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 effect of nanosized silica particles on the properties of poly(vinyl acetate) (PVAc) was investigated for a range of silica concentrations encompassing the percolation threshold. The quantity of polymer adsorbed to the particles (“bound rubber”) increased systematically with silica content and was roughly equal to…
Single-phase bulk samples of the "exotic" CoO2, the x = 0 phase of the AxCoO2 systems (A = Li, Na), were successfully synthesized through electrochemical de-intercalation of Li from pristine LiCoO2 samples. The samples of pure CoO2 were found to be essentially oxygen stoichiometric and possess a hexagonal structure co…
Two-photon polymerization has been demonstrated as an effective technique to define embedded defects in three-dimensional photonic crystals. In this work we demonstrate the ability to precisely position embedded defects with respect to the lattice of three-dimensional photonic crystals by imaging the structure concurr…
We have studied the electronic structure of multilayers composed of a band insulator $\mathrm{La}\mathrm{Al}{\mathrm{O}}_{3}$ (LAO) and a Mott insulator $\mathrm{La}\mathrm{V}{\mathrm{O}}_{3}$ (LVO) by means of hard x-ray photoemission spectroscopy, which has a probing depth as large as $\ensuremath{\sim}60\phantom{\r…
We report all-electron variational and diffusion quantum Monte Carlo (VMC and DMC) calculations for the noble gas atoms He, Ne, Ar, Kr, and Xe. The calculations were performed using Slater-Jastrow wave functions with Hartree-Fock single-particle orbitals. The quality of both the optimized Jastrow factors and the nodal…
This article presents a general overview about the designed synthesis of one-dimensional (1-D) inorganic and organic–inorganic hybrid fibrous nanostructures templated through the use of organogelator-based supramolecular assemblies. The growing number of structural families and derivatives of low-molecular-weight orga…
We predict that neutral graphene bilayers are pseudospin magnets in which the charge density contribution from each valley and spin spontaneously shifts to one of the two layers. The band structure of this system is characterized by a momentum-space vortex, which is responsible for unusual competition between band and…
Nonwoven fiber mats of chitosan with potential applications in air and water filtration were successfully made by electrospinning of chitosan and poly(ethyleneoxide) (PEO) blend solutions. Electrospinning of pure chitosan was hindered by its limited solubility in aqueous acids and high degree of inter- and intrachain…
We demonstrate that porous Si films fabricated by a convenient gold-assisted electroless etching process, which possess a hierarchical porous structure consisting of micrometer-sized asperities superimposed onto a network of nanometer-sized pores, are able to induce a superhydrophobic phenomenon on an intrinsically hy…
We study the electronic structures and magnetic properties of ${\mathrm{Mn}}_{2}\mathrm{Co}Z$ $(Z=\mathrm{Al},\mathrm{Ga},\mathrm{In},\mathrm{Si},\mathrm{Ge},\mathrm{Sn},\mathrm{Sb})$ compounds with ${\mathrm{Hg}}_{2}\mathrm{Cu}\mathrm{Ti}$-type structure using first-principles full-potential linearized-augmented plan…
Multifunctional polymer nanomedical platforms make simultaneous cancer-targeted MRI or optical imaging together with efficient drug delivery in vitro possible. In addition, clusters of Fe3O4 nanoparticles loaded in the polymer nanoparticles endow the magnetic guiding of the polymer particles, providing synergetic targ…
In recent years, intense research has been carried out worldwide with the goal of developing simple, sensitive, and specific detection tools for biomedical applications. Along these lines, we reported in 2002 on cationic polythiophene derivatives able to provide ultrasensitive detection levels and the capability to di…
For hundreds of years, models of magnetism have been pivotal in the understanding and advancement of science and technology, from the Earth's interpretation as a magnetic dipole to quantum mechanics, statistical physics, and modern nanotechnology. This book is the first to envision the field of magnetism in its entire…
This review presents an extensive discussion on the major advances in the field of periodically organized mesoporous thin films (POMTFs) obtained via surfactant templated growth of inorganic or hybrid polymers. A large variety of templating agents can be coupled with inorganic polymerization reactions for the design o…
Abstract An alternative route to acrylamide gel polymerisation is presented for the preparation of oxide nanopowders. Within this method, cations first dissolved in an aqueous solution are subsequently trapped inside a 3D chelating gel beforefast‐drying, which leads to a stable precursor. In this study, we have prepar…
The time-dependent binding mode of a porphyrin dimer to poly[d(G-C)2] and poly[d(A-T)2] was investigated by spectroscopic methods including absorption and circular and linear dichroism (CD and LD) spectroscopy. Immediately after mixing with poly[d(G-C)2], the porphyrin dimer exhibited red-shift and hypochromism in the…
It is found that in laser-induced thermoelectric voltage (LITV) signal in La1-xCaxMnO3and YBa2Cu3O7-y.H thin films, both the rise-time and decay time are increasing linearly with the total parallel-connected resistance of the load and the film. To obtain fast laser-induced thermoelectric voltage signal, smaller load s…
In macromolecular crystallography several programs are available to fulfil the steps from data integration via phasing to model refinement. The pathway is not fixed and it is often useful to combine several similar programs. There is no common data format used by all programs and conversions are required between the d…
Direct methods of phase determination have played an important role in determining heavy-atom substructures from difference amplitudes of native-derivative crystal pairs or crystals containing anomalously scattering atoms. The minimal principle-based Shake-and-Bake procedure is one of the most successful direct method…
The structural changes associated with the charge ordering (CO) transition in layered ${\mathrm{La}}_{0.5}{\mathrm{Sr}}_{1.5}\mathrm{Mn}{\mathrm{O}}_{4}$ have been determined by electron diffraction using the multislice least-squares method. The results demonstrate that the structural deformations of the ${\mathrm{Mn}…