Materials Literature
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This minireview aims to demonstrate that (i) natural nanotubes play important roles in chemical signaling and (ii) they represent one of the deep functional similarities between neural and immune synapses. We also pay attention to the related receptor assemblies and possibilities of chemically synthesized carbon nanot…
Abstract Polarized Raman and IR spectra of a PbB 4 O 7 single crystal were measured. The obtained spectra are discussed within the factor group approach for the orthorhombic P 2 1 nm ( C 2 v 7 ) space group with Z = 2 assuming that the crystal structure is built up of the (B 4 O 7 ) ∞ 2− framework and Pb 2+ ions. It h…
Abstract Raman spectral mapping of thin organic layers on metal substrates is an important analytical tool to characterize these systems. Surface‐enhanced Raman scattering (SERS) spectroscopy is a suitable technique for analysis of such layers. Development of new SERS‐active surfaces with repeatable properties and wit…
We demonstrated in this study that the electrostatic interaction between nanocrystals (NCs) and polymers was dominant in the photophysical properties of their composites. This effect became more pronounced under illumination and in the presence of the carbazole moieties. The mechanism in which carbazole moieties influ…
In this study, we have investigated the interaction of cation-encapsulated single-walled carbon nanotubes M@SWNT(M = H +, Li +, Na + ) with small polar molecules (HF, H 2 O, CH 3 OH, CH 3 SH). The calculations reveal that in the case of H 2 O and CH 3 OH their complexes with M@SWNT are more stable than those without i…
A theoretical approach to the analysis of magnetostructural phase transitions of chain polymeric heterospin complexes is suggested. The approach is based on a model of the spin-Peierls transition in chains of exchange clusters. The chain elasticity parameter is found to be a main factor determining the order of phase…
A photonic crystal (PC) light-emitting diode (LED) was fabricated using an anodized aluminum oxide (AAO) nano-pattern technique, which has potential applications to mass production. The AAO nano-pattern, which was anodized in 0.3-M oxalic acid at 70 V, was transferred to the n-GaN bottom cladding through reactive ion…
Abstract The morphology of nonisothermally crystallized poly(phenylene sulfide) (PPS) and its blend with poly (ether ether ketone) (PEEK) have been observed by polarized optical microscope (POM) equipped with a hot stage. The nonisothermal crystallization behavior of PPS and PEEK/PPS blend has also been investigated b…
The synthesis and spectral characterization of three grafted poly( p- phenyleneethynylene)s (PPE) are reported. These polymers contain identical chromophores/fluorophores yet show different absorption and emission spectra in DMF and DMF−water mixtures. While some of the spectral properties of the PPEs are similar to t…
Two sulfonated poly(sulphone) sodium salts (SPSF) with different molecular weights and ionic exchange capacities in a N,N-dimethyl formamide/water (DMF-H2O) mixed solvent with various DMF contents were selected as a model system for investigating the influences of solvent composition, solution properties, and charge d…
The present paper describes diffusivities of a series of metal complexes inside of silica-surfactant nanochannels (channel diameter = 3.4 nm), which were formed within a porous alumina membrane by a surfactant-templated method using cetyltrimethylammonium bromide (CTAB) as a template surfactant. The metal complexes us…
Abstract The carbon materials prepared from polyimide (PI) resin film were investigated by TG‐DTG, X‐ray powder diffraction (XRD), and X‐ray photoelectron spectroscopy (XPS) analysis. TG‐DTG study revealed that the weight loss of PI resin film during carbonization occurred in three stages, and the most serious changes…
Ga-doped ZnS nanowires are used as precursors for the preparation of ZnO/ZnGa2O4 composite nanotubes, as shown in the figure. Oxidation of the nanowires induces phase separation resulting in the formation of ZnO/ZnGa2O4 phosphor heterostructures. The nanowires essentially serve as both precursors and templates for the…
Abstract Polysiloxane–polyester copolymers have been synthesized for the first time by direct polycondensation of a series of diacids (butanedioic, hexanedioic, and octanedioic acid) and α,ω‐bis(3‐hydroxypropyl) polydimethylsiloxanes catalyzed with Novozyme‐435 in high yields (>90%) without the cleavage of SiO bon…
Abstract The effects of mechanical mixing and filler–filler (F–F) and polymer–filler (P–F) interactions on the normalized state of a filler microdispersion [ d ( x )] and the viscoelastic properties of silica‐filled rubbers were studied. The rubbers were prepared with or without the addition of n ‐octyl‐triethoxysilan…
Abstract Experimental results are discussed which deal with metallic conductivity in partially conjugated and undoped polyamidine thin films placed between metallic electrodes. In the framework of a model, the electrification effect due to metallic electrodes plays the significant role in obtaining metallic conductivi…
We first report a simple and rapid electrochemical approach to synthesize novel nanofiber junctions and dendrites of conducting poly(o-phenylenediamine) without any surfactant or template. Through controlling some parameters such as the time and potential of electrodeposition and concentration of the reactant, nanofib…
Abstract The free‐radical grafting of the multimonomer system of pentaerythritol triacrylate (PETA) and styrene (St) onto polypropylene (PP) in the melt state was studied by reactive extrusion. The effects of the St and initiator concentrations on the grafting reaction were investigated by means of the melt flow rate,…
The nature of coupling among the L10 FePt hard and FexB (x=2,3) soft magnetic phases in FePtB nanocomposite thin film magnets is investigated by measuring the hysteresis loops and δM (Henkel) plots. The FePtB thin films deposited under optimized sputtering conditions are shown to have almost fully exchange-coupled sof…
Two types of mercury selenide nanostructures, nanotowers and nanoscale dendrites, have been created with good control and high yield by a solution–liquid–solid process. Alternating twinned structures have been achieved in both the nanotowers and the nanodendrites, which originate from self-oscillations of local reacti…