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 polarization response of 0.95[0.94(Bi0.5Na(0.45)Li0.05)TiO3-0.06BaTiO3]-0.05CaTiO3 ceramics was studied under weak applied cyclic electric fields with different amplitudes and frequency. The analysis of the polarization signals showed that in the ferroelectric phase the non-linearity is dominated by a Rayleigh-typ…
A novel ratiometric fluorescent receptor (Z)-2-(4-[diethylamino]-2-hydroxybenzylideneamino) pyridine-3-carbaldehyde (3) bearing one phenolic OH and one aldehyde group as recognition sites was synthesized and characterized. The anion recognition behaviour of receptor 3 was evaluated by various spectroscopic (UV-visible…
Kalil C.F. Toledoab, Tiago A. Matiasc, Herculys B. Jorgea, Henrique E. Tomac, Juliano A. Bonacinb & Vagner R. de Souza*aa Department of Chemistry, State University of Maringá, Maringá, Brazilb Institute of Chemistry, University of Campinas – UNICAMP, Campinas-SP, Brazilc Institute of Chemistry, University of Sao Paulo…
Effect of annealing time on the micro structure and electromechanical properties PVDF TrFE CTFE terpolymer with 7.8 mol % CTFE was investigated to better understand structure-property relationships in these polymers. DSC results show that the 9 hr-annealing time gives the maximum enthalpy of melting which suggests the…
The ferroelectric switching characteristics of a vinylidene fluoride and trifluoroethylene copolymer were significantly changed via the chemical modification of a gold electrode with an alkanethiol self-assembled monolayer (SAM). The alkanethiol SAM-Au electrode successfully suppressed the leakage current (dark curren…
Abstract The main objective of this paper is to present the design and experimental validations of a model‐based control scheme, which aims at smooth and fast response for spark ignition (SI) engines during the starting phase. The control scheme consists of the fuel injection control loop and the speed regulation loop…
We have observed highly efficient intrinsic phosphorescence of a neat σ-conjugated polymer, poly(biphenyl-4-ylmethylsilylene) (PBMSi). At low temperatures, PBMSi solid films featured ∼15% phosphorescence quantum yield, which is unusually high for purely organic conjugated polymers and is comparable to that of organome…
Three new resorcin[4]arene-based coordination polymers, [Cd3L(H2L)(H2O)2]·2DMF·11.5H2O (1), [Zn4L2(H2O)4]·2DMF·10H2O (2) and [Mn9L4(HCOO)2(H2O)12·(DMF)2]·2DMF·10H2O (3) (H4L = tetrakis(ω-carboxybutyl)methylene resorcin[4]arene, DMF = N,N′-dimethylformamide), have been solvothermally synthesized. Compounds 1–3 are all…
The global digital data has increased at an unprecedented rate during the last decade due to the digitization service of every industry as well as the rapid development of information technology. It is therefore timely to enhance the areal density of the mainstream storage devices in order to meet the current storage…
Based on the electronic band structure, we have calculated the dispersion of the linear and nonlinear optical susceptibilities for the mixed CuAl(S1−xSex)2 chaclcopyrite compounds with x = 0.0, 0.25, 0.5, 0.75, and 1.0. Calculations are performed within the Perdew-Becke-Ernzerhof general gradient approximation. The in…
Reflection of plane electromagnetic waves from an impedance boundary with the surface impedance equal to the wave impedance of the surrounding medium is addressed. It is shown that compared with other impedance boundaries, the impedance-matched boundary guarantees the lowest mean reflectance when the incidence directi…
Attaching dendritically branched side chains to each repeat unit of a linear polymer produces molecular building blocks of nanometer-sized dimensions called dendronized polymers. The structure of these complex molecular architectures is highly tunable and, therefore, of interest for a wide range of potential applicati…
Crystals of Boc-γ(4)(R)Val-Val-OH undergo a reversible first-order single crystal to single crystal phase transition at Tc ≈ 205 K from the orthorhombic space group P22121 (Z' = 1) to the monoclinic space group P21 (Z' = 2) with a hysteresis of ∼2.1 K. The low-temperature monoclinic form is best described as a nonmero…
Structural color is produced when nanostructures called schemochromes alter light reflected from a surface through different optic principles, in contrast with other types of colors that are produced when pigments selectively absorb certain wavelengths of light. Research on biogenic photonic nanostructures has focused…
An analytic scheme is presented for the evaluation of first derivatives of the energy for a unitary group based spin-adapted coupled cluster (CC) theory, namely, the combinatoric open-shell CC (COSCC) approach within the singles and doubles approximation. The widely used Lagrange multiplier approach is employed for th…
Semiconductor systems of reduced dimensionality, e.g., quantum dots or quantum wells, display a characteristic spectrum of confined excitons. Combining several of these systems may lead to the formation of “crossed” excitons, and thus new equilibrium states and scattering channels. We derive gain excitation spectra fr…
Abstract Novel surface active maleate and methacrylate monomers based on derivatives of ω‐hydroxy carboxylic acids have been synthesized. The monomers are comprised of hydrophobic alkyl chains and hydrophilic poly(ethylene glycol), quaternary ammonium, sulfonate and carboxylic fragments. Synthesized monomers sufficien…
Capillary forces are important in nature (granular materials, insect locomotion) and in technology (disk drives, adhesion). Although well studied in equilibrium state, the dynamics of capillary formation merit further investigation. Here, we show that microcantilever crack healing experiments are a viable experimental…
We study the short time properties of a two-dimensional film growth model in which incident particles execute advective-diffusive motion with a vertical step followed by $D$ horizontal steps. The model represents some features of the deposition of anisotropic colloidal particles of the experiment in Phys. Rev. Lett. {…
The present work describes the promising electrochemical immunosensing strategy based on copper (II) assisted hierarchical cysteine structures (CuCys) varying from star to flower like morphology. The CuCys having average size of 10 μm have been synthesised using L-Cysteine as initial precursor in presence of copper ox…