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。
Composite materials are a class of materials used in many diverse applications. Very recently the attention has shifted to the development of green composites that are easily recycleable and in this case the use of biodegradable matrices and fibres appear to be highly attractive. In the present study a class of biodeg…
We have investigated the electronic structure of Au(tmdt) 2 (tmdt = trimethylenetetrathiafulvalenedithiolate), which is a single-component conductor showing a magnetic phase transition around 100 K, by ab initio plane-wave pseudopotential calculations. A single band crosses the Fermi level. This band and the next band…
Research Article| March 01, 2005 Meteoritic Nanodiamonds: Messengers from the Stars Gary R. Huss Gary R. Huss 1Hawai'i Institute of Geophysics and Planetology University of Hawai'i at Manoa, USA E-mail: ghuss@high.hawaii.edu Search for other works by this author on: GSW Google Scholar Elements (2005) 1 (2): 97–100. ht…
Abstract The binding of a series of phosphate anions to coordinatively unsaturated macrocyclic complexes of Yb, Tm, and Eu was studied by 1 H‐NMR, emission and circularly polarized luminescence (CPL) spectroscopy. Each ternary adduct was distinguished by its spectral profile. With O ‐phosphorylated amino acids and pep…
International audience
Abstract Eu 3+ , Dy 3+ , and Yb 3+ complexes of the dota‐derived tetramide N , N′ , N″ , N′′′ ‐[1,4,7,10‐tetraazacyclododecane‐1,4,7,10‐tetrayltetrakis(1‐oxoethane‐2,1‐diyl)]tetrakis[glycine] (H 4 dotagl) are potential CEST contrast agents in MRI. In the [Ln(dotagl)] complexes, the Ln 3+ ion is in the cage formed by t…
The influence of rare earth (RE) additions on the microstructure and some properties of gold and gold alloys have been studied. RE additions can refine the grain size of gold alloys, but show a tendency to segregation, both dendritic segregation in cast alloys and grain boundary segregation in annealed alloys. For gol…
The present study explores the effects of exposure in a laboratory combustor on microstructural stability and property retention of an all‐oxide fiber‐reinforced ceramic composite. The material consists of a porous mullite–alumina matrix and Nextel 720 fibers in an eight‐harness satin weave. To assess the effects of m…
The reaction kinetics for the formation of CuInSe2 thin films from a stacked bilayer precursor consisting of InSe and CuSe was studied by means of in situ high-temperature x-ray diffraction. In particular, the isothermal phase evolution of the glass/InSe/CuSe precursor was observed at different temperatures. The pathw…
Experimental study of the hydrogen coverage of a nanoporous silicon-specific surface reveals a fractal nature of the surface of silicon nanocrystallites constituting the porous layer. A fractal model describing the nanocrystallite morphology is elaborated. The evolution of the nanocrystallites' fractal dimension $(2.1…
Summary Immersing commercial spent nuclear fuel (CSNF) in deionized water produced two corrosion products after a 2-year contact period. Suspensions of aggregates were observed to form at the air–water interface for each of five samples. These suspended aggregates were characterized by X-ray diffraction (XRD) to be me…
A new and simplified method of fabricating anodic aluminum oxide has been developed. This new method uses anodization but follows a route different from the commonly known 1- or 2-step anodization. General-purity (99.7%) commercial aluminum is used instead of the high-purity aluminum required in conventional anodizati…
Effects of Y 2 O 3 on the temperature stability of acceptor-doped BaTiO 3 dielectrics were studied. The sample doped with 1 mol% Y 2 O 3 exhibited the highest dielectric constant. A substantial reduction in grain size was observed in the specimen with 1 mol% Y 2 O 3 (∼0.6 µm), compared with the undoped specimen (∼1.5…
The synthesis of two galactose-terminated alkanethiols with the structural formula X-OC2H5NHCO(CH2)15SH (X = 2,3,4,6-tetra-O-methyl-beta-D-Gal or beta-D-Gal) is described. Single-component and mixed self-assembled monolayers (SAMs) of the methylated and nonmethylated compounds were prepared on gold and subsequently ch…
Abstract Polypyrrole films prepared from aromatic ester solutions of tetrabutylammonium tetrafluoroborate (TBABF4), tetrabutylammonium hexafluorophosphate (TBAPF6), tetrabutylammonium trifluoromethanesulfonate (TBACF3SO3), and tetrabutylammonium perchlorate (TBAClO4) exhibited large electrochemical strain (11.2–14.0%)…
Abstract Investigations on the activation of cellulose by mixed solutions of caustic soda and urea are reported. The structural effects of those solutions on various dissolving pulps are studied by 13 C‐CP/MAS‐NMR spectroscopy. In a series of steeping lyes, the concentration of NaOH was varied in a range from 0% to 8%…
The main mechanisms of formation of a spin gap in low-dimensional metaloxide compounds are reviewed. Among the objects in which a singlet ground state is formed are dimers, alternating chains with half-integer spin, uniform chains with integer spin, spin ladders, and two-dimensional ensembles of exchange-coupled spins…
Abstract To evaluate the potential of polyester‐based ionomers as biomaterials, we have characterized them in terms of crystallization behavior, degradation, and in‐vitro cellular interactions. The polymers used are poly(butylene succinate)‐based ionomers (PBSis) with 1 to 5 mol‐% dimethyl 5‐sodium sulfoisophthalate.…
This letter reports temperature-dependent recovery of atomic force microscope tip-formed indentations in a thermoset shape memory polymer. The indentations are made at both room temperature and 69°C, and then recovered at temperatures between 40°C and 70°C. The shape recovery is more complete for higher anneal tempera…
Membrane-based synthesis, also called template synthesis, is a very general approach used to prepare arrays of nanomaterials with monodispersed geometrical features. The most commonly used porous templates are track-etched polycarbonate and porous anodic alumina membranes. Common to all these templates is the fact tha…