Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The quartz crystal microbalance (QCM) method was used to obtain precise information about the dissolution behavior of resist polymers. The time evolutions of the resonance frequency and the impedance during the dissolution were measured using the QCM method. The data were simulated using the transmission line method o…
Polyhedral Oligomeric Silsesquioxane (POSS) derivatives have been investigated as potential candidates for high resolution resists. POSS materials are cage compounds with defined mono-disperse molecular weights. These materials are attractive candidates for molecular resist development because of their commercial avai…
A generalised treatment of the appearance of supersaturation barriers σd, σ* and σ** during the growth of single crystals is outlined from the standpoint of well-defined critical values of relative step velocities on a face. The final theoretical expressions are based on the premise that: (1) there are critical values…
Abstract The performance of H‐ZSM‐5‐supported bimetallic catalysts with chromium as the base metal in the combustion of ethyl acetate and benzene is reported. A reactor operated from 100 to 500 °C at a gas hourly space velocity (GHSV) of 32 000 h −1 was used for study of the activity. A combination of 1.0 wt% chromium…
We have demonstrated the usefulness of employing a thermal-image furnace for in situ , high-temperature studies of oxide ceramics in air. Using Rietveld refinements lattice parameters and expansion coefficients can be measured up to 2000 °C in air. The use of an in situ temperature reference material is essential to m…
The single-phase Ba1-xEuxTiO3 (0.1≤x≤0.4) samples have been synthesized by solid state reaction under high pressure and -temperature. X-ray powder diffraction data was determined by MS Modeling using Reflex Powder Indexing technique. The Ba1-xEuxTiO3 series exhibited an interesting orthorhombic-tetragonal-cubic struct…
Single-phase thin films of NaxCoO2 have been grown epitaxially by pulsed-laser deposition technique. The growth conditions were studied based on the logpO2−1∕T phase diagram of Co–O2 using different types of substrate materials. For Na0.58CoO2, metallic behavior is found down to 4.2K. At the request of the authors, th…
As a part of our systematic study of phase transitions in liquid crystal dimers we report here the variation of density across the phase transitions Isotropic – Smectic A and Smectic A – Smectic F exhibited by the Schiff base liquid crystal dimeric compounds of α,ω-bis(4-alkylanilinebenzylidene-4′-oxy)alkane (m.OnO.m)…
Abstract The kinetics of ascorbic acid degradation in drumstick ( Moringa olifera ) leaves as well as in pure ascorbic acid solutions at the initial concentrations present in drumstick leaves over a temperature range of 50–120 °C (isothermal temperature process) has been studied. The degradation kinetics of ascorbic a…
Simulations of the formation and structure of colloidal crystal ordering that emerge from phase-separation–phase-ordering–texture processes driven by thermal quenches of an isotropic phase of polymer–rigid-rod mesogens are presented and characterized using spinodal-decomposition measures and liquid-crystal defect phys…
Carbon nanotubes were synthesized by chemical reduction of magnesium carbonate with metallic lithium at 600 degrees C. The nanotubes with an average length of 13 microm and diameter of 60 nm are made of short coaxial conical cylinder tubular graphite sheets with their cone axis parallel to the tube axis, different fro…
The oxidative electrodeposition of NiTSPP (tetrakis(4-sulfonatophenyl) Ni porphyrin) on ITO electrode from 0.1 M NaOH aqueous solution has been studied, and UV-visible and reflection FTIR spectroscopies have been used to analyze the composition of such film. By use of UV-vis spectroscopy, small absorbance of the film…
We show that the helical superstructure in chiral smectic-C-type liquid crystal phases can, if the pitch is short enough, give rise to the tristate switching characteristic of antiferroelectrics even if the local commensurate order is synpolar as in the ordinary Sm-C* phase. Since the field-induced helix unwinding exh…
An impurity-driven magnetic phase transition has been investigated in LaCoO 3 at temperatures below that of the thermally induced spin state transition of the Co 3+ ion. We have discovered a saturating component of the magnetisation, which we attribute to previously unobserved interactions between magnetic excitons. T…
ArF immersion lithography is considered as the most promising next generation technology which enables to a 45 nm node device manufacturing and below. Not only depth of focus enlargement, immersion lithography enables to use hyper numerical aperture (NA) larger than 1.0 and achieve higher resolution capability. For 19…
The aim of this communication is to probe the possibility of increasing the barrier for reversal of magnetization in the family of new cyano-bridged pentanuclear Mn(III)2Mn(II)3 clusters in which single molecule magnet behavior has been recently discovered. In this context, we analyze the global magnetic anisotropy ar…
We present a detailed study of the anisotropic optical properties of mesoporous silicon layers prepared from substrates having different doping levels under various preparation conditions. We demonstrate that the morphology of the layers strongly depends on the preparation conditions. It correlates with measured optic…
The photocatalytic oxidation (PCO) of trace amounts of propane (500 ppm) on nanocrystalline anatase TiO2 has been investigated in situ as a function of temperature (T = 318-473 K), humidity (C(H2O) = 0-4%), and time by means of mass spectrometry and diffuse reflectance Fourier transform infrared spectroscopy (DRIFT).…
Intercalated and exfoliated models of polymer nanocomposites based on poly(epsilon-caprolactone) and functionalized montmorillonite clay are studied by means of molecular dynamics simulations. Intercalated and exfoliated models are considered for probing the structural characteristics of the corresponding nanocomposit…
Zinc porphyrin-appended dendrimers, 12PZn, 18PZn, 24PZn, and 36PZn, containing 12, 18, 24, and 36 zinc porphyrin units, respectively, were synthesized using zinc porphyrin dyad (2PZn) and triad (3PZn) as precursors. Although these dye-functionalized dendrimers all serve as chiroptical sensors for an asymmetric bipyrid…