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。
The fabrication of magnetic composite core−shell particles and hollow spheres with tailored dimensions and compositions has been accomplished by a multistep (layer-by-layer) strategy. Composite particles were prepared by coating submicrometer-sized anionic polystyrene (PS) latices with magnetite (Fe 3 O 4 ) nanopartic…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTFormation of High-Quality CdTe, CdSe, and CdS Nanocrystals Using CdO as PrecursorZ. Adam Peng and Xiaogang PengView Author Information Department of Chemistry and Biochemistry University of Arkansas, Fayetteville, Arkansas 72701 Cite this: J. Am. Chem. Soc. 2001, 123,…
Variable-temperature synchrotron x-ray powder diffraction data from dehydrated Na6[Al6Si6O24] reveal a structural phase transition that involves both the commensurate ordering of the extra-framework Na cations and a one-dimensional incommensurate modulation of the framework. Peak splittings and superlattice reflection…
Polypropylene hollow fibers were produced via the spunbonding process. Nitrogen gas was used as the lumen fluid. The polypropylene continuity equation can be combined with the nitrogen continuity equation to give excellent predictions of the inside diameter and the outside diameter of the product fiber. Tests were dev…
We have reported previously on the expression of recombinant human type X collagen (hrColX) in HEK 293 and HT 1080 cells by using the eukaryotic expression vector pCMVsis (in which CMV stands for cytomegalovirus). Several stably transfected clones secreted full-length triple-helical hrColX molecules in large amounts,…
A method is presented for modeling the geometrical packing of polydisperse mixtures of both spherical and nonspherical particles, which are models for filler particles used in the manufacture of polymer composites. The technique is based on the calculation of the dissipative dynamics of an ensemble of fused soft spher…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTA Solution Low-Temperature Route to MoS2 FiberHongwei LiaoHongwei LiaoDepartment of Chemistry and Structure Research Laboratory, University of Science & Technology of China, Hefei, Anhui 230026, Peoples' Republic of China More by Hongwei Liao, Yanfei WangYanfei WangDep…
The giant optical nonlinearity associated with photoinduced molecular reorientation of dye-doped nematic liquid crystals has been measured for a homologous set of dyes belonging to the anthraquinone family, dissolved both in a polar and in a nonpolar liquid crystal host. We found a strong sensitivity of the nonlineari…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTThe Formation of Dimensionally Ordered Silicon Nanowires within Mesoporous SilicaNicholas R. B. Coleman, M. A. Morris, Trevor R. Spalding, and Justin D. HolmesView Author Information Department of Chemistry and Supercritical Fluid Centre University College Cork, Cork,…
The demixing of a 0.002 wt % solution of a poly(ε-caprolactone) chain ( M w = 20 000; M w / M n = 1.07), labeled at both chain ends with pyrene, in tetrahydrofuran (THF) was studied using fluorescence. The very diluted region of the phase diagram of small polymer chains was explored for the first time. The coexistence…
A series of ternary and quaternary R-phase compounds in the Li-Mg-Zn-Al system are synthesized from pure elements in sealed Ta tubes with starting compositions based on the suggestions from electronic structure calculations using relative Mulliken populations to quantify the site preferences for the various elements.…
A series of new poly(arylene ether 1,3,4-oxadiazole)s has been prepared by nucleophilic displacement of aromatic dihalides with aromatic potassium bisphenates in diphenyl sulfone at elevated temperatures. The polymers, characterized by elemental and infrared analysis, GPC, and wide-angle X-ray diffraction, had inheren…
A gas‐filled bubble in a liquid undergoes cycles of growth, rapid collapse, and damped rebounds in response to a driving pressure. These nonlinear oscillations can be simulated using the Rayleigh‐Plesset equation (RPE), which was developed 50 years ago and is the foundation for almost all theoretical analyses of nonli…
A general theoretical model of the origin of the magnetic anisotropy in paramagnetic metal-containing liquid crystals is developed. General relations between the molecular magnetic anisotropy of mesogenic lanthanide complexes and the macroscopic magnetic anisotropy of these liquid crystals in the mesophase are obtaine…
Optical activity, used here for the first time to gain information about the amorphous solid state, allows previously unavailable insight into the dynamic properties of polymer glasses and their effect on a chemical process. This is accomplished by dispersing in polymer glasses atropisomeric bridged binaphthyls with a…
The cationic complex [Co(4-terpyridone)2]2+ where 4-terpyridone is the terpy-like ligand 2,6-bis(2-pyridyl)-4-(1H)-pyridone has been synthesized. High-spin and different spin crossover behaviors have been observed in the solid state depending on the counterion SO42-, Cl-, or ClO4-. The room temperature crystal structu…
The generation of optical anisotropy induced by irradiation with linearly polarized 365 nm light and by oblique irradiation with nonpolarized 365 nm light and subsequent annealing was described for liquid crystalline polymethacrylates with p -methoxyazobenzene side chains. Exposure of the spin-coated films of the poly…
Cell dynamics simulations of ordered structures formed in diblock copolymer melts were performed to investigate the effects of simulation parameters on the morphological features and kinetics of ordering from the initial disordered state. We show that sphere, cylinder, lamellar, and bicontinuous structures can all be…
A formal platinum(V) dioxide cation [Pt,O2](+) can be generated in the gas phase by successive oxidation of Pt(+) with N2O. The ion's reactivity is in keeping with the dioxide structure OPtO(+), rather than with [Pt,O2](+) isomers having intact O-O bonds, e.g., the dioxygen complex Pt(O2)(+) and peroxo species PtOO(+)…
A simple strategy is presented for the construction of an electrochemical interface with a tunable kinetic barrier by self-assembling organically modified silica gel and gold nanoparticles. Self-assembly of an organically modified silica layer is carried out from the hydrolyzed sol of the precursor mercaptopropyltrime…