Materials Literature
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Semisoft colloidal crystals, which are formed by the work of steric or excluded-volume interactions among the concentrated polymer brushes (CPBs) afforded on spherical particles, were studied with respect to their crystalline structure as a function of graft chain length, while the graft density was approximately fixe…
Investigations of chemical bonding and electronic structure features for polycrystalline (porphyrinato)nickel (II) (NiP, the simplest Ni porphyrin), (5,10,15,20-tetraphenylporphyrinato)nickel (II) (NiTPP) and (2-aza-21-carba-5,10,15,20-tetraphenylporphyrinato)nickel (II) (N-confused NiTPP, NiNCTPP) have been performed…
By using a new imaging technique for pairs of electrons emitted in coincidence from a surface, we investigated the two-electron photoemission from a Cu(111) surface in the energy range from $\ensuremath{\hbar}\ensuremath{\omega}=40\phantom{\rule{0.3em}{0ex}}\text{to}\phantom{\rule{0.3em}{0ex}}60\phantom{\rule{0.3em}{0…
Abstract The effect of organoclay loading and surface treatment on the dimensional stability, structure–property relationships, and rheological behavior of nanocomposites consisting of polycarbonate (PC), poly[butylene terephyhalate] (PBT), and nano‐clay was investigated at various clay loadings and with various surfa…
We investigate interface structure and adhesion behavior of incoherent metal/oxide interfaces with large misfit, $\mathrm{Cu}∕\mathrm{Mg}\mathrm{O}(001)$ and $\mathrm{Ni}∕\mathrm{Mg}\mathrm{O}(001)$, based on the density functional theory. We show that the interfacial strain and bonding characteristics are inhomogeneo…
The synthesis of octaazaphthalocyanine (AzaPc) derivatives, with bulky phenoxyl substituents placed at eight peripheral positions and containing either H(+), Ni(2+) or Zn(2+) ions in their central cavity, is described. The required precursors, derivatives of pyrazine-2,3-dicarbonitrile, were prepared using a nucleophi…
Solvothermal reaction between thiourea and an ionic cluster compound (denoted CMM-5) containing a cubic cadmium thiolate cluster ([Cd8(SPhF-3)14(DMF)6]2+) at 85 °C in a mixed acetone/H2O solvent converts the discrete cubic cluster into the covalently linked tetrahedral cluster that serves as tetrahedral node in a heli…
The synthesis and hyperpolarizabilities of a series of push−pull chromophores containing a bis-(4-methoxyphenyl) amine donor and efficient acceptor bridges with thiophene and ring-locked polyene are presented. The chromophores are readily soluble in common organic solvents and exhibit high thermal decomposition temper…
Abstract The effect of both sulfur and peroxide curing on the intercalation and exfoliation process of layered silicate was studied to find a suitable vulcanization package for acrylonitrile butadiene rubber. X‐ray diffraction and transmission electron microscopy studies showed that proper selection of a curing packag…
Dramatic reductions of the linewidths of well-known deep centers in $^{28}\mathrm{Si}$ reveal ``isotopic fingerprints'' of the constituents. The $\ensuremath{\sim}1014\text{ }\text{ }\mathrm{meV}$ Cu center, thought to be either a Cu pair or an isolated Cu, is shown to contain four Cu atoms, and the $\ensuremath{\sim}…
The application of viologen dications in the creation of highly sensitive and selective hot spots between silver nanoparticles is reported in the present work. A method to follow the existence of such hot spots in macroscopic samples is proposed based on the plasmon absorption of these nanoparticles in suspension. The…
Abstract Corpses of naturally died honeybees were used as a raw material for chitin isolation. Process of deproteinization of the powder made from clean bee corpses was carried out in the presence of 1 M NaOH at 80°C. Influence of time of alkaline treatment on the yield and molar mass of chitin was studied and optimal…
Surface fouling, i.e. the non-specific surface adhesion of proteins, bacteria and higher organisms, poses a severe problem in many areas ranging from modern diagnostic and therapeutic medical devices to food processing and food wrapping technology to corrosion prevention and marine technology. One approach to address…
Recently published data on polyelectrolyte complexes formed by both oppositely charged synthetic polyions and natural polyelectrolytes (proteins, enzymes, nucleic acids) are summarised. The properties of these complexes and the phase behaviour of their solutions is shown to obey the general trends found in the studies…
Abstract BACKGROUND: Biodegradable block copolymers have attracted particular attention in both fundamental and applied research because of their unique chain architecture, biodegradability and biocompatibility. Hence, biodegradable poly[(( R )‐3 ‐hydroxybutyrate)‐ block ‐( D , L ‐lactide)‐ block ‐(ε‐caprolactone)] (P…
Bis- and monoureas hybridized with the oligo(p-phenylene vinylene) (OPV) pi-electronic segment and 3,4,5-tridodecyloxyphenyl wedge were synthesized and their supramolecular polymerization in diluted solution, gel formation in concentrated solution, and liquid crystallinity in bulk state were investigated. Bisurea 1a f…
We evaluate Ferguson analysis as a method for simultaneously measuring the size and zeta-potential of gold nanoparticle-DNA (Au NP-DNA) conjugates. This approach is highly suitable when the particle size is <20 nm and biomolecular conformation results in a nonspherical or nonlinear conjugate, causing conventional dyna…
The fast degradation rates in the physiological environment constitute the main limitation for the applications of surgical magnesium alloys as biodegradable hard-tissue implants. In this work, a stable and dense hydrogenated amorphous silicon coating (a-Si:H) with desirable bioactivity is deposited on AZ91 magnesium…
Abstract Rigid polyurethane foams (RPUF) filled with various loadings of expandable graphite (EG) or/and hollow glass microspheres (HGM) were prepared by cast molding. The flame retardant properties of these composites were investigated by limiting oxygen index (LOI), horizontal and vertical burning tests. The composi…
Copper telluride (CuTe) is a transition metal chalcogenide with interesting electronic and photoelectric properties and potential applications. In this study, CuTe nanoribbons were successfully synthesized for the first time by an electrochemical method from an aqueous solution at 85 °C without using any template or c…