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。
Four ceramic powders were produced using the glycine–nitrate process: lanthanum‐doped barium cobaltite, ceria, magnesia, and strontium‐doped lanthanum chromite (LSC). Glycine‐to‐nitrate ratios from 0.25 to 1 were investigated. During the combustion synthesis process, careful collection of process off‐gas was followed…
We show that single-walled carbon nanotube (SWNT) bundles emit visible fluorescence in the presence of noble metal nanoparticles and nanorods in the solid state. Conductivity measurements with metallic nanotubes, isolated from pristine SWNTs, show that they become semiconducting in the presence of the metal nanopartic…
Abstract A series of donor–π–acceptor systems incorporating a tetrathiafulvalene moiety as the donating unit have been designed and synthesized. The efficiency of the imine (–C=N–) bond as a conjugated π‐linker in promoting intramolecular charge transfer is demonstrated and supported by calculations at the B3LYP/6‐31G…
Colloidal ZnGa2O4 nanocrystals with a mean size of about 7 nm were successfully synthesized by using a non-aqueous sol–gel method.The nanocrystals can easily be dispersed in chloroform to form stable colloids without the use of any additional stabilizers. Strong blue fluorescence was observed from the clear colloidal…
In this paper, we present a new numerical formulation that we have applied to the model for bipolar charge transport, trapping and recombination in polymeric insulators, such as low density polyethylene. The numerical model is based on the high precision Runge–Kutta method for determining mobile and trapped charge loc…
The hydrolytic and enzymatic degradation behavior of poly(epsilon-caprolactone) (PCL) is investigated using the Langmuir monolayer technique, and an improved data acquisition and data reduction procedure is presented. Hydrolytic and enzymatic monolayer degradation experiments of PCL with various molecular weights by P…
It is shown that all the known experimental (quasi)stationary dielectric response functions of glassy media can be derived from a standard generalized Langevin description of overdamped torsional dipole oscillators in trapping potentials with random orientations under some minimal assumptions. The non-Markovian theory…
This work describes the dilute solution and solid-state structure of polyelectrolyte complexes generated from hyperbranched polylysine (HBPL) and various anionic, sodium alkyl sulfate surfactants. In dilute solution, the radius of gyration ( R g ) of the HBPL and HBPL−surfactant complexes was determined in the Guinier…
Abstract Good quality single crystals of Ni 2+ , Co 2+ ions doped Bisthiourea Cadmium Chloride (BTCC) are some of the excellent and efficient non‐linear optical materials grown from aqueous solution by slow evaporation method. The lattice parameters of the grown crystals are determined by single crystal X‐ray analysis…
Cationic cellulosic polymers find wide utility as benefit agents in shampoo. Deposition of these polymers onto hair has been shown to mend split-ends, improve appearance and wet combing, as well as provide controlled delivery of insoluble actives. The deposition is thought to be enhanced by the formation of a polymer/…
Single crystals of ammonium lead iodide, NH 4 PbI 3 , have been obtained by solid-state reactions. Each Pb II ion is coordinated by six I − ions in a distorted octahedral environment. PbI 6 octahedra are connected by common edges, forming a one-dimensional anion chain. All atoms except one H atom in a general position…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTControlled Thioacyl Group Transfer (TAGT) Polymerization of Cyclic Sulfide: Novel Approach to AB Diblock Copolymers by the Combination of RAFT and TAGT PolymerizationsAtsushi Nagai, Naoyuki Koike, Hiroto Kudo, and Tadatomi Nishikubo…
Transition metal (Mn and Ni) doped ZnO nanocrystals with a diameter of 20 nm were fabricated by a low temperature solution processing technique. The incorporation of Ni and Mn into the ZnO lattice is evidenced by the shrinkage or expansion of the lattice parameters of ZnO in response to the transition metal dopants as…
The properties of ices Ih, II, III, V, and VI at zero temperature and pressure are determined by computer simulation for several rigid water models (SPC/E, TIP5P, TIP4P/Ice, and TIP4P/2005). The energies of the different ices at zero temperature and pressure (relative to the ice II energy) are compared to the experime…
We report a systematic first-principles study of structural properties, electronic structures and magnetic properties of Cr doped ZnTe with the Cr concentration up to 0.5. We fully optimize all the structures concerned, both ferromagnetic and antiferromagnetic, and their internal atomic positions. Our calculations sho…
The structural phase transition of SrTiO3 at 105 K, which has been believed to be independent of the ferroelectric soft mode [Phys. Rev. 177, 858 (1969)], is shown, on the contrary, to be driven by the same long-wavelength polar instability. Isotope replacement of 16O by 18O is predicted to cause an increase in the st…
Recent studies identified and established a platform of polymer surface modifications allowing the attachment of penicillin (PEN) to expanded poly(tetrafluoroethylene) (ePTFE) surfaces. The effectiveness of this approach was accomplished by creating surfaces with chemically attached PEN that prevent the proliferation…
The thermal conductivity of an individual single-walled carbon nanotube is calculated with the analysis of all possible combining and splitting umklapp scattering processes based on complete phonon dispersion relations. The relaxation rate for the transverse acoustic phonons that undergo the combination umpklapp proce…
Al-containing hydrogenated amorphous carbon (Al - C : H) films were deposited on silicon substrates using a mid frequency magnetron sputtering Al target in an argon and methane gas mixture. The composition, surface morphology, hardness and friction coefficient of the films were characterized using x-ray photoelectron…
Abstract The direct polycondensation of D , L ‐lactic acid in the absence and presence of different catalysts at various temperatures has been studied experimentally. Two types of reactions were carried out, one under closed conditions to estimate the equilibrium constant and the other under flow of nitrogen to estima…