Nanotubes in the Fast Lane
A core of concentric nanotubes could oscillate at gigahertz frequencies–faster than any other mechanical oscillator.
Materials Literature
文献浏览
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。
Dimensional and Elemental Analysis of Particulate Contaminations on Silicon Wafers
As the dimensions of semiconducting devices continue to shrink, microelectronic devices are becoming increasingly sensitive to micro-contamination on wafer surfaces. This investigation analyzes the particulate morphology, elemental composition and the particle sizes of wafer contaminants in the lithographic process ar…
Structural features of two distinct molecular complexes of copper(II) cationic porphyrin and deoxyribonucleotides
The associations of the water-soluble cationic copper(II)-5,10,15,20-meso-tetrakis(4-N-methylpyridyl) porphyrin (CuP) with d(pT)9 oligothymidylate and its building blocks deoxythymidine (dT) and deoxythymidine 5'-monophosphate (dTMP) were investigated by spectrophotometric titration [absorption, nanosecond transient r…
Behavior of Impurities In and Cd in the LiNbO<SUB>3</SUB>-LiTaO<SUB>3</SUB> System
The temperature dependences of the nuclear-electric-quadrupole frequency ωQ of 117In and 111Cd doped in ferroelectrics LiTaO3, Li1−xInx⁄3TaO3 with x=0.2, and Li1−xCdx⁄2TaO3 with x=0.167, measured by the perturbed-angular-correlation technique, indicate that In behaves like Li; further, in a certain temperature range a…
Influence of Ion-Irradiation on Hardness Change in Type 304 Stainless Steel Weldment Containing Delta(δ) Ferrite
Differences of high energy-ion induced microstructure of bcc δ-ferrite and fcc austenite matrix, and the effects of δ-ferrite on the Vickers micro-hardness (Hv) after irradiation were investigated for Type 304 stainless steel weldments containing two different δ-ferrite contents: ferrite number (FN) 5.5 and 8.5, respe…
Long-Term Thermal Resistance of Polyisocyanurate Foam Insulation with Impermeable Facers
Polyisocyanurate (polyiso) foam insulation with impermeable facers is known for its superior insulating properties in building envelope applications. The impermeable facer on both sides of polyiso foam insulation board is designed to increase and maintain the long-term thermal resistance (LTTR) of the insulation. Curr…
Drowning-out Crystallization of L-Ornithine-Aspartate in Turbulent Agitated Reactor.
When L-ornithin-aspartate was crystallized by drowning-out method in a turbulent agitated semi-batch reactor, the effects of the crystallization conditions, such as the feed concentration, alcohol flow rate, and agitation speed, on the agglomeration and breakage of the L-ornithine-aspartate particles were investigated…
Isothermal decomposition of γ-irradiated dysprosium acetate
Isothermal decomposition of un-irradiated and pre- n -irradiated dysprosium acetate [Dy(CH3COO)3] has been investigated at different temperatures between 603-623 v K. Irradiation was observed to enhance the rate of decomposition without modifying the mechanism of the thermal decomposition. Thermal decomposition of dys…
Novel Mixed-Valence μ-Oxo-Bridged Trinuclear Manganese Complexes [Mn3O(O2CR)6L3] (R=4-Cl-C6H4OCH2, 3-Cl-C6H5, BrCH2, L=3-Methylpyridine or Water): Structures and Magnetic Properties
Preparation of three new mixed-valence oxo-centered trinuclear manganese complexes [Mn3O(O2CR)6L3] (R=4-Cl-C6H4OCH2, 1, 3-Cl-C6H5, 2, BrCH2, 3; L=3-methylpyridine or water), by reaction of N-n-Bu4MnO4 with appropriate reagents in ethanol and 3-methelpyridine is reported. The crystal structure of 1 has shown to have an…
Characterization of electrochemically deposited polyaniline–polypyrrole blend coatings on carbon fibers
Macroscopically homogeneous and uniform coatings of polyaniline, polypyrrole and their blend were successfully deposited on carbon fibers by aqueous electropolymerization technique. Electrochemical polymerization of aniline and pyrrole blend with p-toluene sulfonic acid as the electrolyte was carried out by cyclic vol…
Nickel in Structural Alloys
This review was prepared for presentation at the 13th Canadian Materials Science Conference held June 5 to 8, 2001 in Sudbury, Ontario – the heart of nickel production in Canada. Nickel has a wide application in structural and special purpose alloys such as stainless steels, superalloys and low alloy steels. The wide…
The First-Order Raman Spectra and Lattice Dynamics for CdWO4 Crystal.
