Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The fully epitaxial ZnO-based ZnO:Co/ZnO:Mg/ZnO:Co magnetic tunnel junctions were grown on Al2O3(0001) substrate by oxygen plasma-assisted molecular beam epitaxy. The magnetoresistance behavior and spin injection through ZnO:Mg barrier were investigated. An enhanced positive tunnel magnetoresistance ratio of 85.6% is…
Failure of a single-atomic-layer graphene sheet is analyzed in plane tension under the varying biaxiality condition. The analysis is based on the combined use of continuum and molecular mechanics where the strain energy is expressed with the help of the Tersoff-Brenner atomistic potential. A critical failure surface i…
A concept for the precise tailoring of a wide variety of nanogranular composites with a gas aggregation cluster source and a magnetron is presented. Electrical charging of the preformed clusters and the substrate in a plasma is discussed as a fundamental physical hindrance for conventional co-sputtering with a cluster…
La tesi offre un contributo alla modellazione dei fenomeni accoppiati di rigonfiamento gassoso e rilascio di gas di fissione in combustibili nucleari a base di ossidi, con applicazione all’analisi termo-meccanica integrale (e, in definitiva, alla progettazione e al licensing) delle barrette di combustibile. Il lavoro…
Thermal behavior of afghanite, (Na 15 K 5 Ca 11 ) Σ31 [Si 24 Al 24 O 96 ](SO 4 ) 6 Cl 6 , P31c, a = 12.7961(7) Å, c = 21.4094(13) Å, an eight-layer member of the cancrinite group, has been investigated by combined electron microprobe analysis, X-ray single-crystal diffraction, and high-temperature X-ray powder diffrac…
OBJECTIVE: Gadobutrol is an extracellular macrocyclic gadolinium chelate recently introduced in MRI, and it has already been used for cardiac late enhancement imaging; however, until now it has never been compared with gadopentetate dimeglumine. The purpose of our study was to compare 0.1 mmol/kg gadobutrol to 0.2 mmo…
The new mineral pavlovskyite Ca 8 (SiO 4 ) 2 (Si 3 O 10 ) forms rims together with dellaite Ca 6 (Si 2 O 7 )(SiO 4 )(OH) 2 around galuskinite Ca 7 (SiO 4 ) 3 CO 3 veins cutting calcio-olivine skarns in the Birkhin gabbro massif. In addition, skeletal pavlovskyite occurs in cuspidine zones of altered carbonate xenolith…
The synthesis of magnetically separable quasi-homogeneous base catalyst and heterogeneous base catalyst is described. The quasi-homogeneous catalyst is achieved by supporting silane monomers functionalized with different amine groups directly on the surface of magnetite nanoparticles. The heterogeneous catalyst is pre…
In this paper, we have studied the magnetic and magnetocaloric properties of the perovskite manganites La0.67Pb0.33−x Ag x MnO3 (0≤x≤0.15), which show a sharp paramagnetic-ferromagnetic phase transition over a wide temperature range (T=250–401 K). The Curie temperature has been analyzed by two methods: using the numer…
While polymorphism remains a key issue within the pharmaceutical and related industries, the understanding of the transformation process itself remains relatively poorly understood. In this study we use a combination of conventional and modulated temperature differential scanning calorimetry (MTDSC), quasi-isothermal…
Rhodium has been proved to possess unique reactivity to convert NO x into N 2 with high conversion efficiency and selectivity. In this study, we have carried out DFT calculations on the reaction mechanism in the reduction of NO by CO on the surface of the Rh 7 + cluster. The calculated results suggest that the reactio…
The effect of S-doping on the properties of double perovskite La2FeMoO6 (LFMO) is investigated by using density-functional calculations. The results reveal that the ground state of the series La2FeMoO6−xSx is ferrimagnetic, with I4/mmm symmetry for x = 0 and 6, and I4mm symmetry for the others. With increasing the amo…
The novel conducting metallopolymer [N,N'-((2,2'-dimethyl)propyl)bis(5-(2,2'-bithiophene-5-yl)salcylideniminato-palladium(II)](n) prepared by electropolymerization provides a polymer matrix in which the palladium metal centers are evenly distributed. The metal centers embedded directly in the conducting metallopolymer…
Motivated by experiments on nonmagnetic triangular-lattice Mott insulators, we study one candidate paramagnetic phase, namely the columnar dimer (or valence-bond) phase. We apply variants of the bond-operator theory to a dimerized and spatially anisotropic spin-1/2 Heisenberg model and determine its zero-temperature p…
In a magnetically driven electronic nematic state, an externally applied uniaxial strain rounds the nematic transition and increases the magnetic transition temperature. We study both effects in a simple classical model of the iron pnictides expressed in terms of local $\text{SO}(N)$ spins (with $N=3$) which we solve…
We transferred nanosecond ferroelectric domain switching currents of leaky Fe-enriched bismuth ferrite thin films into polarization-electric (P-E) hysteresis loops from which nanosecond-range polarization retention as well as imprint was extracted. All the films suffer from a quick remanent polarization loss after 4 μ…
The authors report a method where in-situ photon assisted heating of multi-wall carbon nanotubes was utilized for enhanced polymerization of the nanotube/polydimethylsiloxane interface that resulted in significant load transfer and improved mechanical properties. Large Raman shifts (20 cm(-1) wavenumbers) of the 2D ba…
Conductive Ag nanoparticles dispersed Pb0.4Sr0.6TiO3 (PST) thin film was obtained by dual complexing agents of citric acid and acetylacetone controlled sol route heated in air without using reduction atmosphere. Percolation behaviour occurs with the nano-particle fraction adjacent to a threshold. Dielectric constant o…
High-molecular-weight poly(biphenylene oxide)s (PBPO) were prepared from AB-type monomers, 4′(3′)-hydroxy-4-nitro-2,6-bis(trifluoromethyl)biphenyl, through a meta -activated nitro displacement reaction. The displacement of nitro leaving group activated by the two trifluoromethyl groups at the meta -position produced h…
Crystal structures of the three polytypes of veatchite, Sr 2 B 11 O 16 (OH) 5 ·H 2 O, are determined by X-ray, single-crystal studies. The polytypes are: veatchite-1A, triclinic space group P1̄, with a = 6.6378(6), b = 6.7387(6), c = 20.982(2) Å, α = 87.860(1), β = 82.696(12), γ = 60.476(1)°, V = 809.7(2) Å 3 ; veatch…