Materials Literature
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The electronic stability of (001) and (110) surfaces of La2/3Ca1/3MnO3 (LCMO) capped with nanometric SrTiO3 (STO) layers in epitaxial heterostructures is addressed by (S)TEM electron energy loss spectroscopy. It is found that growth of STO on (001)LCMO promotes a significant electron doping of LCMO that extends a few…
Hall effect and magnetoresistance measurements were carried out on a single-phase polycrystalline sample of the type-I clathrate Ba${}_{8}$Ge${}_{43}$\ensuremath{\square}${}_{3}$ in the 2--350 K temperature range. These experiments were complemented by electronic band structure and Fermi surface calculations performed…
Glutamine synthetase (GS) activity in Escherichia coli is regulated by reversible adenylylation, brought about by a bicyclic system comprised of uridylyltransferase/uridylyl-removing enzyme (UTase/UR), its substrate, PII, adenylyltransferase (ATase), and its substrate, GS. The modified and unmodified forms of PII prod…
We use depth- and time-resolved x-ray diffraction to study thermal transport across single crystal Bi films grown on sapphire in order to determine the thermal conductivity of the film and the Kapitza conductance of the interface. Ultrafast Ti:sapphire laser pulses were used to heat the films; x-ray diffraction then m…
Pyroelectric properties of rhombohedral and tetragonal single crystals Pb(In1/2Nb1/2)-Pb(Mg1/3Nb2/3)-PbTiO3 (PIN-PMN-PT) were investigated, with temperature from −100 °C to 100 °C. At room temperature, the pyroelectric coefficient p and the figure of merit Fd of rhombohedral crystals are 7.81 × 10−4 C/m2 K and 10.9 ×…
Heterostructure composed of electron-doped high-Tc superconductor La1.89Ce0.11CuO4 (LCCO), ferroelectric Ba0.5Sr0.5TiO3 (BST) and colossal magnetoresistance (CMR) La0.67Sr0.33MnO3 (LSMO) thin films were deposited on the (001) SrTiO3 (STO) substrate by pulsed laser deposition method. The current-voltage measurement sho…
Gut kombiniert: Aus dimeren Iridium(III)-Lumiphoren mit Tetraacetylethan-Brücken wurden flüssigkristalline Materialien erhalten, die hohe Photolumineszenzquantenausbeuten zeigten (siehe Bild). Nach dem gleichen Prinzip konnten auch heteronukleare lumineszierende Iridium(III)-Platinum(II)-Dyaden erhalten werden.
Uniform ordered configurations of minority motifs in a two-dimensional square lattice are investigated as a function of composition. The problem of their general classification is reconsidered using as complementary guiding principles the main features of the simpler problem in one dimension: an effective repulsive in…
UNLABELLED: NoRSE was developed to analyze high-frequency datasets collected from multistate, dynamic experiments, such as molecular adsorption and desorption onto carbon nanotubes. As technology improves sampling frequency, these stochastic datasets become increasingly large with faster dynamic events. More efficient…
The tetragonal tungsten bronze (TTB) structure multiferroic fluoride K 0.58 FeF 3 (alternatively K 3– x Fe 5 F 15 ( x ≈ 0.1)) has been studied using variable temperature high-resolution synchrotron powder X-ray diffraction. The as-made sample occurs as a mixture of two closely related TTB phases, one tetragonal ( a TT…
We report the electrical, magnetotransport, and specific heat of the layered polycrystalline RECoPO (RE = La, Nd, and Sm) samples. These compounds are iso-structural to recently discovered superconductor LaFeAs(O/F). Bulk polycrystalline samples are synthesized by a solid state reaction route in an evacuated sealed qu…
HoAl2 undergoes a first order spin reorientation transition at 20 K, which is accompanied by a sharp peak in the heat capacity data. Here, we have explored the effect of Dy doping on the spin reorientation transitions in Ho1-xDyxAl2 alloys by heat capacity measurements. The first order spin reorientation transition in…
Until now, the quasiamorphous (QA) phase in ${\text{BaTiO}}_{3}$ (BTO), ${\text{SrTiO}}_{3}$ (STO), and ${\text{BaZrO}}_{3}$ was achieved by pulling a thick film through a steep temperature gradient. Here, we show that a room-temperature deposited ultrathin film, subsequently annealed in ${\text{O}}_{2}$ can also prod…
This paper discusses the electrical conduction mechanisms in a 0.88 Bi0.5Na0.5TiO3-0.08 Bi0.5K0.5TiO3-0.04 BaTiO3 thin film in the temperature range of 200-350 K. The film was deposited on a SrRuO3/SrTiO3 substrate by pulsed laser deposition technique. At all measurement temperatures, the leakage current behavior of t…
Magnetic Non Destructive Testing (MNDT) methods are a tool not limited in the detection of cracks and defects, like traditional NDT methods for ferrous structures, but they have shown a potential for the monitoring of the structure and crack prevention. MNDT techniques include surface Magnetic Barkhausen Noise measure…
Abstract Application of ethylenediamine tetraacetic acid (EDTA) in the chemical bath solution to enhance the physical and optical properties of chemical bath deposited CdS film was realised. The observed beneficial effect on the crystallisation of CdS crystallites in the bath solution followed by deposition on glass s…
Abstract In this work, multiwall carbon nanotubes (MWCNT) were functionalized with phenol and characterized by using Fourier transform infrared spectroscopy (FTIR). Isotactic polypropylene (iPP)/MWCNT composites of both the unfunctionalized and functionalized MWCNT were prepared by melt blending in a miniextruder at d…
Platinum grown by atomic layer deposition (ALD) on SrTiO3(001) surfaces was studied as a function of Pt coverage and post-deposition thermal treatment. The combination of atomic-force microscopy, scanning electron microscopy, x-ray fluorescence, x-ray reflectivity, and grazing-incidence small-angle x-ray scattering re…
Abstract Silver‐doped ZnO nanostructures were prepared by a chemical vapor deposition (CVD) method. Compared with pure ZnO, the doped samples have a lower crystallinity and a shift of the (002) diffraction peak to lower angle. X‐ray photoelectron spectroscopy (XPS) results testify the incorporation of silver (Ag) into…
Printable transparent hybrid composites consisting of indium tin oxide (In2O3:Sn; ITO) nanoparticles and conducting polymer 3,4-polyethylenedioxythiophene (PEDOT) as matrix material were developed. The basic idea is to fill up the pores of the highly porous nanoparticulate ITO network to improve the interparticle cont…