The first-order Raman spectra of CdWO4 crystal are measured at room temperature. The phonon disper-sion curves of CdWO4 are calculated on the basis of a rigid-ion model using the measured frequency values. The first-order Raman spectra of external Ag mode (310cm-1 and 550cm-1) in the CdWO4 crystal have been measured i…
Synthesis, structures and physical properties of the cation radical salts based on tempo radical containing electron donors
We have synthesized new electron donors in which one or two TEMPO radical parts connect to the TTF skeleton through a 1,3-dithiol-2-ylidene ring to prevent the steric hindrance of the bulky TEMPO radical for the purpose of the realization of metallic conductivity. Furthermore crystal structure and physical properties…
THE SELECTIVE DEHYDROXYLATION OF 20-HYDROXYECDYSONE BY Zn POWDER AND ANHYDROUS ACETIC ACID
14-α-Deoxyecdysteroids were obtained in an isolated yield of 50% by the one step reduction of 20-hydroxyecdysone with activated Zn powder in anhydrous acetic acid at 65–70°C. About 24% isolated yields of the 14-β-deoxyecdysteroid were also obtained.
Effects of Suspension Density on Crystal Growth Rate in Multiparticle Agitated Crystallizers.
The single crystal growth rates (primary growth rate Gprim) and the average growth rates of crystalline multiparticles (secondary growth rate Gsec) determined by using a continuous MSMPR crystallizer were measured for a few inorganic systems. The influence of the suspension density MT on the average growth rate of the…
Cation Radical Salts with Flexible Polycyano Anions having Tetracyanoallyl Skeleton
Cation radical salts of BEDO-TTF (BO) with six kinds of polycyano counter anions of tetracyanoallyl derivatives (R-TCA; R: substituent) were investigated. Although the stoichiometries of the salts are different from salt to salt, the degree of charge transfer on BO molecules ranges from +0.4 to +0,5. 2-propoxy-TCA ani…
Analysis of Molecular or Ion Mobility in Glassy and Rubbery Foods by Electric and Proton-NMR Measurements
The glass transition temperature Tg for many foods has been determined by thermal analysis such as differential scanning calorimetry (DSC). The thermal analysis, however, does not provide information on molecular mobility. In this review, the analysis of the glass transition of foods by electrical methods and proton-N…
Preparation and optical absorption of colloidal dispersion of Au/Cu nanoparticles
Colloidal dispersions of Au/Cu nanoparticles are synthesized by the simultaneous reduction technique from their corresponding metallic ions in presence of poly(N-vinil-2-pirrolidone). The UV-VIS optical absorption spectra of alloy nanoparticles prepared with different Au/Cu molar ratio revealed that the colloidal disp…
Hydrolysis Characteristics of Biodegradable Plastic(Poly Lactic Acid).
PLAの一次分解特性を解明するため,コンポスト化の発現し得る温度とpH範囲を考慮し,PLAの加水分解試験を行った.本研究での設定pH範囲において,高温試験区ほど加水分解による一次分解が促進され,分子量低下が著しかった.またpH 6.0～8.0間では,pHの違いが低分子化へ及ぼす影響は小さく,重量減も認められなかった.他方pH 9.0の高アルカリ領域では,早い段階から大幅な重量減少が認められた.また,試料断面の観察結果からPLAの加水分解は試料の表面から進行することが確認された.以上の知見から,コンポスト化過程でのダイナミックな温度,pH変化がPLAの一次分解を促進し,続く完全生分解を容易にすることが確かめられ,この特性が,実用分解…
Electric Field and Voltage Distributions along Non-ceramic Insulators
High voltage insulators are essential for the reliable performance of electric power systems.All insulators, regardless o f their material, are exposed to various electrical, mechanical and environmental stresses.The electrical stresses are the consequences of regular voltages and overvoltages.The mechanical stresses…