Materials Literature
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Electrically conductive adhesive with isotropical electrical conductivity modified with addition of silver nanoparticles has been investigated. The electrical resistance, nonlinearity of a current vs. voltage characteristic and the tensile strength of adhesive joints formed of this adhesive have been measured. The spe…
A flexible program circuit for chalcogenide non-volatile memories was developed within a 4Mb ePCM (embedded phase change memory) implemented in 90 nm CMOS technology. The proposed architecture ensures adaptability with respect to process variations and is fully compatible with a single pulse approach or a multiple pul…
The paper focuses on a method to interface a power buffer based on supercapacitors (SCs) to a system with a stiff DC voltage. An optimized design methodology is given, showing that the proposed system is able to fully control the power flow between the SCs and the DC-link, making use of reduced-rating switching device…
We report the direct modification of SPIOs with a biomolecule, and the sequence-specific assembly of the modified SPIOs was achieved with the aptamer-small molecule interaction. In addition, the transverse relaxation rate of the aqueous solutions containing the modified SPIOs was altered by the dispersion state.
This paper presents a basic research on giant magnetostrictive actuator (GMA) for fuel injector. An injector is a pilot operational valve with position servomechanism, which enables to control injection rate freely with input current into the actuator. Based on the combination of finite element analysis and experiment…
The possibilities to manufacture gold-based foams are explored. Gold powder and various powdered alloying elements are mixed with a small volume fraction of a gas-releasing blowing agent. The blend is compacted to a dense precursor, which is then melted in a further step in order to trigger foam formation. We find tha…
The N–Ag codoped ZnO films are deposited on quartz glass substrates by ultrasonic spray pyrolysis technology. The results indicate that the p-type conductivity in ZnO films is greatly enhanced by the double acceptor codoping of N and Ag compared with that of Ag- and N-monodoped ZnO films, and the N–Ag codoped low-resi…
A process was proposed for the synthesis of ZnO/MgO nanocomposites from alcoholic solutions by means or the consecutive precipitation of coprecipitation of alcoholic solutions of zinc acetate and magnesium with an alkali solution followed by annealing in the range 400–500°C. X-ray powder diffraction showed crystalline…
The electrical degradation mechanisms of BaTiO3-based ceramics were investigated by measuring the dependence of leakage current on high electric fields. Before the degradation, the leakage current predominately obeyed Ohm’s law and Poole-Frenkel relation. As the degradation progressed, the Poole-Frenkel emission curre…
Highly (002)- or (200)-oriented BaTiO 3 thin films were successfully grown on a Si substrate with a MgO buffer layer by RF magnetron sputtering. The deposition parameters need to be stringently controlled in order to grow BaTiO 3 films with good crystallinity. The sputtering parameters such as substrate temperature, R…
Abstract Measurements are presented of the vapor pressure of supercooled water utilizing infrared spectroscopy, which enables unambiguous verification that the authors’ data correspond to the vapor pressure of liquid water, not a mixture of liquid water and ice. Values of the vapor pressure are in agreement with previ…
Hydrogen-containing Ta 2 O 5 (Ta 2 O 5 :H) thin films, which are considered to be candidates for proton-conducting solid electrolytes, were prepared by reactive sputtering in H 2 O atmosphere. The substrate temperature during sputter deposition was changed from -20 to 70 °C because the equilibrium vapor pressure of wa…
Effects of Pressure on Piezoelectric and Dielectric Responses of Relaxor Ferroelectric Solid Solution Pb(Mg1/3Nb2/3)O3–PbTiO3 Binary System Ceramics near a Morphotropic Phase Boundary Composition, Yasuda, Naohiko, Ozawa, Koichi, Rahaman, Md. M., Ohwa, Hidehiro, Yamashita, Yohachi, Iwata, Makoto, Ishibashi, Yoshihiro
The effect of the plasma pretreatment using a biased sample holder on amino group introduction onto a polyethylene (PE) surface is reported. Ar or N 2 plasma was used for the pretreatment and was followed by ammonia plasma treatment for 30 s. X-ray photoelectron spectroscopy (XPS) and chemical derivatization were used…
Focusing of an electromagnetic wave radiated by a point source and transmitted through a plane layer filled with a medium with negative refractive index is considered. An elementary electric Hertzian dipole located in the air (or vacuum) parallel to the boundaries of the layer is considered as a point source of radiat…
The structures and properties of some Schiff base compounds doped in organogels were investigated. It was found that although individual Schiff bases could not form organogels with organic solvents, they can gel by mixing with an organogelator, N,N′-bisoctadecyl-L-Boc-glutamic-diamide, which formed transparent organog…
High density boron carbide nanowires are grown by an improved carbon thermal reduction technique. Transmission electron microscopy and electron energy lose spectroscopy of the sample show that the synthesized nanowires are B 4 C with good crystallization. The field emission measurement for an individual boron nanowire…
Zinc oxide microcrystal tubes were prepared by using H 2 O 2 -activated Zn powder and active carbon as raw materials. The prepared samples were characterized by powder X-ray diffraction, scanning electron microscopy and fluorescence spectrophotometer. The results indicate that ZnO microcrystal has tubular structure wi…
Crystal field effects in rare-earth ferroborates R Fe 3 (BO 3 ) 4 with various rare-earth elements are studied theoretically. The rare-earth magnetoelastic interaction Hamiltonian is written in a multipole approximation. The field and temperature dependences of the multipole moments and strain susceptibilities of rare…
BaTiO 3 thin films were fabricated at 650 °C by single sintering using additive-free and diethanolamine (DEA)-modified alkoxide solutions. The BaTiO 3 thin films derived from the DEA-modified solution had a flat surface and an rms roughness below 2.5 nm. The grain size on Pt/Ti/SiO 2 /Si substrates single-sintered at…