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。
Manganese oxide thin films were deposited using thermal evaporation from a tungsten boat. Films were deposited under an oxygen atmosphere, and the effects of thickness, substrate temperature, and deposition rate on their properties were investigated. The chemical properties of the films were studied using x-ray photoe…
A series of Shore 80A polyether polyurethanes were synthesized with from 0 to 6% fluoropolymer surface modifying endgroups (SME) to provide the bulk properties of the polyurethane with the surface properties of the fluoropolymer. It was theorized that the fluoropolymer would migrate to the surface, forming a monolayer…
Bulk, Se-rich Ge 0.15 Se 0.85 − x Ag x (0 ⩽ x ⩽ 0.20) glasses show anomalous electrical switching behaviour which is attributed to difference in the thermal conductivities of Ag 2 Se inclusions and GeSe base glass. The present results also show that there is a sharp drop in switching voltage with silver addition, whic…
Effects of microencapsulated chitooligosaccharide addition in milk were evaluated by determination of the efficiency of microencapsulation, cholesterol removal, color, viscosity and sensory properties. Coating material was polyglycerol monostearate (PGMS) and the efficiency of microencapsulation was 88.08% at a 10:1 r…
The effect of molecular mass on the segmental dynamics of poly(methyl acrylate) (PMA) adsorbed on silica was studied using deuterium quadrupole-echo nuclear magnetic resonance (NMR) and modulated differential scanning calorimetry. Samples adsorbed on silica (all about 1.5 mg PMA/m2 silica) were shown to have more rest…
Results of isobaric and isothermal studies of dielectric relaxation in a vitrifying orientationally disordered crystal ${[{(\mathrm{C}{\mathrm{H}}_{3})}_{3}\mathrm{C}(\mathrm{C}{\mathrm{H}}_{2}\mathrm{O}\mathrm{H})]}_{0.70}{[{(\mathrm{C}{\mathrm{H}}_{3})}_{2}\mathrm{C}{(\mathrm{C}{\mathrm{H}}_{2}\mathrm{O}\mathrm{H})}…
We present molecular dynamics simulations of the glass transition in a chemically realistic model of 1,4-polybutadiene (PBD). Around 40 K above the calorimetric glass transition of this polymer the simulations reveal a well-developed two-stage relaxation of all correlation functions. We have analyzed the time-scale se…
A series of secondary ammonium monocarboxylate salts have been prepared by reacting variously substituted cinnamic acids and benzoic acids with dibenzylamine. Gelation tests reveal that 19 salts (9 cinnamates and 10 benzoates) are moderate to good gelators of various organic fluids, including commercial fuels such as…
Low-coordinated gold atoms play a decisive role in the catalytic cycle of low-temperature CO oxidation or the selective oxidation of olefins. A comparative study of argon and oxygen ion-bombarded Au(111) surfaces (see microstructure images) reveals a threefold role of adsorbed oxygen: structure formation, stabilizatio…
In this communication we present a detailed study of the magnetic properties of ordered Ni-Pt alloys. We study the alloys through field-cooled and zero-field cooled dc magnetization, nonlinear ac susceptibility and sound velocity and internal friction experiments. We also present a theoretical analysis of the magnetic…
The subject of this work is new method of the synthesis of biodegradable copolymers compatible with brain tissue. Copolymerization of glycolide with lactide was conducted in solution or in bulk in the presence of LiBu, LiAcac, MgBu(2), Mg(acac)(2) as initiators. In all cases, copolymers with molecular weight of 20000-…
Electronic assemblies rely heavily on soldering to attach components to the interconnect wiring on printed circuit boards and other types of substrates. In response to environmental legislation, the lead-tin alloys commonly used for soldering are being replaced with lead-free alloys and electrically conductive adhesiv…
The two-photon-resonant first hyperpolarizabilities associated with hyper-Rayleigh and hyper-Raman scattering are reported for 4-dimethylamino-4-nitrostilbene in 1,4-dioxane, dichloromethane, acetonitrile, and methanol, and for an ionic analog, 4-N,N-bis(6-(N,N,N-trimethylammonium)-hexyl)amino-4-nitrostilbene dibromid…
LC-MS/MS was used to identify secreted proteins in the Antarctic archaeon Methanococcoides burtonii. Seven proteins possessing a classical class 1 signal peptide were identified in the supernatant from cultures grown at 4 and 23 degrees C. The proteins included a putative S-layer cell surface protein, cell surface pro…
High-resolution electron energy loss spectroscopy was used to investigate the low-energy collective excitations of the $\mathrm{Cu}(111)$ surface. Measurements showed a collective mode with an energy of $1.1\phantom{\rule{0.3em}{0ex}}\mathrm{eV}$. The measured dispersion of the plasmon mode was negative. We suggest th…
Abstract X 1 ‐Y 2 SiO 5 :Eu 3+ and X 1 ‐Y 2 SiO 5 :Ce 3+ and/or Tb 3+ phosphor layers have been coated on nonaggregated, monodisperse, submicron spherical SiO 2 particles by a sol–gel process, followed by surface reaction at high temperature (1000 °C), to give core/shell structured SiO 2 @Y 2 SiO 5 :Eu 3+ and SiO 2 @Y…
Abstract The synthesis, crystal structures, spectroscopic and magnetic properties studies of four trinuclear oxo‐centered carboxylate complexes are reported and discussed: [Cr 3 (μ 3 ‐O){O 2 C(OH)Ph 2 } 6 (H 2 O) 3 ](NO 3 ) · 2H 2 O · 3Me 2 CO ( 1· 2H 2 O · 3Me 2 CO), [Cr 3 (μ 3 ‐O)(O 2 CPh) 6 (H 2 O) 3 ](NO 3 ) · 1.9…
A distinction between two common definitions of Seebeck coefficient is clarified. The effective Seebeck coefficient, which describes the effective electric field induced by a temperature gradient, is found to be a constant for a homogeneous doped semiconductor regardless of its doping.
We describe the small-biomolecule (glycyl glycine)-directed synthesis of single-crystalline silver nanoplates, and different experimental conditions have been explored for a more thorough understanding of the growth mechanism. The yield of silver nanoplates relative to the total number of nanoparticles formed was as h…
Even–odd effects: Oxidation patterns of the mass-selected Aun (n=2–10) clusters deposited on silica surfaces are reported. An additional Au atom can drastically change the oxidation pattern of the Au clusters. Au5 and Au7 (see picture) are suggested to be highly stable upon oxygen exposure. Formation of AuO bonds is…