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。
We report on magnetic field and temperature-dependent measurements of the anisotropic magnetoresistance (AMR) in epitaxial La1−xSrxMnO3 (LSMO) thin films. While in 3d ferromagnetic alloys increasing the magnetization, either by reducing the temperature or increasing the magnetic field, increases the AMR, we find that…
A porphycene having four CF3 groups at the beta-pyrrolic positions affords a stable 20pi-conjugated form in the presence of a 2H+-2e- donor due to the high redox potential of the tetrapyrrole ring framework. No visible band in the UV-vis spectrum and the highly ruffled structure determined by X-ray crystallography sup…
Abstract In order to improve the water solubility of nonpolar compounds such as drugs or dyes, new amphiphilic molecules are needed. In this paper we describe a new class of triblock amphiphiles that we have synthesized by a straightforward convergent approach. These amphiphiles each consist of a nonpolar biphenyl cor…
Abstract A room temperature ionic liquid 1‐allyl‐3‐methylimidazolium chloride ([AMIM]Cl) was a promising direct solvent for starch and nonderivitizing solvent for starch‐effective dissolution, in which the ring‐opening graft polymerization (ROGP) of L ‐lactide ( L ‐LA) onto starch chains was carried out homogeneously.…
Dense K4CuNb8O23 modified (Na0.5K0.5)NbO3 (NKN:KCN) ceramics were synthesized by using conventional oxide mixing process. The maximum mechanical quality factor Qm of NKN:KCN ceramics reaches up to 1150, the piezoelectric constant d33 and the planar electromechanical coefficient kp still maintain relatively high levels…
Dissipative particle dynamics simulations were performed on multicompartment micelles formed by blending star and linear triblock copolymers, in which the influences of blending options and blending ratio as well as copolymer chain compositions were studied systematically. The results show that blending of copolymers…
The MgSO 4 crystal hydrate formed below approximately 0 °C was proven to be the undecahydrate, MgSO 4 ·11H 2 O (meridianiite) instead of the reported dodecahydrate MgSO 4 ·12H 2 O. The crystals were grown from solution by eutectic freeze and by cooling crystallization. The crystal structure analysis and the molecular…
Nearly monodispersed indium oxide (In 2 O 3 ) nanocrystals with tunable sizes of <10 nm were prepared by a one-pot solvothermal route using indium oleate as the precursor. The nanocrystals were characterized by transmission electron microscopy (TEM), high-resolution TEM, X-ray diffraction, X-ray photoelectron spectros…
The multiresponse molecule salicylidene Schiff base, N -3,5-dichlorosalicylidene-( S )-α-phenylethylamine (SPEA), was fully encapsulated into the channel of the amino-functionalized mesoporous molecular sieve SBA-15 via the hydrogen bond assembly. This organic/inorganic hybrid material was well-characterized by X-ray…
A first example of the fabrication of large-scale diffractive microlens arrays on n-GaAs using an efficient electrochemical technique named CELT (confined etchant layer technique) is reported. This microlens array is an eight-phase level diffractive optic device with eight concentric rings and seven steps in one lensl…
Abstract One of the great challenges in photonics has been to modify silicon to enhance light emission properties. In this review article we survey recent studies which have generated light from silicon in a variety of ways including introduction of emissive centers, anodization, fabrication of quantum‐confined struct…
Electron spins of molecular magnets are promising candidates for large scale quantum information processing because they exhibit a large number of low-lying excited states. In this paper X-band pulse electron paramagnetic resonance spectroscopy is used to determine the intrinsic relaxation times T1 and T2 of a molecul…
We report an ultrasonic investigation of the elastic moduli on a single crystal of hexagonal $\mathrm{Y}\mathrm{Mn}{\mathrm{O}}_{3}$ as a function of temperature. Stiffening anomalies in the antiferromagnetic N\'eel state below ${T}_{N}=72.4\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ are observed on all the four elastic mo…
A single-crystalline EuF 3 nanoflower with a novel three-dimensional (3D) nanostructure has been successfully synthesized via a facile, fast, efficient, and mild ultrasonic irradiation solution route employing the reaction of Eu(NO 3 ) 3 and KBF 4 under ambient conditions without any template or surfactant. The ultras…
The dispersion of SWCNTs by using a novel diazapentacene derivative is reported. The proposed pi-pi interactions between the diazapentacene derivative and SWCNTs leave their inherent properties virtually intact, as observed by several photophysical measurements. This approach is very attractive for manipulation of SWC…
We present experimental evidence of a transition in the short-time Brownian motion of colloids from diffusive to subdiffusive, Rouse-like. This transition is seen for particles that are bound, through physical adsorption, to transient polymer networks. The characteristic Rouse scaling of the mean square particle displ…
The use of a new precursor, mer-[Fe(mpzcq)(CN)3]- (1), produced a dimeric molecule, [Fe(mpzcq)(CN)3][Mn(salen)(H2O)] x H2O (2), and a one-dimensional zigzag chain, [Fe(mpzcq)(CN)3][Mn(salcy)] x MeOH x MeCN (3). Antiferromagnetic couplings are operating between magnetic centers through CN ligands, and a field-induced m…
Degradation experiments and model studies suggested that the longer lived green fluorescence from an aggregated poly(p-phenylene ethynylene) (PPE) was due to the presence of highly emissive, low-energy, anthryl defect sites rather than the emissive conjugated polymer excimers proposed in a previous report. After eluci…
Defects present in ZnO nanocrystals prepared by a wet chemical method have been characterized by photoluminescence (PL) and positron annihilation spectroscopy (PAS) techniques. The as-prepared sample was heat treated at different temperatures to obtain nanocrystals in the size range of 19–39nm. X ray diffractograms co…
Radial and longitudinal nanosized In 2 O 3 −SnO 2 heterostructures were produced by applying a suitable methodology of transport and condensation. Sequential evaporation−condensation over In-seeded alumina promotes the formation of a radial heterostructure, driven by the direct vapor−solid growth mechanism. The single…