Materials Literature
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We have shown in a previous study [S. Muto et al., Jpn. J. Appl. Phys., 44, 2061 (2005)] that a high hydrogen storage capacity in hydrogenated nanostructured graphite is partly ascribable to the formation of hydrogenated iron carbide particles. In the present study, we examined the effects of hydrogen on electron ener…
Recent experimental investigation showed that NiTi shape memory alloy microtubes exhibit deformation instability and complicated non-uniform strain evolution during combined tensile and torsional loading. In this paper, in situ profilometry is introduced to measure the non-uniform strain fields in the tube configurati…
Fabrication and intense infrared to blue upconversion emission of proton-implanted Tm3+, Nd3+:Y3Al5O12 (YAG) channel waveguides are reported for the first time to authors’ knowledge. The single or multiple implanted channels are buried by positive induced index change in stacked planar layers grown by liquid-phase epi…
Purpose Chromium based conversion coatings have been used widely to delay the formation of white rust on galvanized steel sheets. As chromium is carcinogenic, an alternative chromium‐free conversion coating was developed for use on galvanized steel surfaces to delay the onset of white rusting. This paper seeks to addr…
Optical and magnetic properties are studied on Rb and Cs clusters incorporated into the cages of aluminosilicate zeolite A (structure type code LTA), where α and β cages with inside diameters of ∼1.1 and ∼0.7 nm, respectively, are arrayed in a simple cubic structure. The average number of guest alkali atoms per α cage…
La Ni O 3 thin films have been deposited on SrTiO3 (100) by pulsed laser deposition. Substrate temperature and oxygen pressure have been investigated in the ranges of 640–840°C and 200–600μbars, respectively. The use of LaNiO3 as an electrode requires good electrical, structural, and morphological properties. Optimize…
NaxCuO2 (x approximately 1.6) has been synthesized for different compositions x, resulting in both commensurate and incommensurate composite crystals. The crystal structures are reported for two incommensurate compounds (x=1.58 and 1.62) determined by Rietveld refinements against X-ray powder diffraction data. The inc…
An experimental configuration is demonstrated that captures features of the initiation of unstable stress-induced transformation in a shape memory alloy (SMA). The apparatus uses circulating fluids through the grips and a heat sink and thermoelectric devices to control the temperature profile of a specimen within a me…
The role of the Sm 3+ ions in the structure of vitreous Sm 2 O 3 ·4P 2 O 5 has been investigated using the neutron diffraction anomalous dispersion technique, which employs the wavelength dependence of the real and imaginary parts of the neutron scattering length close to an absorption resonance. The data described he…
Ein kristallines Metalloxid, Mo3VOx (x ≤ 11.1), zeigt eine hervorragende katalytische Aktivität bei der selektiven Oxidation von Acrolein (siehe Bild). Der Katalysator wurde aus einer Lösung synthetisiert, die pentagonale Einheiten von {Mo(Mo5O27)} (blau) enthielt; diese reagierten weiter mit Molybdän- und Vanadiumspe…
The four electron-transfer complexes trans-(di(N,N-diethyl-(2-phenyldiazenyl)thioformamide-kappaS,kappaN2))nickel, trans-(di(N,N-diethyl-(2-phenyldiazenyl)thioformamide-kappaS,kappaN2))copper, trans-(di(N,N-diethyl-(2-phenyldiazenyl)thioformamide-kappaS,kappaN2))palladium and trans-(di(N,N-diethyl-(2-phenyldiazenyl)th…
Crystalline silicon single quantum wells (QWs) with a minimum Si layer thickness of around 1nm were fabricated by high temperature thermal oxidation of separation by implantation of oxygen (SIMOX) and epitaxial layer transfer (ELTRAN®) silicon-on-insulator (SOI) wafers. Not only Si thickness but also defect-free SOI m…
The authors have performed variable-temperature electrical measurements on individual single-crystalline, Mn-doped ZnO nanowires. Using a back-gated field-effect transistor structure fabricated with electron-beam lithography, they have established that nanowires exhibit n-type conduction. At a temperature of 225K, the…
Extraction of reliable bond distances and angles for Ca10(VxP1-xO4)6F2 apatites using standard Rietveld refinement with Cu Kalpha X-ray powder data was significantly impaired by large imprecision for the O-atom coordinates. An initial attempt to apply crystal-chemical Rietveld refinements to the same compounds was par…
Five different glass compositions with equal TeO2 molar concentration and various intermediate constituents were prepared to examine the influence of such intermediate species on the tellurite network. A correlation between the glasses’ structural network and optical properties is presented. Peak Raman gain coefficien…
Polymerizable liquid crystalline semiconductors, referred to as reactive mesogens (RMs), consist of π-conjugated cores with reactive end groups decoupled by an aliphatic spacer. These can be polymerized within the mesophase, maintaining the self-assembled morphology and charge transport characteristics. The polymerize…
Highly (111)- and (200)-oriented cubic BaTiO3 films with dense and hemispherelike morphology have been synthesized on different oriented TiN-coated silicon substrates in barium contained concentrated alkaline solutions at temperatures below 100°C. An unconventional hydrothermal technique combining a hydrothermal metho…
This study reports the low frequency magnetoelectric (ME) response of the sintered composites comprising of a piezoelectric phase Pb(Zr0.52Ti0.48)O3 (PZT) and magnetostrictive phases NiFe1.9Mn0.1O4 (NFM) and Ni0.8Zn0.2Fe2O4 (NZF) with varying ferrite contents of 3, 5, 10, 15, and 20mol%. It was found that the ME coeff…
Experimental investigations on superelastic shape-memory alloys (SMAs) show a dependence of the stress–strain relationship on the loading–unloading rate. This feature is of particular importance when utilizing SMA materials for seismic applications, since the loading rate may affect the structural response. Motivated…
Branched or encapsulating nanostructures with controlled architectures are produced using flow fluctuation in a vapor–liquid–solid process. The flow fluctuation induces catalyst coalescence or division (see figure). The technique is illustrated by the synthesis of iron-encapsulating carbon nanotubes with controlled en…