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。
Abstract We show, by employing the scattering matrix approach, that a magnetic field applied over a graphene strip can select obliquely incident ballistic electrons with definite energies, corresponding to specific Landau levels. The energy range in which filtering is possible depends on the position of the obliquely…
We study response and velocity autocorrelation functions for a tagged particle in a shear driven suspension governed by underdamped stochastic dynamics. We follow the idea of an effective confinement in dense suspensions and exploit a time scale separation between particle reorganization and vibrational motion. This a…
Abstract The new compound [Co(tren)(trenH 2 )] 2 [{Co(tren)} 2 V 15 Ge 6 O 42 S 6 (H 2 O)] · 9H 2 O [ 1 , tren = tris(2‐aminoethyl)amine] has been obtained under solvothermal conditions and features the unique thiogermanatovanadatopolyoxoanion[V IV 15 Ge IV 6 O 42 S 6 (H 2 O)] 12– as the main structural motif. Compoun…
In this letter, we report positive bias-induced Vthinstability in single and multilayer graphene field effect transistors (GFETs) with back-gate SiO2dielectric. The ΔVthof GFETs increases as stressing time and voltage increases, and tends to saturate after long stressing time. In the meanwhile, it does not show much d…
Phase equilibria up to solidus line in CuO–In2O3 system have been investigated using XRD and DTA/TG methods. According to the results, only one compound of the formula Cu2In2O5 formed in the system studied. Its thermal stability was determined in the air and argon proving that the compound did not melt but underwent d…
Brillouin light scattering spectroscopy was used to determine elastic properties of porous silicon films and superlattices. The film elastic properties were compared with previously published results and also used as input for an effective elastic medium model (M Grimsditch and F Nizzoli 1986, Phys. Rev. B 33 5891) to…
Toxoflavin (an azapteridine) is degraded to a single product by toxoflavin lyase (TflA) in a reaction dependent on reductant, Mn(II), and oxygen. The isolated product was fully characterized by NMR and MS and was identified as a triazine in which the pyrimidine ring was oxidatively degraded. A mechanism for toxoflavin…
Abstract Mesua ferrea L. seed oil based highly branched polyester modified epoxy resin has been utilized as a binder system for a low volatile organic compound (VOC) containing high solid paint formulation. The highly branched low molecular weight polyester resin acts as the reactive diluent of the epoxy resin which s…
This study describes the preparation of polystyrene–clay nanocomposite (PS-nanocomposite) colloidal particles via free-radical polymerization in dispersion. Montmorillonite clay (MMT) was pre-modified using different concentrations of cationic styrene oligomeric (‘PS-cationic’), and the subsequent modified PS-MMT was…
For numerical simulations of rapid forming processes the most used constitutive equations are based on the Johnson-Cook (JC) law and on the Zerilli-Armstrong (ZA) one. Starting from physical points of view, detailed in the first part, the present paper proposes a more general constitutive equation available for both s…
The high-energy electron irradiation effects on Fe-loaded, zeolite-supported catalyst were examined by transmission electron microscopy. In the original sample under little beam irradiation, no nanoparticles larger than 1 nm can be observed, and about half of the loaded Fe is identified as being in a positive ion stat…
Abstract Well‐defined side‐chain liquid crystal azopolymers have been synthesized by click chemistry of poly(propargyl methacrylate) with bifunctional liquid crystalline azides to produce materials with large degrees of functionalization. A polymeric scaffold having pendant alkyne groups was prepared by atom transfer…
The release of non-exchangeable potassium from 24 calcareous soils of divergent mineralogy, from southern Iran, was examined. Sand, silt and clay particles were fractionated after dispersion with an ultrasonic probe. Samples were extracted with 0.01 M CaCl2 for 30 successive 2-h periods. The clay fraction released the…
Raman selection rules for electronic and magnetic excitations in BaFe2As2 were theoretically investigated and applied them to the separate detection of the nodal and anti-nodal gap excitations at the spin density wave (SDW) transition and the separate detection of the nearest and the next nearest neighbor exchange int…
Electrochemical characteristics of Mn and Zr are reported in a dilute chloride electrolyte (0.1 M sodium chloride [NaCl]) over a wide pH range. This is because the relatively insoluble Mn and Zr are common in newer Al-free Mg alloys; however, little research has been conducted on the isolated effect of these elements…
Nonlinear vibrational behavior of a single-walled carbon nanotube based mass sensors is considered. The modeling involves stretching of the mid plane and damping. The equation of motion involves two nonlinear terms due to the curved geometry and the stretching of the central plane due to the bridged boundary condition…
Abstract We have demonstrated a simple near‐infrared (NIR) photodetector (PD) based on charge transfer complex (CTC) formed in molybdenum trioxide (MoO 3 ) doped N,N′‐di(naphthalene‐1‐yl)‐N,N′‐diphenyl‐benzidine (NPB), which shows a photocurrent of about 0.35 A/cm 2 at –3 V under 980 nm illumination. The existence of…
Bacterial aldolase-dehydrogenase complexes catalyze the last steps in the meta cleavage pathway of aromatic hydrocarbon degradation. The aldolase (TTHB246) and dehydrogenase (TTHB247) from Thermus thermophilus were separately expressed and purified from recombinant Escherichia coli. The aldolase forms a dimer, while t…
For the first time the four block copolymers derived from 1-alkyl[2-(acryloyloxy)ethyl]dimethylammonium bromides with hexyl (ADA) or cetyl (ADHA) groups and 2-hydroxyethylacrylate (HEA) or N-isopropylacrylamide (NIPAM) were synthesized and employed for functionalization of monodisperse iron oxide nanoparticles (NPs).…
Synthesis of Si quantum dots (QDs), useful for multi-junction crystalline Si solar cells, using porous Silicon (PS) is presented in this paper. Four types of freestanding PS structures are fabricated by anodization method with modulation of current density between two levels. The level-1 current density is kept consta…