluble nanoparticles with a specific functionality. In this report, we present the aggregation-free surface modification process that provides water-soluble…
Abstract Photochromic compounds (1–6) are synthesized and characterized and the results of their spectra are presented. The structure–photochromic behavior relationship (SPBR) of the synthesized compounds has been analyzed. Copyright © 2009 John Wiley & Sons, Ltd.
Never-dried cellulose gel obtained by slow coagulation from LiCl/N,N-dimethylacetamide (DMAc) solution was exposed to an alternating current electric field. Making use of the birefringence of oriented cellulose and by means of wide-angle X-ray scattering, it was demonstrated that preferred orientation of cellulose mol…
The effect of excess iron-doping in piezoelectric lead-zirconate-titanate (PZT) on the microstructure was investigated by means of transmission electron microscopy in conjunction with electron diffraction and energy dispersive x-ray spectroscopy analysis. Electron paramagnetic resonance (EPR) spectroscopy has been use…
Bilayer graphene in a magnetic field supports eight zero-energy Landau levels, which, as a tunable band gap develops, split into two nearly degenerate quartets separated by the band gap. A close look is made into the properties of such an isolated quartet of pseudo-zero-mode levels at half filling in the presence of a…
Giant redox dendrimers were synthesized with pentamethylcobalticinium termini for the fifth, sixth, and seventh generations (in addition to the nine-arm generation 0) up to a theoretical number of 3 9 tethers (seventh generation, G 7 ). Therefore, a functional pentamethyl cobalticinium derivative was synthesized with…
Ce x Zr 1− x O 2 nanocrystals were prepared via a coprecipitation and subsequent solvothermal treatment. Temperature-programmed hydrogen reduction (H 2 -TPR) was applied to evaluate the reduction properties of the as-prepared materials. The oxygen storage capacities (OSC) of Ce x Zr 1− x O 2 nanocrystals with various…
Electrical transport properties of undoped polyaniline (Pani) and Pani doped with Fe, Ni and La ions (named Pani–Fe, Pani–Ni and Pani–La) have been investigated using dc and ac conductivity data. It is shown that the Pani–Fe sample follows 3D variable range hopping (VRH) conduction while the Pani, Pani–Ni and Pani–La…