Materials Literature
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A novel method for the treatment of solid-liquid interfaces in the framework of dissipative particle dynamics (DPD) is presented. The solid is represented by an amorphous, thermally rough ensemble of particles. Since the density of this phase is chosen commensurate to the liquid, artefacts of alternative wall models s…
Construction of various nanostructures using suitable self-assembling molecular building blocks is a challenging issue. Moreover, controlling the formation of a specific nanostructure from self-assembling molecular building blocks by tuning the pH of the solution is interesting. The present study demonstrates pH-respo…
The effect of the nonmesogenic solutes cyclohexane (CH), biphenyl (BP), and water (W) on the nematic-isotropic (N-I) and the nematic-smectic- A (N-SmA) phase transitions in the liquid crystal octylcyanobiphenyl (8CB) has been studied by means of adiabatic scanning calorimetry. For BP and CH a linear decrease of both t…
Using hydrazine (N2H4) as a cobridge with azide, a honeycomb-layered cobalt(II) coordination polymer, Co(N2H4)(N3)2 (1), is obtained that exhibits spin-canted weak ferromagnetism with TN of 13.5 K.
Four octacyanometalate-based bimetallic Cu-M (M = Mo, W) assemblies coordinated by tetradentate macrocyclic ligands were prepared via self-assembly process in a stoichiometric ratio of [M(CN)8]3- and Cu(macrocycle)2+ and characterized in terms of structures and magnetic properties. The crystal structures are varied de…
We consider magnetic systems where the magnetic sublattices can be unambiguously separated into sublattices of inducing and induced moments. The concrete numerical calculations are performed for half-metallic ferromagnetic Heusler compound NiMnSb and hexagonal phase of MnAs. In both systems, Mn atoms possess a robust…
Phase-field modeling has proven to be a versatile tool for simulating microstructural evolution phenomena, such as grain growth in polycrystalline materials. However, the computing time and computing memory requirements of a phase-field model pose severe limitations on the number of phase-field variables that can be t…
We report the synthesis and characterization of trans -Pt( p -CN−C 6 H 4 −C 2 H 5 ) 2 (CN) 2 and compare the properties to the previously reported cis isomer, cis -Pt( p -CN−C 6 H 4 −C 2 H 5 ) 2 (CN) 2 . These geometric isomers exhibit textbook differences in spectroscopic and vapochromic properties, especially in the…
In splendor arrayed: Coordinative interactions between zinc ions and terpyridine ligands were used to produce self-assembled one-dimensional arrays of zeolite L crystals. By intercalating zeolite crystals with different organic fluorophores (pyronine: green, oxonine: red), multicolor emitters can be obtained (see pict…
The synthesis and characterization of a series of anionic homobimetallic lanthanide complexes of the septadentate chelate 5-Me-HXTA (N,N-(2 hydroxy-5-methyl-1,3-xylylene)bis(N-(carboxymethyl)glycine) is described (Ln = Nd, Sm, Eu, Tb, Dy, Ho, Er, Yb). Single X-ray crystallography confirms that the complexes exist as d…
The 1S(h,e)-1P(e,h) exciton transition energy of PbSe nanocrystals was determined via two-photon photoluminescence excitation spectroscopy and was found to be in good agreement with predictions from a tight-binding calculation. The two-photon excitation peak occurs at energies very close to a strong feature in the one…
A mechanism is described that can alter the doping level of conducting polymers during normal electrical injection, which arises from differential charge extraction/ injection into transport sites, and which is likely to be an intrinsic feature of the hopping transport itself. This and not Joule heating is the cause o…
Studies of ordered, yet nonperiodic, metallic alloys known as quasicrystals have generated exciting questions and fundamental insights about the relationship between surface atomic structure and surface properties. In this review, I give examples from oxidation, friction, heterogeneous catalysis, and solid film growth…
The atomic-scale structure of nanosized “TiO 2 -type” materials of different morphologies, including particles, wires. and tubes, has been determined by total X-ray diffraction and atomic pair distribution function analysis. Atoms in dense-filled materials such as nanoparticles and nanowires are found to form a three-…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTUltralow Percolation Thresholds in Ternary Cocontinuous Polymer BlendsJianhong Zhang, Sepehr Ravati, Nick Virgilio, and Basil D. FavisView Author Information CREPEC, Department of Chemical Engineering, École Polytechnique de Montréa…
We have investigated photoluminescence (PL) from Sb-doped $p$-type ZnO films obtained by thermal oxidation of the Zn-Sb starting material. Very well resolved PL spectra were obtained from samples, with the hole concentration above $1\ifmmode\times\else\texttimes\fi{}{10}^{17}\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\…
Ultrathin multilayered films can be designed to release plasmid DNA for three months by using side-chain functionalized ‘charge-shifting' cationic polymers. Slow hydrolysis of the side chains of these polymers facilitates film disruption and release of DNA over periods longer than films fabricated using degradable cat…
Holey Prussian blue, Batman! A family of mesostructured Prussian blue analogues has been developed by a ligand-assisted templating approach in formamide. These new materials are composed of cyanide-linked metal centers organized around alkyl pyrazinium templates with lamellar, hexagonal (see idealized structural model…
Single-phase Ln4Ni3O8 (Ln = La, Nd) nickelates were synthesized and their crystal structures were determined by Rietveld refinement of powder neutron diffraction data. The crystal structures of these mixed-valent Ni1+/Ni2+ phases belong to the T'-type and are built by intergrowth of LnO2 fluorite layers with triple Ni…
The reaction of meso-triarylcorroles with AgNO2 proceeds with concomitant metalation and peripheral substitution to give the corresponding nitro-substituted silverIII corrole complex. The substitution is highly regioselective, giving only the corresponding 3-nitro derivative, among the different possible isomers. The…