Materials Literature
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Abstract Homoleptic bismuth alkoxide complexes, Bi(OR) 3 [R = i Pr ( 1 ), t Bu ( 2 ), and CMe 2 i Pr ( 3 )], are used as catalysts in the ring‐opening polymerization (ROP) of lactides. In contrast to 1 , two bulkier bismuth alkoxides, 2 and 3, show high activity in the ROP of lactides in toluene at 75 °C. Notably, Bi…
Indium (In)-doped BiFeO3 (BFO) nanoparticles were prepared by an ethylene glycol based sol-gel method using the concept of aging for the formation of pure phase crystal structure. The x-ray diffraction patterns reveal the single phase rhombohedral structure for BFO and In-doped BFO nanoparticles and In substitution (0…
In the framework of continuum theory, we study magnetic field induced orientational transitions in a ferronematic, i.e., colloidal suspension of magnetic nanoparticles in a nematic liquid crystal. We consider a compensated ferronematic which is not magnetized in the absence of a field. The effect of finite coupling en…
The application of carbon nanotube (CNT) as a functional material to engineering and life sciences is advanced. In order to evaluate the cytotoxicity of CNT in vitro, some chemical and biological reagents are used for dispersants. In the present study, the cellular influences of six kinds of chemical or biological rea…
Abstract The linear viscoelastic behavior in dynamic shear and tensile creep at temperatures from −30 to 70 °C is measured for an styrene–butadiene rubber (SBR) elastomer cured with dicumyl peroxide to crosslinking densities between 0 and 23.5 × 10 −5 mol/cm 3 . The G ′, G ″, and tan δ isotherms are analyzed by time–t…
Abstract A method of electrochemical capacitance‐voltage profiling is used to characterize InGaN/GaN heterostructures with multiple quantum wells. Implementation of pulsed electrochemical etching allowed getting good planarity of etched surface despite of the high density of dislocations in GaN. The quality of etching…
16-Mercaptohexadecanoic acid (MHDA) and tripeptide glutathione conjugated with gold nanoparticles (Au-NPs) are characterized by Fourier Transform InfaRared (FTIR) spectroscopy combined with Surface-enhanced Raman scattering (SERS) spectroscopy. Surface Plasmon Resonance (SPR) technique based on FTIR spectroscopy has b…
The identification and quantification of biomarkers or proteins is a real challenge in allowing the early detection of diseases. The functionalization of the biosensor surface has to be properly designed to prevent nonspecific interactions and to detect the biomolecule of interest specifically. A multilayered nanoarch…
We report the measurements of the temperature variations of the flexoelastic coefficient (e(*)/K) of a host calamitic liquid crystal (RO) and its mixture with two guest bent-core (BC-120 and BC-60) liquid crystals. The bent-core (BC) molecules have different core structures and bend angles; namely, θ=/~120° and =/~60°…
ZrO2 samples with 7%, 9%, 11%, and 13% Gd doping have been prepared by co-precipitation route followed by high temperature sintering for potential application as high conductivity electrolytes in solid oxide fuel cells. The samples have been characterised by extended x-ray absorption fine structure (EXAFS) spectroscop…
We consider the entropy of polydisperse chains placed on a lattice. In particular, we study a model for equilibrium polymerization, where the polydispersity is determined by two activities, for internal and endpoint monomers of a chain. We solve the problem exactly on a Husimi lattice built with squares and with arbit…
Based on first-principles total-energy calculations, we studied the energetics and electronic structure of zigzag graphene nanoribbons with nanometer-scale corners. We found that the formation energy of a short zigzag edge with a 120${}^{\ensuremath{\circ}}$ corner is substantially smaller than that of a straight zigz…
The failure of implanted medical devices can be associated with changes in the production of cytokines by cells of the immune system. Cytokines released by peripheral blood mononuclear cells upon contact with metal particles were quantified to understand their role in implantation intergration and their importance as…
We investigate the magnetic interface states of graphene quantum dots that contain $p$-$n$ junctions. Within a tight-binding approach, we consider rectangular quantum dots in the presence of a perpendicular magnetic field containing $p$-$n$ as well as $p$-$n$-$p$ and $n$-$p$-$n$ junctions. The results show the interpl…
We investigate the intrinsic spin dynamics of electrons bound to Al impurities in bulk ZnO by optical spin noise spectroscopy. Spin noise spectroscopy enables us to investigate the longitudinal and transverse spin relaxation time with respect to nuclear and external magnetic fields in a single spectrum. On one hand, t…
(14)N nuclear quadrupole resonance frequencies have been measured in solid 2-pyridone, 3-hydroxypyridine, and 4-pyridone by (1)H-(14)N nuclear quadrupole double resonance. Two slightly nonequivalent nitrogen positions are observed in solid 3-hydroxypyridine, whereas only one nitrogen position has been observed in 2-py…
CuO is doped into (Na(0.5)K(0.5))NbO(3) (NKN) ceramics to improve the piezoelectric properties and thus obtain a piezoelectric transformer (PT) with high output power. In X-ray diffraction patterns, the diffraction angles of the CuO-doped NKN ceramics shift to lower values because of an expansion of the lattice volume…
Biodegradable synthetic polymers have attracted much attention nowadays, and more and more researches have been done on biodegradable polymers due to their excellent mechanical properties, biocompatibility, and biodegradability. In this work, hydroxyapatite (HA) particles were melt-mixing with poly (butylenes succinat…
This paper includes the results of an investigation of high-voltage pulse effects on insulators of a 10-kV power line. Experiments have been performed by means of equipment that simulates the simultaneous effect of a pulse disturbance and a power line operating voltage. Critical levels of insulator flashover have been…
A theoretical investigation of two-dimensional graphene-Cr-graphene intercalation nanostructures has been carried out using density functional theory (DFT) calculations. The intercalation nanostructures of interest are classified based on the atomic ratio of Cr with respect to C on two graphene layers, and we accordin…