Materials Literature
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The average, spontaneous (zero field) structure of the polar nanoregions (PNRs) in a single crystal specimen of the relaxor ferroelectric 0.72Pb(Mg1∕3Nb2∕3)O3–0.28PbTiO3 has been characterized above Tm by partially coherent x-ray diffraction. At these temperatures, the PNRs are randomly distributed within the crystal…
Abstract The grafting of the methyl methacrylate (MMA) monomer onto natural rubber (NR) was carried out by supercritical carbon dioxide (scCO 2 ) swelling polymerization with benzoyl peroxide (BPO) as an initiator. Fourier transform–infrared spectroscopy (FT–IR) was used to confirm the formation of graft copolymers wi…
Hysteresis torque is analysed in a high-speed induction machine where the rotor is solid and made of a semihard magnetic material. The hysteresis torque is investigated at first with no load and experimental and numerical methods are considered. The analysis of hysteresis torque is then extended to rated conditions. T…
We report a systematic study on Na x CoO 2 (0.3≤ x ≤0.72) using angle-resolved photoemission spectroscopy (ARPES), with a focus on the Fermi surface topology of the metallic samples. Within this doping range, we observed only one large hexagonal Fermi surface around the Γ-point, which comes from the a 1g band. Contrar…
The quality of a SrTiO3 tunnel barrier deposited by pulsed laser deposition on SrTiO3 (001)‖Sr2FeMoO6 is investigated. Epitaxy and two-dimensional growth are obtained and the root-mean-square roughness is 0.3nm. The distribution of the local current measured by conductive atomic force microscopy indicates that hot spo…
Extensive structural and magnetic analyses of Hf1−xCoxO2 thin films grown by molecular beam epitaxy are reported. Nearly cobalt cluster-free film with x=0.04–0.1 was obtained via 100°C growth, and Co ions are inferred to be located at interstitial site. Ferromagnetic behavior was observed up to 300K in both magnetizat…
Broadband Brillouin scattering of Sr0.61Ba0.39Nb2O6 uniaxial ferroelectric relaxors has been investigated. One broader central peak (CP) appeared at all temperatures and was ascribed to light-induced charge carriers, while the other narrower CP began to appear near the Burns temperature suggesting its origin from the…
Abstract By using a commercial β‐nucleating agent (TMB‐5) for polypropylene (PP), it was observed that high β‐crystal content in a compatibilized blend of polypropylene/polyamide‐6 (labeled as Blend‐03 in this work) can be achieved for samples prepared by compression moulding. As β‐PP possesses more superior impact st…
A new non-aggregating and electrochromic manganese(3+) phthalocyanine, (acetato)[2(3),9(10),16(17),23(24)-tetrakis(4-(1-naphthoxy-4-sulfonic acid sodium salt))phthalocyaninato]manganese(3+) [NhtMn(3+)PcL] (where Nht and L indicate naphthoxy-4-sulfonic acid sodium salt and acetate ion, respectively), was synthesized by…
The authors have demonstrated stimulated emission from polymer-based planar waveguide doped with Eu–Al nanoclusters under continuous-wave optical pumping. For the waveguide sample with a nanocluster concentration of 5.0wt%, amplified spontaneous emission was observed in the spectra of the light decoupled from the wave…
Abstract The cover picture of the current issue depicts a selection of luminescence colours of zinc oxide and relates to the Review Article by Claus Klingshirn (University of Karlsruhe) [1]. Zinc oxide is a wide band gap semiconductor which shows intrinsic luminescence in the blue and near‐UV spectral range as well as…
The velocity auto-correlation (VAC) function of liquid argon in the Green-Kubo formula decays quickly within 5 ps to give a well-defined diffusion coefficient because the velocity is the property of each individual particle, whereas the stress (SAC) and heat-flux auto-correlation (HFAC) functions for shear viscosity a…
This work investigates the photoluminescence properties of Zn1−xMgxO–ZnO single quantum wells, which have been fabricated by molecular-beam epitaxy. With increasing temperature from 13to300K the single quantum well-related emission peaks exhibit an irregular S-shaped (redshift-blueshift-redshift) behavior, which is in…
The ageing quantification of ultracapacitors in cycle-life tests has been studied. Current profiles and the characteristics of the ultracapacitors used in hybrid and electric vehicle applications are specified and validated. With these profiles, significant self-heating occurs but without exceeding the manufacturers&a…
Magnetstreifen: Magnetische {Mn3IIIO}-Einheiten wurden in zweierlei Weise – mit verbrückenden Formiat- oder Azidionen – entlang der magnetischen Vorzugsrichtung zu Ketten aufgereiht (siehe Bild). Die verstärkte gerichtete Anisotropie und Kopplung innerhalb der Ketten charakterisieren die Verbindungen als Einzelkettenm…
Abstract Novel self‐assembled nano/microstructured conducting PANICN was prepared by in situ intercalative emulsion polymerization of aniline in aqueous dispersion of clay using bifunctional amphiphilic dopant, 3‐pentadecyl phenol‐4‐sulphonic acid (PDPSA) derivable from renewable resource. X‐ray diffraction and scanni…
C F 4 -based plasma has been employed to in-flight etch silicon nanocrystals (Si-NCs) after they are synthesized by SiH4-based plasma. The authors find that the photoluminescence (PL) of Si-NCs blueshifts when they are etched, indicating the etching-induced size reduction of Si-NCs. It is demonstrated that the power o…
Abstract Monomethoxy poly(ethylene glycol)‐b‐poly( ε ‐caprolactone)(MPEG‐b‐PCL) diblock copolymers were synthesized via a ring‐opening polymerization. The polymeric nanoparticles prepared by precipitation/solvent evaporation exhibit a core–shell structure, characterized by dynamic light scattering (DLS), nuclear magne…
Insider: Bei der Bildung eines supramolekularen Hydrogels in einer Zelle entstehen Nanostrukturen (siehe Bild), die das Schicksal von Bakterien beeinflussen. Die enzymgesteuerte Selbstorganisation niedermolekularer Vorstufen könnte zur Regulierung zellulärer Prozesse, zum Verständnis der Zellfunktionen und zur Entwick…
Programmed cell death (apoptosis) is a genetically regulated process of cell elimination essential during development. During development, programmed cell death is involved in the specific shaping of organs, in the elimination of cells having achieved their program, and in regulating the number of cells to differentia…