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。
A continuous surface wetting transition, pinned to a solid/liquid/liquid/vapor tetra coexistence point, is studied by x-ray reflectivity in liquid Ga-Bi binary alloys. The short-range surface potential is determined from the measured temperature evolution of the wetting film. The thermal fluctuations are shown to be i…
We report the preparation and structural characterization of core/shell CdSe/CdS/ZnS nanorods. A graded shell of larger band gap is grown around CdSe rods using trioctylphosphine oxide as a surfactant. Interfacial segregation is used to preferentially deposit CdS near the core, providing relaxation of the strain at th…
A new organic molecular conductor, based on a spiro-biphenalenyl neutral radical, simultaneously exhibits bistability in three physical channels: electrical, optical, and magnetic. In the paramagnetic state, the unpaired electrons are located in the exterior phenalenyl units of the dimer, whereas in the diamagnetic st…
Magnetostriction measurements were performed at different temperatures for Fe 81 Si 3.5 B 13.5 C 2 METGLAS ® films using a strained substrate technique. The magnetostriction constant was deduced from magnetic properties measured using a vibrating sample magnetometer. The film strain was varied using a range of curved…
In this paper, the synthesis of a number of new methacrylate esters containing amide group are described. The monomers produced from the reaction of corresponding α-chloro-N-aryl or -N-alkyl acetamides with sodium methacrylate were polymerized with AIBN as initiator. The monomers and their polymers were characterized…
Abstract The effects of 2‐aminobenzenesulfonic acid (orthanilic acid), 3‐aminobenzenesulfonic acid (metanilic acid), and 4‐aminobenzenesulfonic acid (sulfanilic acid) on the electropreparation and properties of polyaniline (PANI) were investigated in acetonitrile containing 200 m M fluorosulfonic acid. The cyclic volt…
We apply the tensorial formalism to the dynamics of molecular liquids and glasses. This formalism separates the degrees of freedom into translational and orientational ones. Using the Mori-Zwanzig projection formalism, the equations of motion for the tensorial density correlators S(lmn,l'm'n')(q-->,t) are derived. For…
A sensor for nitric oxide is reported that uses a novel redox matching mechanism to induce a resistance change upon binding this important ligand to cobalt.
Long-term creep-deformation and shrinkage characteristics of improved ultrathin polymeric films for magnetic tapes are presented. These films include poly(ethylene terephthalate) (PET), poly(ethylene naphthalate) (PEN), and aromatic polyamide (ARAMID). PET film is currently the standard substrate used for magnetic tap…
The reduction of calcium sulfate to produce calcium sulfide is not only a part of the cyclic process for converting sulfur dioxide to elemental sulfur described in part 1 of this series but also of interest as a means of producing elemental sulfur from gypsum. This reaction was investigated using a thermogravimetric a…
Abstract A new method of chemical bonding analysis in crystalline solids is suggested. Wannier functions centered on atoms and related to upper valence and lower conduction bands of a crystal [Wannier‐type atomic orbitals (WTAO)] are proposed to play a part of atom‐like functions in population analysis. A straightforw…
[reaction] A self-complementary V-shaped bis-porphyrin cavity has been synthesized that is capable of dimerization to form a capsule structure. Self-assembly of the dimer occurs via metal ion coordination and produces an internal volume for guest encapsulation.
Star-shaped stilbenoid zinc phthalocyanines with π-conjugated oligo( p -phenylenevinylene)s (OPVs) have been prepared for fine-tuning of absorption and fluorescence bands. The direct introduction of OPV segments at β-positions of Zn phthalocyanines induced shifts in the Q-band and emission band compared to the complex…
We explain the origin of the high-energy mode in the first-order Raman spectra of single-walled carbon nanotubes by double-resonant scattering. Following this interpretation, we calculate the multiple-peak structure as found in Raman experiments. The highest peak is above the graphite $\ensuremath{\Gamma}$-point frequ…
A method is presented for the determination of physical discharge parameters for partial discharges (PDs) of voids in solid insulation. Based on a recently developed stochastic theory of PD processes, a statistical analysis of a measured phase-resolved partial discharge (PRPD) pattern allows the determination of the r…
Abstract X‐ray photoelectron spectroscopy analysis of Cu 2p peaks is able to discriminate between Cu(II) and Cu(I). This is particularly useful when copper is supported in a zeolite matrix, as in heterogeneous catalysts. The preparation route, the Si/Al ratio and the kind of zeolite all contribute to determine the fin…
Maxwell-Wagner piezoelectric, dielectric and elastic relaxations in two-layer or multilayer serial piezoactive media are considered. As distinct from the oversimple model, described in literature, we derive exact solutions by taking into account mechanical boundary conditions, transversal piezoelectric response and el…
[reaction: see text] 5,10,15,20-Tetrakis(m-hydroxyphenyl)porphyrin (m-THPP) yielded novel quinonoid porphyrins upon irradiation in aqueous methanol. True photobleaching was observed for 5,10,15,20-tetrakis(m-hydroxyphenyl)chlorin (m-THPC) and 5,10,15,20-tetrakis(m-hydroxyphenyl)bacteriochlorin (m-THPBC) under the same…
Abstract Core–shell latex with polyacrylate rich in core and fluoropolymer rich in shell was prepared by semicontinuous emulsion polymerization in the presence of mixed emulsifiers. The solids content of the latex was about 25 wt %. The polymerization conditions for the latex were discussed. The morphology of latex pa…
Abstract Metal salts of mono(hydroxypentyl)phthalate [M(HPP) 2 , where M is Ca 2+ , Cd 2+ , Pb 2+ , or Zn 2+ ] were synthesized by the reaction of 1,5‐pentane diol, phthalic anhydride, and metal acetate. A new series of metal‐containing polyurethanes containing ionic links in the main chain were synthesized by the rea…