Materials Literature
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Water soluble spermine, spermine-naphthalimide, and pyridinium-substituted 1,8-naphthalimide derivatives have been synthesized as nucleotide-specific binding agents. Both mono- and bifunctionalized spermine compounds were studied. The photophysical properties of each compound were studied by using time-resolved and st…
The influence of the loop density of rib 1: 1 fabric preform made from GF-PP commingled yarn on the tensile properties of the composites is investigated. Six samples of rib 1: 1 fabric preform with different loop densities are studied. It has been found that the tensile strength of composites show an increase followed…
We investigate the stress–strain relationship and elastic stability of zinc-blende GaP, GaN, InP and BN lattices under hydrostatic pressure by first-principles calculation. A simple and direct ab initio implementation for studying the mechanical properties of cubic crystals is developed. The four phases' full-set stre…
We report the first direct observation of the formation process of an alumina nanowire (ANW) array from a porous anodic alumina (PAA) membrane employing a simple droplet etching method, not a general immersion etching method, using field emission scanning electron spectroscopy (FESEM). The PAA membrane is prepared by…
Nano- and microhydrogels were fabricated in water by first to third generation triethoxysilyl focal poly(amido amine) dendrons with hexyl spacer. The focal points of dendrimers were hydrolyzed and covalent-bonded through the simple sol-gel process at an acidic or basic catalytic condition. The growth of aggregates and…
Abstract In rolling contact fatigue, hydrogen is believed to contribute to early flaking failures under some conditions. Hydrogen diffuses quickly in steels, even at room temperature, thus resulting in its dissipation into the surrounding atmosphere. This condition presents a uniquely difficult challenge for evaluatin…
General distributions of relaxation times are discussed and then specialized to two types associated with Kohlrausch stretched-exponential temporal response, the K0 and K1 models. For the important choice of 1/3 for their beta shape parameters, their specific distributions and different temporal responses are first co…
In the past, the Callen–Callen (1965 Phys. Rev. 139 A455–71; 1966 J. Phys. Chem. Solids 27 1271–85) model has been highly successful in explaining the origin and temperature dependence of the magneto-crystalline anisotropy in many magnetic compounds. Yet, despite their high ordering temperatures of ∼650 K, the Callen–…
Ferroelectric ceramics of strontium bismuth tantalate, SrBi 2 Ta 2 O 9 (SBT), have been synthesized in pure layer-structured perovskite phase by two new soft chemical techniques, namely, a sol−gel process and a coprecipitation method. The sol−gel process utilizes ethylene glycol as solvent while the coprecipitation te…
This paper investigates the effect of mechanical deformation of a single-walled carbon nanotube (SWNT) on its reactivity with hydrogen and alkyl radicals. The influence of individual loading modes was explored with the aid of molecular dynamics simulation for deformation and quantum mechanics analysis for reaction. Th…
Low-temperature excitonic, electron–hole and interstitial-vacancy processes in LiF single crystals, Nakonechnyi, S, Kärner, T, Lushchik, A, Lushchik, Ch, Babin, V, Feldbach, E, Kudryavtseva, I, Liblik, P, Pung, L, Vasil’chenko, E
We have fabricated ordered arrays of nanoscale torsional actuators consisting of metal mirrors bonded to precisely oriented multiwall carbon nanotubes. The fabrication is facilitated by a new nanotube positioning method which employs localized electron beam activation of polymer residue on a silicon oxide surface.
A new iron–terpyridine complex based on a 3,5-diacylaminotoluene platform bearing two phenyl rings appended with aliphatic chains provides robust and transparent organo-gels and liquid-crystalline materials. The LC mesophase was characterized by small-angle X-ray diffraction, and is described as a columnar phase with…
Static magnetization for single crystals of insulating Nd0.85Pb0.15MnO3 and marginally conducting Nd0.70Pb0.30MnO3 has been studied around the ferromagnetic to paramagnetic transition temperature T-C. Results of measurements carried out in the critical range vertical bar(T - T-C)/T-C vertical bar <= 0.1 are reported.…
Tin doped indium oxide films (ITO) with embedded silver nanoparticles were prepared by a sol-gel spin coating method. Delafossite structure of tin doped AgInO2 was found at lower annealing temperatures in all compositions and decomposed into ITO and Ag as annealing temperatures were increased. The interconnected netwo…
By using combined QEXAFS/XRD (supported by measurements obtained using DSC, XRD, and IR spectroscopy), we have studied, in situ, the evolution of nanosized cobalt aluminate spinel (CoAl 2 O 4 ) particles from cobalt-ion-exchanged zeolite precursors. All of the cobalt-ion-exchanged zeolites were observed to first under…
Water-soluble CdSe nanoparticles with cubic phase and narrow photoluminescent emission have been synthesized in aqueous solution with the assistance of citric acid (CA) molecules by a microwave irradiation method. This synthesis process was so rapid that the CdSe nanoparticles were obtained within just a few minutes.…
Single crystals of Cf(IO(3))(3) (1) were synthesized by the hydrothermal reaction of CfCl(3) and H(5)IO(6), and the structure was determined with single-crystal X-ray diffraction. This structural determination of 1 represents the first for a trivalent californium compound containing oxygen coordination. This compound…
Dense/porous bi‐layered ceramic composites were fabricated in situ by freeze casting a ceramic/camphene slurry with a low solid content (φ=20 vol%). The warm slurry was prepared at 55°C by ball milling and cast into a mold at 25°C, where the top surface of the cast body was exposed to air to allow for the controlled e…
The magnetovolume effect of itinerant electron magnets is discussed by the explicit examination of the volume dependence of the spin fluctuation free energy. Magnetic Grüneisen parameters are introduced instead of magnetovolume coupling constants, that enable us to describe all the magnetovolume properties in terms of…