Materials Literature
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A single-step synthesis route is described for the preparation of a metal-polymer composite in which palladium acetate and meta-amino benzoic acid were used as the precursors for palladium nanoparticles and poly(meta-amino benzoic acid) (PABA). The palladium nanoparticles were found to be uniformly dispersed and highl…
We synthesized novel fluorescent magnetic silica nanoparticles (FMSNPs) containing large magnetic components for biomedical application. By employing assemblies of magnetic nanoparticles as kernels against FMSNPs, both the saturation of magnetization and the magnetic resonance (MR) signal intensity were significantly…
We investigate the electronic properties of individual C(60) nanowhiskers by exploiting conductive atomic force microscopy at room temperature in ambient atmosphere. The pristine individual C(60) nanowhiskers exhibit conducting behavior. The outer C(60) oxide covering, confirmed by Auger electron spectroscopy, shelter…
The effect of Nd and Co substitution on magnetic entropy changes and hysteresis losses has been investigated for the cubic NaZn13-type LaFe13−xSix compounds. Partially replacing La with Nd leads to a decrease of the Curie temperature TC and an increase of the magnetic entropy change ΔS. Substitution of Co for Fe in La…
The electronic and geometrical structures of Al7N- are investigated using photoelectron spectroscopy and ab initio calculations. Photoelectron spectra of Al7N- have been obtained at three photon energies with six resolved spectral features at 193 nm. The spectral features of Al7N- are relatively broad, in particular f…
Attaching electron-rich 1,3-dithiol-2-ylidene moieties to polynitrofluorene electron acceptors leads to the formation of highly conjugated compounds 6 to 11, which combine high electron affinity with a pronounced intramolecular charge transfer (ICT) that is manifested as an intense absorption band in their visible spe…
Liquid crystals are intriguing electrically responsive soft matter systems. We report previously unexplored field-induced changes in the structures of some frustrated liquid crystal phases and describe them theoretically. Specifically, we have discovered using resonant x-ray scattering that the four-layer intermediate…
The specific heat of La0.4Ca0.6MnO3 in bulk and nanoparticle (∼60nm in grain size) forms was investigated. It is found that the charge-ordered state highly stabilized in the bulk samples can be significantly suppressed in the nanoparticle. The low temperature specific heat data reveal a Schottky-like anomaly at ∼5K fo…
A facile, solvent-free, low-level noncovalent method for the modification of single-wall carbon nanotubes (SWNTs) by tertiary phosphines is described. The modified SWNTs show greater ease of exfoliation into common organic solvents (such as dichloromethane, dimethylformamide, ethanol, and 1,2-dichlorobenzene) than unm…
Zinc oxide under biaxial inplane tensile strains is studied theoretically by first-principles density functional calculations. Different material properties (including structural response of cell shape, chemical bonding, total-energy curvature, electrical polarization, Born effective charge, electronic band dispersion…
The aim of the present research is to provide insights into the sorption behavior and degradation mechanisms of a unidirectional pultruded E-glass/vinylester composite subjected to synergistic hygrothermal exposure and sustained bending strain for exposure times of up to 2 years. Composite specimens were found to foll…
We use orientational-bias Monte Carlo simulations to examine the phase behavior of two-dimensional hard rectangles in the bulk and under confinement by hard walls. For all of the rod aspect ratios and area fractions studied, we find that confinement increases the degree of nematic ordering over the bulk, as confined r…
Fibers obtained from the fronds of betel or betel nut ( Areca catechu) palm (or known in Malaysia as pinang tree) were used as woven reinforcement in unsaturated polyester resin. The morphology, physical and mechanical properties of the natural fibers and resulting woven composites were evaluated. Woven betel palm com…
A parallel array of isolated metal nanowires is expected to be hydrophilic. We show, however, that a clustering of such nanowires brought about by vacuum drying produces a 'dual-scale roughness' and confers a strongly hydrophobic property to the surface. The mean size of the nanowire clusters as well as the contact an…
The synthesis of ZnO:Co nanorods in alcoholic solutions and their structural, optical, and magnetic properties are presented. One-dimensional growth is achieved by careful control over the precursor addition and with the aid of ethylene diamine as a ligand. The nanorods are single-crystalline and show growth into the…
A polymerizable benzoic acid derivative, 3,5-bis(propenoyloxymethyl)-4- hexadecyloxybenzoic acid ( 1 ), was synthesized and complexed in a molar ratio of 2:1 with each of the dipyridyl compounds 4,4′-bipyridyl ( 2a ), 1,2-dipyridylethane ( 2b ), 1,2-dipyridylethene ( 2c ), and 1,3-dipyridylpropane ( 2d ). All of these…
A versatile and straightforward approach for the design and development of structure–activity studies into bent-core liquid crystals has been investigated. Through a broad selection of carboxylic acids linked to hydrogen acceptors through hydrogen bonds, structural modifications have been made in terms of length, chir…
Using first-principles calculation, we have investigated the structural and mechanical properties of the cubic $(c)\text{\ensuremath{-}}\mathrm{B}\mathrm{N}∕{\mathrm{C}}_{2}$ alloy systems, which are currently considered as strong candidates for superhard materials. We show that there is a sublinear dependence of the…
The first example of a microcrystalline powder of a synthetic low-spin (LS) mononuclear Fe(III)(OOH) intermediate has been obtained by the precipitation of the [Fe(III)(L(5) (2))(OOH)](2+) complex at low temperature. The high purity of this thermally unstable powder is revealed by magnetic susceptibility measurements.…
The collective behaviour of statistical systems close to critical points is characterized by an extremely slow dynamics which, in the thermodynamic limit, eventually prevents them from relaxing to an equilibrium state after a change in the thermodynamic control parameters. The non-equilibrium evolution following this…