Materials Literature
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The interparticle force between two colloidal particles in a nematic liquid crystal is directly measured as a function of the interparticle distance R by two different experimental methods: the free-release method and the optical tweezing method. The obtained force between an elastic 'dipole', which constitutes a coll…
Abstract The in situ polymerization of the anilinium‐intercalated synthetic mica clay can easily result in an intercalated polyaniline (PANI)/clay nanocomposite. The FT‐IR spectra demonstrated a significant shift for ν (CN) at 1292 cm −1 of the templated polymerized and intercalated PANI molecules. A red shift of λ m…
Amino end-terminated poly( l -lactic acid), poly(trimethylene carbonate), and polycaprolactone were synthesized via ring-opening polymerization techniques. The amino terminus was used to form a covalent link to poly(dichlorophosphazene), itself synthesized using a living cationic polymerization. The chlorine atoms in…
The synthesis and characterization of several formazans containing strong electron-withdrawing substituents (cyano and nitro) in the 3 position of the ligand backbone are described. Reactions of aryldiazonium cations with the conjugated bases of either cyanoacetic acid or nitromethane lead to 1,5-diaryl-3-cyano- or 3-…
In this work, Mg x Zn 1− x O (MZO) thin films were grown on quartz by rf magnetron sputtering technology. It was found that MZO films possess preferred c -axis orientation and exhibit hexagonal wurtzite structure up to a Mg composition of 44.26 mol%. Furthermore, the band gap determined by absorption spectra was small…
In this paper, we report the preparation and characterization of fluorophore-free luminescent organosilica nanoparticles (NPs) with sizes varying from 50 to 250 nm. These NPs were synthesized by the Stöber method by incorporating several organosilanes together with the silicate precursor (tetraethyl orthosilicate, TEO…
The two initial stages of spinodal decomposition of a symmetric binary Lennard-Jones fluid have been simulated by molecular dynamics simulations, using a hydrodynamics-conserving thermostat. By analyzing the growth of the average domain size R(t) with time, a satisfactory agreement is found with the R(t) proportional…
We present a mean-field theory to describe phase separations in mixtures of a nematic liquid crystal and a colloidal particle. The theory takes into account an orientational ordering of liquid crystals and a crystalline ordering of colloidal particles. We calculate phase diagrams on the temperature-concentration plane…
Abstract Multi‐walled carbon nanotube/polypropylene composites (PPCNs) were prepared by melt compounding. The linear viscoelastic properties, nonisothermal crystallization behavior, and kinetics of PPCNs were, respectively, investigated by the parallel plate rheometer, differential scanning calorimeter (DSC), X‐ray di…
The scaling analysis of phase-change memory (PCM) cells is an essential step toward validation as a competitive technology in terms of array density and current consumption. While the current scaling has been addressed in a companion paper, we focus here on the thermal crosstalk, namely, the temperature increase in 1…
A highly efficient direct electrodeposition method was used to prepare Co−Cu alloy nanotubes in an anodic alumina template without modification. The morphology and structure of as-prepared Co−Cu nanotubes were examined by scanning electron microscopy, transmission electron microscopy, and X-ray diffraction. The format…
We describe a general Monte Carlo (MC) suite for the efficient relaxation of dense systems of freely jointed chains of hard spheres for packing densities (φ) ranging from dilute ones (φ ≈ 0.1) up to the vicinity of the maximally random jammed (MRJ) state (φ ≈ 0.639). Key components of the new MC scheme are as follows:…
The transverse and longitudinal magnetostrictions of LaCoO 3 have been measured in pulsed magnetic fields of up to 35 T in the temperature range between 4.2 and 300 K. The magnetostrictions are proportional to the squared magnetic field of up to B 0 =25 T. The magnetostrictions at B < B 0 are analyzed with a spin-stat…
The mesophase structure of ordered periodic mesoporous organosilicas (PMOs) can be easily adjusted under basic conditions by variation of the sodium hydroxide concentration. PMOs with hexagonal ( p 6 mm, two-dimensional pore system), cubic ( Pm 3 n or Fm 3 m, three-dimensional cagelike pore system), and disordered hex…
Abstract Polyacrylamide/graphite superabsorbent composite was synthesized by free radical polymerization of acrylamide monomer using N , N ′‐methylene‐bis‐acrylamide as crosslinker, potassium persulfate as initiator, and graphite as functional filler. On the basis of the superabsorbent composite, a hydrogel with a con…
Dilute magnetic semiconductors of Fe-doped ${\mathrm{SnO}}_{2}$ and ${\mathrm{TiO}}_{2}$ with the structure of rutile were prepared in forms of powder and thin films using the techniques of sol gel and pulsed-laser deposition. We present the results of measurement of vibrational density of states of Fe impurity dopant…
A new anisotropic soft-core model is presented, which is suitable for the rapid simulation of liquid crystal mesophases. The potential is based on a soft spherocylinder, which can be easily tuned to favor different liquid crystal mesophases. The soft-core nature of the potential makes it suitable for long-time step mo…
We measured the temperature dependence of resistivity of (TMTTF) 2 SbF 6 under high pressures up to 10 GPa. We observed superconductivity in the title compound for the first time when the high pressure exceeded 5 GPa. The local maximum of the superconducting transition temperatures was T c = 2.8 K at 6 and 9 GPa. The…
Abstract A series of novel poly(ester‐carbonate)s bearing pendant allyl ester groups P(LA‐ co ‐MAC)s were prepared by ring‐opening copolymerization of L ‐lactide (LA) and 5‐methyl‐5‐allyloxycarbonyl‐1,3‐dioxan‐2‐one (MAC) with diethyl zinc (ZnEt 2 ) as initiator. NMR analysis investigated the microstructure of the cop…
Abstract Poly(ethylene terephthalate)/expanded graphite conductive composites were prepared by the melt‐blending method. The relationships between the preparation methods, microstructures, and conductivity properties of the composites were studied with scanning electron microscopy and conductivity measurements. The re…