Materials Literature
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In this study, with the aim to enhance the ionic conduction of known structures by defect chemistry, the La 2 O 3 -Ta 2 O 5 system was considered with a focus on the La 3 TaO 7 phase whose structure is of Weberite type. In order to predict possible preferential substitution sites and substitution elements, atomistic s…
A new reverse Monte Carlo (RMC) method has been developed for creating three-dimensional structures in agreement with small angle scattering data. Extensive tests, using computer generated quasi-experimental data for aggregation processes via constrained RMC and Langevin molecular dynamics, were performed. The softwar…
We have investigated the green band (GB) emission from vertically aligned ZnO nanowires (NWs) prepared by vapor−liquid−solid growth technique. At low temperatures, the GB emission consists of two sets of zero phonon lines and their phonon replicas independent of the laser excitation power. Temperature-dependent photol…
A series of (hyper)branched poly(glycolide) copolymers has been prepared by copolymerization of glycolide (GA) with 2,2-bis(hydroxymethyl)butyric acid (BHB) via combined ROP/AB 2 -polycondensation. Polymerization was conducted in bulk and catalyzed by stanneous-2-ethyl hexanoate (Sn(Oct) 2 ). The branched topology of…
We report a method that allows the facile synchronization of multiple photochromic dyes in a rigid polymer lens matrix together with large increases in their switching speeds. This was achieved by simple chromatographic fractionation of dye−poly(dimethylsiloxane) (PDMS) conjugates to provide tunable switching speeds w…
We report a computer simulation study of an electroneutral mixture of oppositely charged oblate ellipsoids of revolution with aspect ratio A=1/3. In contrast with hard or soft repulsive ellipsoids, which are purely nematic, this system exhibits a smectic-A phase in which charges of equal sign are counterintuitively pa…
High-energy x-ray and neutron diffraction measurements on polycrystalline La(2/3-x)Li(3x)TiO(3) (0.075 < x < 0.165) were performed. The total scattering structure factors were analysed by the reverse Monte Carlo (RMC) modelling technique, resulting in three-dimensional particle configurations. These configurations wer…
The layered compounds RbAg(2)TeS(6) and CsAg(2)TeS(6) crystallize in the noncentrosymmetric space group P6(3)cm, with a = 19.15 Å, c = 14.64 Å, and V = 4648 Å(3) and a = 19.41 Å, c = 14.84 Å, and V = 4839 Å(3), respectively. The structures are composed of neutral [Ag(2)TeS(3)] layers alternating with charge-balanced s…
In this study, we examined the orientational behavior of thermotropic liquid crystals (LCs) supported on a film of DNA that was chemically immobilized on a nanostructure surface. The surface was comprised of gold film deposited onto a polymer substrate that had a sinusoidal distortion normal to the surface, leading to…
This paper presents an analytical method for approximating the eddy current and hysteresis losses in a system of multiple sheathed cables placed in any configuration inside a steel pipe. The method is based on the theory of images, which this paper expands to apply to pipes having high magnetic permeability and high e…
We report on a new kind of green-emitting high silica luminous glass, which is fabricated by sintering of Ce(3+)-Tb(3+) co-doped porous glass. The spectra show that there are energy transfer between Ce(3+) and Tb(3+), and cross-relaxation between (5)D(3) and (5)D(4) energy level of Tb(3+). The energy transfer process…
We present a neutron-diffraction, small-angle scattering, and magnetometry study of the narrow bandwidth perovskite cobaltite ${\text{Pr}}_{1\ensuremath{-}x}{\text{Ca}}_{x}{\text{CoO}}_{3}$, demonstrating an unusual form of magnetoelectronic phase separation where long-range ordered ferromagnetism coexists spatially w…
Aulacoseira baicalensis (K. Meyer) Simonsen is a freshwater planktonic diatom that undergoes large seasonal changes in cell morphology related to changes in vertical mixing. Short cells (10–20 µm) with thin walls were formed under the ice of Lake Baikal but cell lengths increased up to 150 µm by the time mixing depth…
Antireflective surfaces composed of biomimetic sub-wavelength structures that employ the 'moth eye principle' for reflectance reduction are highly desirable in many optical applications such as solar cells, photodetectors and laser optics. We report an efficient approach for the fabrication of antireflective surfaces…
Abstract Electrospinning is a process to generate a nanofibrous material. Although the working principle of electrospinning is rather straight forward, it is influenced by many parameters. There is still a serious lack of knowledge concerning the influence of the ambient parameters, for which preliminary knowledge rev…
Nickel oxide (NiO) nanoflowers, prepared by thermal decomposition, exhibit anomalous magnetic properties far below the blocking temperature, i.e., a cusp in both the zero-field-cooled and field-cooled curves at about 21 K. Detailed characterization discloses that the individual NiO nanoflower consists of porous crysta…
Abstract In this work, long basalt fiber reinforced composites were investigated and compared with short basalt fiber reinforced compounds. The results show that long fiber reinforced thermoplastic composites are particularly advantageous in the respects of dynamic mechanical properties and injection molding shrinkage…
Abstract A novel method of developing cocontinuous morphology in 75/25 and 80/20 w / w polypropylene/high density polyethylene (PP/HDPE) blends in the presence of small amount (0.5 phr) of organoclay has been reported. SEM study indicated a reduction in average domain sizes ( D ) of disperse HDPE when PP, HDPE, and th…
An empirical evaluation of some critical aspects resulting from aggregation of gold nanorods (AuNRs) used as surface enhanced resonant Raman scattering (SERRS)-active substrates was reported. Two types of AuNR substrates with longitudinal plasmon bands which either match (in-plasmon resonance) or not (off-plasmon reso…
A theoretical model is developed for ferroelectric bilayers and multilayer heterostructures that employs a nonlinear Landau-Devonshire formalism coupled with a detailed analysis of the depolarizing fields arising from the polarization mismatch across interlayer interfaces and the electrical fields of localized space c…