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。
We have prepared and characterized several lanthanide ion complexes of multidentate ligands or chelates in an effort to develop new upconverting luminescent labels that can be immune to autofluorescence and photobleaching. This study has involved the characterization of various chelates of Nd, Er, and Tm with respect…
Interest in the use of natural fibers as fillers has grown over the past few years due to the advantages it offers. The use of oil palm empty fruit bunch (EFB) as a filler in the unplasticized poly(vinyl chloride) (PVC-U) is a new attraction in polymer composite technology. The objectives of this study are to investig…
Theoretical analysis on the relationship of complex viscosity (η*) and steady shear viscosity (η) indicates that viscous viscosity (η′) measured under linear viscoelastic region equates with steady shear viscosity at low shear rates, and the Cox‐Merz Rule applies only to the suspension whose viscous viscosity of the s…
Abstract Blending ground rubber with thermoplastic and thermoset polymers is a very cost effective and efficient method for recycling rubber waste. However it is important for vulcanized rubber particles and the thermoplastic matrix to adhere to each other to form co-continuous type morphology to provide necessary str…
The influence of process atmosphere during sintering is an aspect of nanopowder processing that has not been widely investigated. Reducing the chemical potential of oxygen promotes the beginning of sintering in nanopowder particles of a model oxide material. The importance of oxygen vacancies is shown by both sinterin…
Ruthenium has been of interest for application in ULSI capacitor electrodes and more recently as a barrier metal against Cu diffusion. Thin-film deposition from supercritical CO 2 has gained particular attention as a new deposition technique that provides nano-penetration capability and a possibility of developing new…
Fouling is the deposition of milk solids on heat transfer surfaces, particularly heat exchangers. It is a major industrial problem, which causes a decrease in heat transfer efficiency and shortens run times. The resultant effect is a decrease in process efficiency and economy. For studying and monitoring deposit forma…
Abstract There has been a long-standing commercial desire for elastomers with a high degree of oil-resistance. For example, oil-resistant materials are very important to the automotive industry since a variety of components may come into contact with a number of fluids (hydrocarbon and otherwise). In the specific case…
Spin-polarized density functional theory calculations have been performed to characterize the hydrogen adsorption and diffusion on the Fe(111) surface at 2/3-, 1-, and 2-monolayer (ML) coverages. It is found that the most favored adsorption site for atomic hydrogen (H) is the top-shallow bridge site (tsb), followed by…
Abstract A weight loss technique was used to determine the corrosion inhibition efficiency of synthesized alkyl mono‐and dibenzoate triethanolammonium bromide derivatives (TEAMB, TEADB) in an acidic medium (2 N HCl) at different doses (50, 100, and 200 ppm). The results showed that monoderivatives had a higher corrosi…
A variable temperature colour measurement technique has been developed to characterise the temperature-dependent colour change, known as ‘colour play’, observed with thermochromic prints based on microencapsulated liquid crystals. The effect is most pronounced over a black background. The liquid crystals exhibiting th…
A molecular rectangle of the form ([Re(CO)(3)](2)BiBzIm)(2)-mu,mu'-(LL)(2), where BiBzIm is 2,2'-bisbenzimidazolate and LL are cofacially aligned [5,15-bis(4-ethynylpyridyl)-10,20-bis(n-hexyl)-porphyrinato]zinc ligands, has been examined via electrochemical, spectroelectrochemical, and electronic Stark effect methods.…
There are several micro sized thermal emitters commercially available, but compared with an ideal black body radiator, their emissivity and thus the emitted radiation is moderate. This was the motivation to develop a novel type of micromachined thermal IR-emitters. The main difference compared with common thermal micr…
Abstract : A survey of the planktonic diatom community was carried out during summer2003 in Lake El’gygytgyn, a deep, cold, low conductive and oligotrophic crater lake inthe Northeast Siberian Arctic. Five planktonic diatom species were identified: Cy-clostephanos dubius , Cyclotella ocellata , Cyclotella tripartita ,…
An electric-field method is developed for measuring the polar anchoring energy of vertically aligned nematic liquid-crystal cells. Both theoretical analyses and confirming experimental results are presented. Vertically aligned liquid-crystal cells with buffed polyimide alignment layers are used to investigate the meas…
Lattice strains in nanocrystalline cubic silicon nitride were measured using an energy-dispersive x-ray diffraction technique under nonhydrostatic stress conditions up to a confining pressure of $68\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$. The high-pressure elastic properties of $\ensuremath{\gamma}\text{\ensuremath{-…
Electro-optical properties and dielectric relaxation phenomenon have been investigated for antiferroelectric liquid-crystal mixture W-132A exhibiting SmA*, SmC*, and wide temperature range (∼0–48°C) induced SmCA* phases. Spontaneous polarization, tilt angle, response time, viscosity, relaxation frequency, dielectric s…
The relaxation processes in cellulose, methyl cellulose, hydroxypropyl cellulose, and hydroxypropylmethyl cellulose were studied by dielectric spectroscopy. The dielectric spectra for these polysaccharides were measured in the frequency range from 100 Hz to 1 MHz and in the temperature range from 100 to 450 K. The die…
The optical response of the lowest-energy isomers of the B20 family is calculated using time-dependent density-functional theory within a real-space, real-time scheme. Significant differences are found among the absorption spectra of the clusters studied. We show that these differences can be easily related to changes…
The aquasonolytic rate constants of cyclic C6H(X), aliphatic C6H(X), thioethers, thiophenes, and N-heterocyclic compounds show over a 90-fold variation under identical conditions of ultrasonic irradiations. Henry's Law constant of the substrate has a substantial effect on the aquasonolytic rate; a higher Henry's Law c…