Materials Literature
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Cryosurgery is a minimally invasive clinical technique with controlled destruction of target tissues through a specifically administrated freezing procedure. This method has now been used in a wide variety of clinical situations such as treatment of skin cancers, glaucoma, lung and prostate tumor etc. However, there s…
We report the use of chiral bis‐chelated imine‐alkoxytitanium complexes as dopants for the conversion of a nematic into a cholesteric phase. High helical twisting power (HTP) is obtained in the liquid crystalline mixture ZLI‐1695 (Merck, Darmstadt). Enlargement of the HTP is achieved by novel analogues of the titanium…
Photolysis of cyclic disulfides in the presence of diamond films led to a surface modification that introduced thioalkylthiol functional groups, as confirmed by Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (TOF-SIMS). The S/C ratio of sulfur-modified dia…
Density functional, multireference configuration interaction, and modified valence configuration interaction calculations are used to investigate the electronic structure and spin coupling of the dinuclear [Fe(2)(hpdta)(H(2)O)(3)Cl] complex (H(5)hpdta = Hydroxypropane-1,3-diamine-N,N,N',N'-tetraacetic acid). The densi…
We reported photochromism and largely enhanced visible two-photon luminescence (TPL) of Ag-TiO(2) granular composite films by using ps/fs laser at the wavelength of 800 nm. Three types of photochromism spectra were observed when the Ag atom fraction are less than, comparable to and larger than the percolation threshol…
Effect of melt flow on the solidified structure of middle carbon steel was examined by a levitation method using alternating and static magnetic fields. In this study, solidification in the lower undercooling region (less than 70 K) was studied. As the static magnetic field increased, the melt flow in the levitated me…
Fundamental mechanisms of the pultrusion process using commingled yarns of polypropylene matrix and discontinuous flax fiber to produce thermoplastic profiles were investigated in numerical and experimental manners. Essential issue is the fact that all natural fibers are discontinuous by nature, which may negatively i…
Nanocrystalline silicon particles with grains smaller than 5 nm are widely recognized as a key material in optoelectronic devices, lithium battery electrodes, and bio-medical labels. Another important characteristic is that silicon is an environmentally safe material that is used in numerous silicon technologies. To d…
In recent years, power generating systems using thermoelectric elements have become attractive as an effective method of using industrial waste heat, at a temperature of around 773K, to produce energy. However, in order to develop a module usable under such a high temperature, certain concerns have to be overcome, e.g…
Artificial electron donors such as leuco methylene blue and leuco safranin O reduce nitrite ion to nitric oxide. The reaction is effected in a U-tube where nitrite ion and dye in two aqueous layers are separated by a layer of dichloromethane (a close model for a biological liquid membrane) that contains the platinum c…
This article takes into consideration some constructive parameters of needled nonwoven fabrics used as padding in winter clothes, and their influence on thermal resistance R ct and water vapor resistance R et . The nonwoven fabric features taken into consideration were the following: substance fibers, their average li…
Boron nitride (BN) nanotubes, nanohorns, nanocoils were synthesized by annealing Fe4N and B powders at 1000°C in nitrogen gas atmosphere. Especially, Fe-filled BN nanotubes, bamboo-type and cup-stacked type BN nanotubes were produced. Formation mechanism and nanostructures were investigated by high-resolution electron…
Corrosion tests of CrN-coated steels were conducted in liquid lead-bismuth (Pb-Bi) at 450°C and 550°C for 3000 h to investigate the applicability of CrN coating to a liquid Pb-Bi environment. CrN coatings on F82H (Fe-8Cr-2W-0.3V-0.04Ta-0.1C) and 316SS exhibited good compatibility in liquid Pb-Bi during corrosion test…
種々の鎖長の Rf 基を有するフルオロアルキルアクリレートポリマー[以下 PFA-Cy(y は Rf 基炭素数)と略]を合成し，表面分子鎖凝集構造と表面物性の鎖長依存性を静的，動的接触角，X 線光電子分光(XPS)，示差走査熱量分析，視射角入射 X 線回折(GIXD)測定などにより評価し，その撥水性発現機構を明らかにした．動的接触角測定において，後退接触角は炭素数 6 までは非常に低く，炭素数 8 以上で急激に増加した．GIXD 測定から炭素数 8 以上で Rf 基が秩序構造を形成すること，後退接触角は表面の環境応答性の指針となることから，以下の PFA-Cy 撥水性発現機構が提案される．すなわち，Rf 基の炭素数 8 以上では側…
The yield strength and electrical conductivity of precipitation-hardenable Cu-2.05mass%Ni-0.35mass%Be and Cu-1.27mass%Ni-0.22mass%Be alloys aged at 360 to 560°C after cold rolling have been investigated. The former alloy exhibits a higher strength and a lower electrical conductivity in the under-aging and peak-aging s…
We report a new cationic poly(phenylene ethynylene) (PPE) derivative that exhibits strong amplified fluorescence quenching in the presence of electron-deficient species, yielding high Stern-Volmer coefficients of 4.7 × 10 M in aqueous solutions. Importantly, with the addition of appropriate non-ionic surfactants, the…
Analyses of small-angle X-ray scattering (SAXS) and X-ray absorption fine structure (XAFS) were performed for characterizing precipitates formed in a Cu-3.1 at %Ni-1.4 at%Si alloy, the strength and electrical conductivity of which were improved by aging. SAXS profiles and XAFS spectra of samples aged at 720 K for diff…
The structural stability of A N B 8- N compounds such as GaAs, GaN, and NaCl is systematically investigated using our simple criterion on the basis of the ionicity, bond charge, and ionic charge of the A N B 8- N compounds. The criterion implies that the wurtzite structure is more stable than the zinc blende structure…
Mixtures of Pt clusters dispersed on gamma-Al(2)O(3) and additional gamma-Al(2)O(3) led to much higher DME combustion turnover rates than on the individual components or on Pt clusters supported on non-acidic oxides.
Cold plasma in the nanotechnology of catalysts In the paper the preparation of catalysts with the use of cold plasmas is discussed. A special attention is focused on nanocatalysts. In general, there are three main trends in this field: (1) plasma enhanced preparation of "classical" catalysts, (2) plasma sputtering of…