Materials Literature
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Textured Bi-substituted Ca2Co2O5 ceramics have been prepared using a coprecipitation method combined with spark plasma sintering. The Bi substitution is effective in increasing the grain orientation of the Ca2Co2O5-based ceramics (from 0.46 to 0.85). Electrical conductivity increases obviously with partial substitutio…
We investigated and compared the photoelectric behavior of the Pt sandwiched (Bi3.7Nd0.3)Ti3O12 (BNT) and Pb(Zr0.2Ti0.8)O3 (PZT) films deposited by sol-gel method. Based on the analysis of the photocurrent and I-V characteristics, the top and bottom Pt/film interface Schottky barriers are found to be more symmetric in…
Die Schichtmorphologie von etwa 2.2 nm dicken und bis zu 4 μm breiten einkristallinen Ceroxidnanoblättern (siehe Bild) entsteht durch zweidimensionale Selbstorganisation anfänglich gebildeter CeO2-Nanokristalle und nachfolgende Umkristallisation. Die geringe Dicke der Nanoblätter führt zu Größenquantelungseffekten und…
Resistivity measurements show that SrTiO3/LaTiO3/SrTiO3 heterostructures remain metallic even for single unit cell LaTiO3 layers. Hall resistances of all heterostructures are nonlinear functions of the applied field. The Hall data is analyzed in terms of a two-layer model, indicating that a low-mobility layer exists a…
Abstract Praseodymia gives rise to a rich phase diagram with a large number of phases between the limiting stoichiometries Pr 2 O 3 and PrO 2 that differ only slightly in oxygen content (Pr n O 2 n −2 ). This chemical and crystallographic variability allows the system to release or incorporate lattice oxygen easily at…
Abstract The dielectric properties of CuInP 2 S 6 and Ag 0.1 Cu 0.9 InP 2 S 6 crystals were investigated in wide frequency (20 Hz–3 GHz) and temperature ranges (25–360 K). The low frequencies dielectric spectra at high temperatures are highly influenced by the high ionic conductivity. The temperature dependences of th…
The objective of this research was to use Ar/N 2 (50%:50%) plasma to increase the adhesion of nano silver particles to raw polyester fabric. RUCO-BAC AGP was applied using the exhaust method. X-ray photoelectron spectroscopy revealed differences in surface composition between the Ar/N 2 plasma-treated and untreated ra…
We report dissipative particle dynamics (DPD) simulations of a polyelectrolyte brush under athermal solvent conditions. The electrostatic interactions are calculated using the particle-particle particle-mesh (PPPM) method with charges distributed over the particles. The polymer beads, counterions, co-ions, and solvent…
Exchange anisotropy has been observed and investigated in single-crystalline CuO nanowires grown by thermal oxidation of Cu. The exchange bias field decreases by increasing temperature and can be tuned by the strength of the cooling field. A training effect has also been observed. The obtained results can be understoo…
Two photochromic diarylethenes blocked by alkyl bridges in an ideal conformation for photocyclization are studied by stationary and femtosecond transient spectroscopy in order to depict the photocyclization processes: the bistable 1,2-dicyano[2.n]metacyclophan-1-ene with n = 2, abbreviated as [2.2], and its non-bistab…
An efficient electromagnetic shielding composite based on multiwalled carbon nanotubes (MWCNTs)-filled styrene acrylic emulsion-based polymer has been prepared in a water-based system. The MWCNTs were demonstrated to have an effect on the dielectric constants, which effectively enhance electromagnetic shielding effici…
In this work we present a systematic experimental and theoretical study of the structural, transport, and superconducting properties of $\text{Sm}({\text{Fe}}_{1\ensuremath{-}x}{\text{Ru}}_{x})\text{As}({\text{O}}_{0.85}{\text{F}}_{0.15})$ polycrystalline samples as a function of Ru content $(x)$ ranging from 0 to 1.…
The piezoelectric activity in [001] poled Pb(In(12)Nb(12))O(3)-Pb(Mg(13)Nb(23))O(3)-PbTiO(3) crystals was investigated as a function of composition and temperature. The level of intrinsic andor extrinsic contribution to the total piezoelectric activity was analyzed using Rayleigh method. The results revealed that thou…
The lowest-energy configurations of ${\text{C}}_{n}(n\ensuremath{\le}55)$ clusters are obtained using the energy-minimization technique with the conjugate gradient method where a modified Brenner potential is invoked to describe the carbon and hydrocarbon interaction. We found that the ground-state configuration consi…
The in-plane London penetration depth, $\ensuremath{\lambda}(T)$, was measured in single crystals of the iron-chalcogenide superconductors ${\text{Fe}}_{1.03}({\text{Te}}_{0.63}{\text{Se}}_{0.37})$ and ${\text{Fe}}_{1.06}({\text{Te}}_{0.88}{\text{S}}_{0.14})$ by using a radio-frequency tunnel diode resonator. Similar…
In situ studies of strain-induced crystallization in unfilled and multiwalled carbon nanotube (MWCNT)-filled natural rubber (NR) were carried out by using synchrotron wide-angle X-ray diffraction (WAXD). Synchrotron WAXD results indicate that more nuclei appear in the MWCNT-filled NR sample, leading to higher crystall…
Many properties of dopants have been investigated to explore the key factor that influenced the CO oxidation activity of M-doped ceria (CeM). Nevertheless, these reports were controversial. Herein, the Pauling electronegativity (χ P ) of the M was presented as a convenient guide to screen a proper dopant for ceria. Ki…
In order to investigate band gap tunability in polar oxides, we measured the optical properties of a series of Bi(Fe1−xMnx)O3 thin films. The absorption response of the mixed metal solid solutions is approximately a linear combination of the characteristics of the two end members, a result that demonstrates straightfo…
BACKGROUND: Nanomaterials are extensively used in industry and daily life, but little is known about possible health effects. An intensified research regarding toxicity of nanomaterials is urgently needed. Several studies have demonstrated that nanoparticles (NPs; diameter < 100 nm) can be transported to the central n…
Formation of ferroelastic twin domains in vanadium dioxide (VO(2)) nanosystems can strongly affect local strain distributions, and hence couple to the strain-controlled metal-insulator transition. Here we report polarized-light optical and scanning microwave microscopy studies of interrelated ferroelastic and metal-in…