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。
Previous studies on conjugated polymer nanotubules, prepared by the template method, established that improvements in the molecular and supermolecular structure are responsible for the increase in the room temperature conductivity when the diameter decreases. Our study clearly indicates that a more complex situation c…
Sapphyrins are an important group of expanded porphyrins that show valuable anion binding characteristics. In this study, a "4 + 1" route to sapphyrin systems has been developed. Reaction of dialdehydes with a known tetrapyrrole intermediate 11b incorporating a bipyrrolic subunit afforded a wide range of sapphyrin-typ…
We report the observation of photoluminescence from single-walled carbon nanotubes (SWNTs) dispersed in a tetrahydrofuran(THF)/octylamine solution, providing the first clear evidence for individual SWNTs in nonaqueous solution. We also report the effective amine-assisted dispersion of C 60 and La@C 82 peapods. This so…
Titanate compounds have been recognized as key materials for understanding the coupling of magnetism and orbitals in strongly correlated electron systems. In the perovskite Ti oxide R TiO 3 (where R represents the trivalent rare-earth ions), which is a typical Mott–Hubbard insulator, the Ti t 2 g orbitals and spins in…
The conformational changes of bovine heart cytochrome c (cyt c) induced by the adsorption on gold nanoparticles with different sizes have been investigated by electronic absorption, circular dichroism (CD), and Fourier transform infrared spectra. The combination of these techniques can give complementary information a…
The usual approach to the development of new nonlinear dielectric materials focuses on the search for materials in which the components possess an inherently large nonlinear dielectric response. In contrast, based on thermodynamics, we have presented a first-principles approach to obtain the electrostriction-induced e…
Poly(methyl methacrylate) (PMMA) has been modified via a dc pulsed oxygen plasma for different treatment times. The modified surfaces were characterized by X-ray photoelectron spectroscopy (XPS), optical profilometer, zeta potential, and advancing contact angle measurements. The measured advancing contact angles of wa…
Isotropic nearly zero thermal expansion (i.e., negligible volume change) is reported in a large temperature range for Fe[Co(CN)6], a member of the Prussian blue family with electronically active metal sublattices and a cubic framework structure built by a cyanide-bridged network of octahedral units. Suitable selection…
We have built up a computer simulation of the detection mechanism in the diamond radiation detectors. The diamond detectors can be fabricated from a chemical vapour deposition polycrystalline diamond film. In this case, the trapping-detrapping and recombination at the defects inside the grains and at the grain boundar…
The biomimetic polymerization of acrylamide (1) with hydrogen peroxide catalyzed by water soluble iron(III) 5,10,15,20-tetrakis-(2,6-dichloro-3-sulfonatophenyl)porphyrin (3) gave high yield of polyacrylamide (2) in the molecular weight range of 1,30,000-1,50,000 g mol -1 in the absence and presence of 2,4-pentanedione…
The electric response of the glass-forming glycerol and crystalline ionic conductor Li0.18La0.61TiO3 is probed by modulus time domain measurements. A capacity correction algorithm is proposed to overcome the low capacitance limit of the technique. This method allows to Fourier-transform time domain data yielding undis…
The exact solution of the Schr\"odinger equation for the Coulomb potential is used within the scope of both stationary and time-dependent scattering theories in order to find the parameters which determine the regularization of the Rutherford cross section when the scattering angle tends to zero but the distance $r$ f…
Abstract The solubility parameter value (SP value, δ) is one of the most important factors in bonding technology. It was found that various kinds of rubber, such as VMQ (δ ≒ 7.3 cal 1/2 /cm 3/2 ) compounds, EPDM (δ ≒ 7.9 cal 1/2 /cm 3/2 ) compounds, and X‐NBR (δ ≒ 9.3 cal 1/2 /cm 3/2 ), can bond to poly(oxy‐2,6‐dimeth…
Abstract We designed and synthesized novel UV‐curable multifunctional acrylate monomers with perfluorinated aromatic units and their copolymers. The UV‐curable multifunctional acrylate monomers with perfluorinated aromatic units were synthesized as follows. Perfluorinated aromatic methylmethane derivatives were prepar…
The effect of disorder on the ferromagnetic transition is investigated in mechanically milled $\mathrm{Gd}{\mathrm{Al}}_{2}$. $\mathrm{Gd}{\mathrm{Al}}_{2}$ is a ferromagnet when crystalline and a spin glass when amorphous. Mechanical milling progressively disorders the alloy, allowing observation of the change from f…
Oxygen-incorporated hydrogenated amorphous carbon films were grown by the integrated distributed electron cyclotron resonance plasma technique from a mixture of acetylene and oxygen. It has been found that the increase of the oxygen to acetylene gas ratio results in more oxygen incorporation up to O∕(O+C)=0.2 with a d…
The coherent behavior of the single electron and single nuclear spins of a defect center in diamond and a $^{13}\mathrm{C}$ nucleus in its vicinity, respectively, are investigated. The energy levels associated with the hyperfine coupling of the electron spin of the defect center to the $^{13}\mathrm{C}$ nuclear spin a…
Fe 3 C incorporates only Fe as a metallic element and is an Invar material with valence electron concentration 8.67. We have studied the equation of state up to 20GPa of Fe3C particles (d∼40nm) below and above the Curie temperature (room temperature and 550K, respectively) to search for a softening associated with a m…
Boron-doped homoepitaxial diamond (100) films with substantially flat surface have been deposited by a high-power microwave-plasma chemical-vapor-deposition (MPCVD) method. Hall mobilities of 1500cm2∕Vs at 290K and 2220cm2∕Vs at 235K were attained for such a specimen with an acceptor density of 1.4×1018cm−3 grown at a…
The quest for a microscopic understanding of the physical properties of transition metal oxides with orbital degeneracy (`orbital physics') is currently at the forefront of solid-state physics. The field was kicked off nearly 50 years ago by a remarkable pair of papers. In the first, Wollan and Koehler reported using…