Materials Literature
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The adsorption of [(Ca(2)Nb(3)O(10))(-)](n) (CNO) polyanionic nanosheets from their dilute colloidal suspensions onto gas-liquid interfaces with and without a cationic [N(CH(3))(2)(C(18)H(37))(2)](+) (DOA) surfactant film has been experimentally investigated. Our concern has been focused particularly on their dynamica…
Abstract The synthesis and micelle formation of methacrylate‐functionalized phosphate and phosphonate amphiphiles containing alkyl spacers of eight and eleven CH 2 groups is studied. The CMC of these molecules in aqueous solutions was investigated by DLS and conductometry. The CMCs were dependent on the polarity of th…
POSS-functionalized polyisobutylenes (PIBs) were synthesized by carbocationic polymerization using an epoxy-POSS/TiCl(4) initiating system in hexane/methyl chloride (60:40 v/v) solvent mixture at -80 °C. (1) H NMR spectroscopy verified the incorporation of one epoxy-POSS per polymer chain. Light scattering and TEM ana…
Abstract Alternating copolymers of maleimides containing pyrenyl and alkynylpyrenyl moieties with isobutene (IB) were synthesized as a new class of heat‐resistant and fluorescent polymers. N ‐(1‐Pyrenyl)maleimide (1) and N ‐[4‐(1‐pyrenylethynyl)phenyl]maleimide (2) were copolymerized with IB in the presence and absenc…
In this work we analyze the potential role of quasicrystals and related alloys in thermoelectric material research. Relatively large figure of merit values are expected for those samples exhibiting two properly located narrow features in the density of states close to the Fermi level. It is expected that optimized qua…
The effects of two seeds on the melt crystallization of isotactic polypropylene were experimentally investigated. The seed, which has the flat surface full of a nonuniform size distribution, has provided a right surface pattern to activate effectively the heterogeneous nucleation. In contrast, the seed, which has the…
Neutron protein crystallography is expected to yield a more precise understanding of the protein structure by visualizing hydrogen atoms and hydration water molecules. However, relatively few protein structures have been analyzed by neutron diffraction, in part because very large crystals of the target proteins are re…
We present a framework to calculate the thermal resistance of Au–Sn eutectic solder joint$(R_{\rm th, Au\mathchar"707B Sn\,joint})$in high brightness light emitting diode (HB LED) packages whose heat extraction capability controls the optical efficiency and reliability of HB LEDs. Using the transient thermal measureme…
Periodic mesoporous organosilicas (PMOs), a relatively new class of mesostructured organic−inorganic hybrid materials already thoroughly characterized as it concerns acidic sites, are studied in the present paper from the viewpoint of electron-rich, potentially basic sites. Iodine was adopted as a probe molecule, as i…
Abstract The shape‐memory polymer performance of urethane foams compressed under a variety of conditions was characterized. The foams were water‐blown thermosets with a closed‐cell structure and ranged in density from about 0.25 to 0.75 g/cm 3 . Compressive deformations were carried out over a range of strain levels,…
Superconducting tantalum disulfide nanowires have been synthesised by surface-assisted chemical vapour transport (SACVT) methods and their crystal structure, morphology and stoichiometry studied by powder X-ray diffraction (PXD), scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDX), transmission…
We designed a low-loss double-negative composite metamaterial that operates at the millimeter-wave regime. A negative passband with a peak transmission value of -2.7 dB was obtained experimentally at 100 GHz. We performed transmission-based qualitative effective medium theory analysis numerically and experimentally to…
Protein adsorption plays a crucial role in bioactive implant devices and drug delivery materials design. Ionic complementary peptides are novel nanobiomaterials with many biomedical applications. In this work, molecular dynamics simulations of the ionic complementary peptide EAK16-II on the hydrophobic HOPG surface we…
Mixtures of nonadsorbing polymer and colloidal particles exhibit a range of different morphologies depending on the particle and polymer concentrations and their relative size ratios. These can be very important for technological applications, where gelation can produce a weak solidlike structure that can help reduce…
In this Brief report we propose a direct method of effective-parameters restoration that is based on the wave propagation phenomenon. It is easy in implementation, has no unambiguity in retrieving effective properties and is applicable to thick metamaterial (MTM) slabs. The method is validated on the case studies of f…
Phenyleneethynylene-based and thienyleneethynylene-based π-conjugated polymers with imidazolium cationic units in the main chain and their model compounds were synthesized and characterized. The imidazolium-containing cationic polymers were transferred to an ionic liquid by the spontaneous anion-exchange from iodide t…
Abstract Two different series of polymer dispersed liquid crystal (PDLC) films were prepared for their future use as externally controlled electrolytes in direct methanol fuel cells (DMFC). The liquid crystals used in this work were commercial cholesteryl oleyl carbonate (COC) and n ‐(4‐methoxybencylidine)‐4‐butylanil…
Abstract This work reported the hydrophilicity, hemocompatibility, and cytotoxicity of novel polyurethane (PU) scaffolds for tissue engineering, especially the hydrolysis effect of a soft‐segmented component, a hydrolytically‐modified hydroxyl‐terminated poly(butadiene‐ co ‐acrylonitrile) ( h ‐HTBN), on these properti…
As the simplest stable boron hydride in its condensed phase, diborane exhibits an interesting structural chemistry with uniquely bridged hydrogen bonds. Here we report the first room-temperature infrared (IR) absorption spectra of solid diborane compressed to pressures as high as 50 GPa using a diamond anvil cell. At…
Abstract The basic problem of weak interaction between odd electrons in graphene is considered within the framework of broken spin‐symmetry single‐determinant approach. The modern implementations of the approach in the form of either unrestricted Hartree‐Fock scheme (UBS HF) or spin‐polarized DFT (UBS DFT) were discus…