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 the synthesis, as well as the complex thermal and assembling properties, of a series of three triblock copolymers 1 − 3, each of which is based on aliphatic polyether third-generation dendron ends that contain tetradecyl peripheries and a hydrophilic linear poly(ethylene oxide) (PEO) middle block. Because of…
Single-walled carbon nanotubes (SWCNTs) were synthesized using ethanol CVD to study the nucleation kinetics of nanotube growth. By counting the number density of SWCNTs, i.e., the number of nanotubes per unit area on the substrate, the nucleation process of SWCNT growth was studied extensively within a wide range of g…
Abstract The structure and magnetic properties of double azido‐bridged Cu II binuclear complex 1 with the chelating chiral ligand ( S , S )‐2,2′‐isopropylidenebis(4‐phenyl‐2‐oxazoline) were analyzed by combining experimental and theoretical techniques. The Cu II ions adopt a square pyramidal geometry with different de…
Abstract This communication describes an ultrasonically assisted in‐situ dynamic inverse emulsion polymerization process of aniline in the presence of multi‐walled carbon nanotubes (MWNT) in toluene. During polymerization, MWNT are coated with polyaniline (PANI), forming a core‐shell structure of nano‐wires observed b…
A new class of organic−inorganic liquid crystalline hybrid materials consisting of an azobenzene derivative and titanium oxide (6Az5COO-TiO and 6Az1COO-TiO) was synthesized. 6Az5COO-TiO with a C5 spacer showed a smectic liquid crystalline phase. The organic 6Az5COO and TiO inorganic components in the hybrid film were…
Abstract First‐principles LDA + U calculations have been performed to study the effects of oxygen vacancies (V O ) on the electronic structure and magnetism in undoped rutile TiO 2– x . Instead of treated as an adjustive parameter, the value of U was determined by constrained‐density‐functional calculations. The calcu…
A fluorous biphasic hexa(3,5-substituted-phenyl)benzene (HPB), analogous to semifluorinated alkanes, was synthesized such that precise chemical and orthogonally directed, supramolecular placement of amphiphilic side chains at their bulk density was achieved. The grafting or tethering of incommensurate hydrocarbon and…
The formation of helical scrolls formed by self-assembly of tethered nanorod amphiphiles and their molecular analogs are investigated. A model bilayer sheet assembled by laterally tethered nanorods is simulated and shown that it can fold into distinct helical morphologies under different solvent conditions. The helice…
We propose a multiscale protocol for the simulation of conformation and dynamics of dendrimer molecules in dilute solution. Conformational properties (radius of gyration, mass distribution, and scattering intensities) and overall hydrodynamic properties (translational diffusion and intrinsic viscosity) are predicted b…
Abstract CuO nanorods were prepared via ultrasound‐assisted synthesis in the room temperature ionic liquid (RTIL) 1‐butyl‐3‐methylimidazoliumbis(trifluoromethylsulfonyl)imide [C 4 mim][Tf 2 N] as a reaction medium. The structure and morphology of CuO nanorods were characterized with X‐ray powder diffraction (XRD), tra…
Three series of chiral amphiphilic G1-G3 dendritic organocatalysts containing an optically active polar proline-derived core and one or two nonpolar hydrocarbon dendrons were prepared. These dendritic organocatalysts were employed in the asymmetric aldol and nitro-Michael additions in oil-in-water emulsions to reveal…
Biomacromolecules represent new structures employed for the fabrication, assembly, and subsequent use of nanomaterials for a variety of applications. By genetically selecting for the binding abilities of these bio-based molecules, the generation of materials with enhanced and environmentally sound properties is possib…
Novel hierarchical ZnO mesocrystals and ultralong ZnO nanowires have been prepared from a precursor of synthetic layered basic zinc acetate nanobelts by a facile solution route in the presence of poly(vinyl pyrrolidone) (PVP). X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscop…
Nanocubes of copper selenide (Cu 2- x Se) have been synthesized through an electrochemical crystallization method using cetyltrimethylammonium bromide (CTAB) as the structure directing agent. The shapes of Cu 2- x Se nanocubes can be controlled by the adsorption effect of CTA + hydrocarbon chain and Br − ion on the fa…
In the present article, we studied the structuration mechanism of palladium nanocrystals (NCs) of different shapes (cubes, pentatwinned nanorods, pyramids, and pentatwinned decahedra) prepared via the seed-mediated reduction of a palladium salt in aqueous medium, in the presence of CTAB surfactant. A detailed time-res…
The preparation, X-ray crystallography, and magnetic investigation of the compounds [Co(H(2)O)(2)(phda)](n) (1), [Co(phda)](n) (2), and [Co(chda)](n) (3) [H(2)phda = 1,4-phenylenediacetic acid and H(2)chda = 1,1-cyclohexanediacetic acid] are described herein. The cobalt atoms in this series are six- (1) and four-coord…
In this work, Evans' homogeneous nonequilibrium molecular dynamics method for estimating thermal conductivity is extended to systems employing three-body potentials. This extension is put on a firm theoretical basis and applied to a silicon lattice modeled by the Stillinger-Weber potential. Two new methods are suggest…
The adsorption of cationic polyelectrolytes (C-PAMs and PDACMAC) with different charge densities and molecular weights on silica and cellulose model surfaces was examined using a quartz crystal microbalance with dissipation, QCM-D. The conformation and viscoelastic properties of the adsorbed polyelectrolyte layers wer…
Paraffin wax deposition is a ubiquitous phenomenon in the petroleum production industry. Many types of internal pipe coating materials have previously been tested for preventing wax deposition, but none have demonstrated successful performance. It has become increasingly evident that an improved knowledge of the chemi…
The strong long-range Coulomb interaction between massless Dirac fermions in graphene can drive a semimetal-insulator transition. We show that this transition is strongly suppressed when the Coulomb interaction is screened by such effects as thermal fluctuation, doping, disorder, and finite volume. It is completely su…