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 the synthesis and the properties of side-chain liquid-crystal polymer (LCP) brushes attached to silicon oxide surfaces. The polymer monolayers have been generated at the surface of the substrate in situ following a “grafting-from” procedure. The mesogenic group of the LC brushes consists of a phenylbenzoa…
The phase behavior of Zr(SO 4 ) 2 /CTAB composite mesophases was investigated as a function of surfactant chain length, temperature, and salt concentration by XRD. It was shown that the initial step is a rapid formation of either a pure lamellar, hexagonal, or a mixed hexagonal/lamellar phase with a low degree of cond…
The synthesis of novel dendrimers functionalized with laser dyes both at the periphery and at the core, along with all relevant model compounds necessary for accurate photophysical studies, is described. The utilized synthetic strategy involves a modular approach in which a variety of peripheral and core moieties can…
A morphological study of three A 5 B, six-arm miktoarm star block copolymers is presented. The miktoarm stars are comprised of five arms of polyisoprene and one arm of polystyrene joined together at a single junction point. The strong segregation limit theory for the morphological behavior of miktoarm stars predicts t…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTIncorporation of Metal Nanoparticles into Block Copolymer Nanodomains via in-Situ Reduction of Metal Ions in Microdomain SpaceTakeji Hashimoto, Masafumi Harada, and Naoki SakamotoView Author Information Hashimoto Polymer Phasing Pro…
Poly(propyleneimine)-based liquid crystalline dendrimers ( PPILCDs ) with a relatively flexible dendritic scaffold were successfully prepared by the Michael addition reaction of poly(propyleneimine)s with ω-(4‘-cyanobiphenyloxy)alkyl acrylate (1) . The structures of PPILCDs were characterized by IR spectroscopy, 1 H N…
In this paper we describe how pore-structure modification can be achieved in a highly ordered fashion through the use of bolaform surfactants containing a rigid unit in the hydrophobic chain. The silicate mesophase, SBA-8, synthesized using bolaform surfactants at room temperature, is a two-dimensional (2-D) pore stru…
A new synthetic method has been developed for preparing silver sulfide, Ag 2 S, nanoparticles capped with cysteine or glutathione. The average particle diameter has been determined to be around 9 nm using transmission electron microscopy. The ground-state electronic absorption spectra of the Ag 2 S nanoparticles show…
Iron(III) oxide nanoparticles were synthesized within mesoporous MCM-48 silica phases. By using multiple cycles of wet impregnation, drying, and calcination procedures, it was possible to form haematite nanoparticles almost exclusively within the pore system. Nitrogen sorption measurements still revealed mesoporosity…
Formation of clusters of interstitial carbon atoms between the surface and second atomic layers of graphite is demonstrated by means of molecular dynamics simulations. It is shown that interstitial clusters result in the dome-like surface features that may be associated with some of the hillocks observed by STM on the…
The difficulty in processing filled materials is often a limiting factor in advanced materials development because of the large changes in fluid viscosity observed in these materials. It is widely ...
The spontaneous spreading of liquid droplets is studied by molecular modeling simulations. By considering very large systems, we are able to study the influence of the solid−liquid interactions on the overall wetting dynamics. It is shown how microscopic parameters, such as the mobility of the molecules near the solid…
The vibrational properties of poly(3,4-ethylenedioxythiophene) (PEDT) have been studied by means of UV−vis−NIR optical absorption spectroscopy and resonance Raman scattering (RRS) spectroscopy with two excitation lines: green (514 nm) and infrared (1064 nm). The two-step oxidative doping process does not induce a dras…
The stability of axisymmetric steady thermocapillary convection of electrically conducting fluids in half-zones under the influence of a static axial magnetic field is investigated numerically by linear stability theory. In addition, the energy transfer between the basic state and a disturbance is considered in order…
The visible luminescence of Pr 3+ -doped lead germanate glass of composition (in mol%) 60PbO-40GeO 2 has been investigated for two Pr 3+ concentrations at different temperatures by using steady-state and time-resolved laser spectroscopy. Concentration quenching of the 1 D 2 emission is observed for Pr 3+ concentration…
We prepared polymer dispersed liquid crystal (PDLC) composite films using polymethyl methacrylate (PMMA) and the ferroelectric liquid crystal (LC) Felix 015/000 (Hoechst) by the solvent-induced phase separation method. We studied the phase transitions by the thermally stimulated depolarization currents (TSDC) method a…
High Resolution Image Download MS PowerPoint Slide Novel rigid and optically active dendrimers containing cross-conjugated units are synthesized from the coupling of phenylacetylene-based dendrons with an optically pure diacetate of 4,4‘,6,6‘-tetrabromo-1,1‘-bi-2-naphthol. The UV and fluorescence spectroscopic studies…
An overview of advanced dynamical algorithms capable of spanning the widely disparate time scales that govern the decay of metastable phases in discrete spin models is presented. The algorithms discussed include constrained transfer-matrix, Monte Carlo with Absorbing Markov Chains (MCAMC), and projective dynamics (PD)…
A study of 13C hyperfine structure in the EPR of nickel-nitrogen-containing centres in diamond and correlation with their optical properties, V A Nadolinny, A P Yelisseyev, J M Baker, M E Newton, D J Twitchen, S C Lawson, O P Yuryeva, B N Feigelson
Crystalline Co$_{x}$Cu$_{1-x}$ alloys show interesting magnetic behavior over the entire concentration regime. We here present a fully self- consistent first principles electronic structure studies of the electronic structure and magnetic properties of the system.We present results for the variation of density of stat…