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。
Abstract The pyrolysis of polyvinyl chloride (PVC) was examined with a thermal gravimetric analyzer (TGA). The experiments were carried out over the temperature range of 400‐800 K at three heating rates of 1, 2, and 5.5 K/min and in a nitrogen atmosphere. The results indicate that the entire process of PVC pyrolysis u…
A profound analogy exists between the modulate structures in magnetic materials and in nematic liquid crystals, especially for the behavior in an external field. Starting from this point, we study the influence of an electric field on the spatially modulated spin structure (spin-density-wave state) of the magnetic fer…
Gallium is a metal that literally melts in your hand. It has low toxicity, near-zero vapor pressure, and a viscosity similar to water. Despite possessing a surface tension larger than any other liquid (near room temperature), gallium can form nonspherical ...Read More
Two coercivity models, a phenomenological model developed by Givord et al. and a micromagnetic model developed by Kronm\"uller et al., have been used to analyze the temperature dependence of the coercive field of sintered ${\mathrm{Pr}}_{17}$${\mathrm{Fe}}_{75}$${\mathrm{B}}_{8}$ and ${\mathrm{Pr}}_{17}$${\mathrm{Fe}}…
Porphycene photosensitizers bearing two or four methoxyethyl side chains were synthesized in nine steps from commercially available starting materials. Ether cleavage led to (hydroxyethyl)- and (bromoethyl)porphycenes that were converted to vinyl and benzo derivatives. Five of the side chain-functionalized porphycenes…
The concept of structure sensitivity is well established for reactions catalyzed by metals as it has been generally demonstrated by the use of supported metal catalysts exhibiting different particle size [l-71. The con-cept of structure sensitivity in catalysis by metal oxides is considerably less well developed than…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRhodium(II) Porphyrin Bimetalloradical Complexes: Preparation and Enhanced Reactivity with CH4 and H2Xiao-Xiang Zhang and Bradford B. WaylandCite this: J. Am. Chem. Soc. 1994, 116, 17, 7897–7898Publication Date (Print):August 1, 1994Publication History Published online1 May…
In recent experiments it was found that the Kapitza conductance between diamond and Pb at room temperature is as much as 100 times larger than predicted by the acoustic mismatch model. Because the diamond and Pb are in intimate contact, the phonon modes near the interface are joint vibrational modes, extending a phono…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicrobial Synthesis and Characterization of Poly(3-hydroxybutyrate-co-3-hydroxypropionate)Eihaku Shimamura, Mariastella Scandola, and Yoshiharu DoiCite this: Macromolecules 1994, 27, 16, 4429–4435Publication Date (Print):August 1, 1994Publication History Published online1 Ma…
Near-infrared surface-enhanced Raman scattering (NIR SERS) was detected with high sensitivity for two model compounds, crystal violet and the DNA base adenine, adsorbed on silver and gold colloidal particles in aqueous solutions. The NIR SERS spectra were measured with a fiber-optic probe with the use of a Ti:sapphire…
With rapid solidification following pulsed laser melting, we have measured the dependence on interface orientation of the amount of solute trapping of several group III, IV, and V elements (As, Ga, Ge, In, Sb, Sn) in Si. The aperiodic stepwise growth model of Goldman and Aziz accurately fits both the velocity and orie…
We report computer simulations which test the accuracy of the diffusion theories used in the analysis of multiple light scattering data. Explicitly including scattering anisotropy and boundary reflections, we find that the predicted probability for transmission through a slab is accurate to 1% if the slab thickness is…
Abstract The effect of modification of the central moiety of the dianhydride residue and isomerism on the gas transport and physical properties were compared for six polyimides containing the hexafluoroisopropylidene group in the diamine residue. Substitution of bulkier groups within the dianhydride residue resulted i…
There has been considerable interest and activity in Australia during recent years in providing ultraviolet radiation protection for the public and the work force. Many requests from the public and manufacturers have been received by the Australian Radiation Laboratory for the quantification of the protection provided…
An anomalous line narrowing along with the appearance of several new lines on cooling Bi4Ti3O12 ceramics, indicates a subtle phase transition in the 150–200 K region. In the same temperature range, anomalies in dielectric properties (dielectric constant, coercive field, and spontaneous polarization) of single-crystal…
[Extract] A general approach has been developed for the preparation of heteroleptic tris(bidentate)ruthenium(II) complexes which exhibit significant continuous light absorption throughout the UV and visible regions. It utilizes separate metal-to-ligand charge transfer (MLCT) transitions to different heterocyclic ligan…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSonochemical Destruction of Chlorinated C1 and C2 Volatile Organic Compounds in Dilute Aqueous SolutionAshish. Bhatnagar and H. Michael. CheungCite this: Environ. Sci. Technol. 1994, 28, 8, 1481–1486Publication Date (Print):August 1, 1994Publication History Published online1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTShape Transformations in the Lecithin-Bile Salt System: From Cylinders to VesiclesStefan U. Egelhaaf and Peter SchurtenbergerCite this: J. Phys. Chem. 1994, 98, 34, 8560–8573Publication Date (Print):August 1, 1994Publication History Published online1 May 2002Published inissu…
Recent structural studies of the undoped and iodine-doped polyacetylenes (prepared by the Tsukamoto and co-workers method), PF6−-doped polypyrrole and polyaniline emeraldine base and (hydrochloric acid and camphorsulfonic acid) salts are presented. Some key features of the polymer chain array and its evolution with th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTQuantitative Two-Dimensional EXSY Spectroscopy and Dynamic Behavior of a Paramagnetic Lanthanide Macrocyclic Chelate: YbDOTA(DOTA = 1,4,7,10-Tetraazacyclododecane-N,N',N'',N'''-tetraacetic Acid)Vincent Jacques and Jean F. DesreuxCite this: Inorg. Chem. 1994, 33, 18, 4048–405…