Heteroepitaxial growth of 3C–SiC on (110) Si substrates by chemical vapor deposition was carried out, and the grown epitaxial layers were investigated high resolution transmission electron microscopic (HRTEM) analysis. The interface structure between depended flow rate C3H8 during carbonization process. In case under C3H8=0.4 sccm, flat layer epitaxially substrate in a well-lattice-matched relationship Si//(111) [1̄10] Si//[1̄10] 3C–SiC. contrast, rough C3H8=1.2 sccm polycrystalline grew...

Abstract Tetrapod-like ZnO particles having four legs shorter than a micrometre have been observed by transmission electron microscopy and diffractometry. The are composed of six or more wurtzite-type elements. Four them make others form (1122) twins with the legs. Particles only also to three (1124) among them. We propose growth model that tetrapod-like particle grows from multiple induced in zincblende-type nucleus, taking account combination slips caused at phase transformation.

We report measurements of the de Haas-van Alphen effect in ZrZn2 under hydrostatic pressures up to 21 kbar where Curie temperature vanishes. The exchange splitting a Fermi surface changes behavior with increasing magnetic field, which is qualitatively consistent high-field magnetization, suggesting existence crossover between two distinct states. These and previously unexplained findings may be understood terms p-T-B phase diagram similar that ferromagnetic superconductor UGe2.

Ninety-two gastroepiploic artery (GEA) and 322 internal thoracic (ITA) grafts which underwent postoperative angiography (0.5-24 months, mean 2.0 months) were compared. The sites of GEA anastomosis 5 left anterior descending, 3 diagonal, 16 circumflex 68 right coronary arteries for ITA grafts, 241 40 36 arteries. Patency rates 96% (88/92) 98% (314/322) ITA, respectively. No focal stenosis in the graft trunk was found both except occasional spasm GEA. Six (6%) GEAs opacified via superior...

We discuss the merits of using group signature technology in Identity Management. propose a novel model scheme and introduce new entity called User-Revocation manager. manager plays an independent role regarding user revocation which was previously covered by either Group or Issuing extend idea Camenisch-Groth present efficient where cost is smaller than that scheme. also details our implementation.

Nanometre-sized ZnO crystals doped with Co were synthesized by a co-precipitation method combined thermal treatment. By changing the reaction temperature, we can control crystallite size from roughly 10 nm particles to 20 × 200 rods grown along hexagonal c-direction. X-ray diffraction and Raman scattering showed growth of high-quality wurtzite incorporating systematically in host lattice tested range [Co]<3.0 mol%. Electronic transitions oxygen tetrahedron also observed optical absorption,...

BiFeO 3 is a multiferroic material showing antiferromagnetic ordering and ferroelectric behavior simultaneously.Here, Mn-doped nanoparticles were synthesized up to 10% of Mn composition by sol-gel process.The samples showed high crystallinity with no secondary phase 2% doping.A phonon peak at 1250 cm -1 in undoped anomalous intensity enhancement the magnetically ordered below T N = 643 K due spin-phonon coupling.This was less pronounced samples, suggesting suppression magnetic between Fe 3+...

Zn(1-x)Co(x)O samples were prepared by a standard solid-state reaction method. crystals in the wurtzite structure obtained with Co composition of up to 22.1%. The a- and c-axis lengths increased decreased, respectively, an increase composition. Raman spectra showed systematic broadening E(2) (high) phonon mode associated composition, electronic transitions oxygen tetrahedron observed optical absorption measurement. These results indicated substitution into Zn sites. Furthermore, additional...

The purpose of the current study is to evaluate patients' entrance skin dose (ESD) during cardiac resynchronization therapy (CRT). Entrance doses were assessed 16 CRT procedures. Seven patients upgrade conventional pacemaker CRT. wore jackets which had 100 radiosensitive indicators placed on back After procedure, ESDs calculated from colour difference indicators. Eleven implanted devices with a defibrillator, and three those without defibrillator. In other two, procedures failed. average...

The aim of this study was to clarify an influence the fine structure human tooth enamel yellowing teeth.Sound maxillary first premolars 15-50-year-old females that were extracted for orthodontic treatment used as test samples. sections these teeth prepared by ion polishing observed scanning electron microscopy (SEM). Furthermore, substance filling inter-rod spaces analyzed high resolution transmission (HRTEM).In white tooth, at width about 0.1 μm, while in yellow not clearly SEM. HRTEM...

To determine alpha 1-adrenergic receptor responsiveness of the renal vasculature in normotensive Wistar-Kyoto (WKY) and spontaneously hypertensive rats (SHR), phenylephrine (2.5 or 5.0 micrograms.kg-1.min-1 iv) saline was infused. Effective blood flow (ERBF) glomerular filtration rate were determined by p-aminohippuric acid inulin clearances, respectively. Peritubular capillary, proximal tubular, stop-flow pressures (SFP) measured micropuncture. Phenylephrine decreased ERBF (6.27 +/- 0.48 to...

We report the de Haas–van Alphen (dHvA) effect measurements of Fermi surface properties in LaB 6 , Ce x La 1- B ( = 0.1, 0.25, 0.5, 0.75, 1.0) and Pr with particular attention to spin dependence properties. The shape dimension change considerably concentration, while those very slightly up PrB splits into down surfaces. effective mass increases concentration is nearly proportional number ions, whereas that concentration. In depends strongly on field divergently decreasing field, field....

Single-walled carbon nanotubes (SWCNTs)were grown on Si∕SiO2 substrates by catalytic chemical vapor deposition using ethanol as a source. We found that bimetallic catalyst, Fe–Co, worked efficiently in growing SWCNTs contrast to Fe or Co catalyst only. The underlying mechanism was carefully studied observing the catalyst-substrate interactions transmission electron microscopy. It is shown preferential diffusion of into SiO2 layer occurs case, which suppresses aggregation nanometer- sized...

We report unusual evolution of the conduction-electron state in localized $f$ electron system ${\mathrm{Ce}}_{x}{\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{B}}_{6}$ from normal to heavy Fermi liquid (FL) through local FL and non-FL states with increasing Ce concentration and/or magnetic field. The effective mass quasiparticle or coefficient $A$ ${T}^{2}$ term resistivity is found increase divergently near boundary between state. features are also different those typical systems previously...

TiO(2) nanocrystals were synthesized by a hydrolysis method combined with thermal treatment. rutile and anatase structure selectively controlling the pH level in precursor solution, crystallite size was controlled changing reaction temperature. Moreover, Co-doped also means of addition Co to solution. Secondary phases such as precipitates oxide not present sample tested, [Co]<10 mol%. With an increase doping level, E(g)-phonon signal at 447 cm(-1) broadened shifted lower frequency,...