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。
Large-scale nickel nanocones array are synthesized by a one-step electrodeposition method without any template. The size and apex angle of nanocone can be controlled by changing the current density and deposition time. The mechanism of the formation of nanocones array morphology has been discussed. This nanocones arra…
For the first time, a series of sodium potassium niobate solid solutions with compositions around the morphotropic phase boundary (MPB) are hydrothermally synthesized at 200 °C using a simple KOH and NaOH mixture with Nb2O5 as a precursor powder. Rietveld refinement of X-ray diffraction data indicated the presence of…
The highly distributed gas–liquid interface in “dry water” powder can be used to greatly increase the kinetics of a gas–liquid heterogeneous catalytic hydrogenation, in the absence of any applied mixing.
The direct synthesis of H2O2 has been successfully achieved at high-concentration and high selectivity on Pd-loaded sulfonic acid-functionalized silica using non-acidic solutions and a reaction temperature of 313 K.
We report a computational study of the self-assembly of end-tethered nanorods in a neat system (no solvent). We present morphological phase diagrams for low and moderate aspect ratio rods as a function of inverse temperature vs. relative tether fraction. Our simulations predict that the end-tethered rods self-assemble…
A green-emitting phosphor, Eu 2 + -activated KCaPO 4 , was synthesized by a conventional solid-state reaction. The phase formation was confirmed by X-ray powder diffraction measurements. The photoluminescence excitation and emission spectra, the temperature-dependent luminescence intensities (293–438 K), and decay cur…
Perovskite‐type nitrogen‐doped SrTiO 3 nanoparticles of 50–80 nm in diameter were successfully synthesized by the solvothermal of Ti, SrCl 2 ·6H 2 O, and hexamethylenetetramine in KOH aqueous solution. Nitrogen‐doped SrTiO 3 showed excellent photocatalytic activity under both UV and visible light irradiation, that is,…
Silkworms have played an important agricultural role in supporting Japan's modernization, and traditionally, Japan has led the world as a repository of silkworm bioresources. The silkworm is a small and highly domesticated insect, which is ideal as a laboratory tool, although it is a bioresource that is relatively inf…
This paper introduces an environmentally friendly material, bio-binder to be used as partial replacement and modifier for asphalt binder on highways and airport pavements. This new binder is produced from thermochemical conversion of swine manure. To maintain a sustainable development, the highway paving industry has…
Silks spun by spiders and insects are independently evolved proteinaceous biomaterials with fascinating physical properties attracting scientists from a wide range of disciplines using a wide range of analytical tools. Here we demonstrate the suitability of neutron small angle scattering (SANS) to investigate the morp…
The morphology and particle size of neodymium-doped ZnO hybrid nanoparticles were tailored through fabrication under mild hydrothermal conditions (T = 150-250 degrees C, P = autogeneous, t = 18 h) for the first time using two surface modifiers: caprylic acid and n-butylamine. Characterization of these nanoparticles wa…
The thermal expansion along the principal crystallographic axes of the (NH4)2WO2F4 and (NH4)2MoO2F4 oxyfluorides has been studied. The anomalous behavior of α i (T) due to the phase transitions has been revealed at T 1 = 271.4 K and T 2 ≈ 180 K for the molybdate and at T 1 = 201.5 K and T 2 ≈ 161 K for the tungstate.…
A hydroxylated poly(ether ether ketone) (HPEEK) derivative has been covalently grafted onto the surface of acid-treated single-walled carbon nanotubes (SWCNTs) following two different esterification approaches. The hydroxylation degree of the HPEEK and the extent of the grafting reactions were determined by thermograv…
本検討では、名古屋市内の構造物のコア試験体に対して、放射性炭素に関する分析を行い、コンクリートの中性化現象について考察を行った。その結果、コンクリートの中性化現象について14C濃度を評価した結果、表層で濃度が高く、内部で低くなる傾向が得られた。また、14C濃度の経年変化プロファイルを参照することで、建設年代の情報があれば、中性化の進行プロセスを推定できる可能性があることがわかった。また、14C濃度は、フェノールフタレインの呈色反応によって評価される中性化フロントよりもかなり奥まで高い数値を保持しており、この値は、材料由来か、あるいは深部までCO2が到達したことによると考えられた。
Porous lanthanide oxides were fabricated by a precursor-thermolysis method. The precursors were synthesized by a hydrothermal reaction with lanthanide (La, Ce, Pr and Nd) salts, sodium oxalate and asparagine (or glutamine). Under hydrothermal conditions asparagine and glutamine exhibited greatly different complexation…
We are presenting a combinatorial approach for the preparation of surface-adsorbed metal nanoparticles for investigation of biological phenomena. Metal nanoparticles, in particular noble metal nanoparticles, have become increasingly recognized for their importance in studies of biological systems. An intense near-fiel…
Quinazolin-4-one-3-yl-propan-2-one (2) was prepared by N-alkylation of Quinazolin-4(3H)one 1. The treatment of compound 2 with hydrazine hydrate yielded hydrazine derivative (3), which on condensation with variously substituted aryl aldehydes gave the corresponding hydrazones (4). Compound 3 on reaction with phenyl is…
During the irradiation of WO3 films d = 7–160 nm thick by light at λ = 320 nm (I = (1.5–7) × 1015 quantum cm−2 s−1), absorption band at λ = 850 nm appeared along with absorption band edge shift to shorter waves. The subsequent irradiation of samples at λ = 850 nm caused the disappearance of the longwave absorption ban…
We compare the kinetics of copper island growth in the kinetic regime in the presence and absence of anion adsorption and show that the growth exponents are inconsistent with a direct attachment model. In sulfate solution, anion adsorption leads to instantaneous nucleation, equal lateral and vertical growth exponents,…
The electrical and dielectric properties of a commercial ZnO-based varistor ceramics were measured in the process of 8/20 μs impulse current degradation up to 5000 times of impulses. The characteristics of U-I in the region of low current and the loss tangent were mainly investigated. It was found that the varistor vo…