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。
Atomistic molecular dynamics simulations are performed on oligomeric polyamide-6,6 chains, composed of 10 chemical repeat units, at a carbon nanotube (CNT) interface. The effect of surface curvature on the structure and dynamics of polymer is studied by simulating systems containing CNTs of various diameters. It is sh…
The oxidation of CO is the archetypal heterogeneous catalytic reaction and plays a central role in the advancement of fundamental studies, the control of automobile emissions, and industrial oxidation reactions. Copper-based catalysts were the first catalysts that were reported to enable the oxidation of CO at room te…
A trinuclear complex [(CuL) 2 Tb(H 2 O)(NO 3 ) 3 ]·MeOH·H 2 O ( 1 ) is synthesized by using a metalloligand [CuL] (H 2 L = N, N ′-bis(salicylidene)-1,3-propanediamine or salpn). This complex is used as a new 3d-4f metallatecton for stepwise supramolecular oligomerization along with a simple diimine linker, 4,4′-bipyri…
Adsorptive removal of cationic brilliant green (BG) dye by dodecyl-benzene-sulfonic-acid doped polyaniline/multiwalled carbon nanotubes composite has been investigated as a function of contact time, solution pH, initial dye concentration, and temperature. Raman spectroscopy, Fourier transforms infrared spectroscopy, s…
Graphene is a wonder material with the ultimate smallest thickness that is readily accessible to various approaches for engineering its excellent properties. Graphene doping is an efficient way to tailor its electric properties and expand its applications. This topic covers wide research fields and has been developing…
A weak aspect of the in vitro studies devoted to get information on the toxic, genotoxic and carcinogenic properties of nanomaterials is that they are usually conducted under acute-exposure and high-dose conditions. This makes difficult to extrapolate the results to human beings. To overcome this point, we have evalua…
While production of engineered carbon nanotubes (CNTs) has escalated in recent years, knowledge of risk associated with exposure to these materials remains unclear. We report on the cytotoxicity of four CNT variants in human lung epithelial cells (A549) and murine macrophages (J774). Morphology, metal content, aggrega…
First-principles calculations were employed to explore the electronic and magnetic properties of a two-dimensional (2D) SnSe 2 monolayer sheet and its derived one-dimensional (1D) nanoribbons and nanotubes. The results unveiled that the semiconductor–metal or metal–semiconductor transition can be realized by subtly co…
Silver nanoparticles (AgNPs) are widely used in consumer and medical products. However, most AgNP toxicity data are based on in vitro studies. Only a few studies were performed in mammals and no studies systematically assessed cancer risk of AgNPs. In this study, we examined whether oral exposure to polyvinylpyrrolido…
Substitution effects of 3d transition metal (TM) impurities on electronic and magnetic properties for Cu12Sb4S13 tetrahedrite are investigated by the combination of low-temperature experiments and first-principles electronic-structure calculations. The electrical resistivity for the cubic phase of Cu12Sb4S13 exhibits…
Functional cellulose substrates with tetrazole moieties are generated to serve as universal platforms for the spatio-temporal immobilization of synthetic ultra-low fouling polymer brushes and protein species via a nitrile imine-mediated tetrazole-ene cycloaddition (NITEC)-based protocol. Poly(carboxybetaine acrylamide…
Nanoparticles (NPs) incorporated into commercial products are reactive on plants. Here, the influence of a root-associated bacterium, Pseudomonas chlororaphis O6 (PcO6) on the responses of bean (Phaseolus vulgaris) to commercial ZnO nanoparticles (NPs) was examined. ZnO NPs (250-1000 mg Zn/kg) significantly (p = 0.05)…
The piezoelectric compositions (1 − x)Ba(Zr0.2Ti0.8)O3–x(Ba0.7Ca0.3)TiO3 (BZT-xBCT) span a model lead-free morphotropic phase boundary (MPB) between room temperature rhombohedral and tetragonal phases at approximately x = 0.5. In the present work, in situ X-ray diffraction measurements during electric field applicatio…
The production of boron-doped diamond nanoparticles enables the application of this material for a broad range of fields, such as electrochemistry, thermal management, and fundamental superconductivity research. Here we present the production of highly boron-doped diamond nanoparticles using boron-doped CVD diamond fi…
The slow decay of charge carriers in polymer–fullerene blends measured in transient studies has raised a number of questions about the mechanisms of nongeminate recombination in these systems. In an attempt to understand this behavior, we have applied a combination of steady-state and transient photoinduced absorption…
Nitrogen-vacancy (NV) centers in diamond have attracted significant interest because of their excellent spin and optical characteristics for quantum information and metrology. To exploit these characteristics, precise control of the orientation of the NV axis in the lattice is essential. Here we show that the orientat…
It is suggested that the substitutional nitrogen in diamonds bonded to three of the surrounding carbon atoms instead of four. This proposed electron configuration of the defect is deduced from previous experiments and theoretical considerations. Notably, the 1344 cm-1 band, characteristics of the substitutional Nitrog…
Relaxor ferroelectric perovskites are highly polarizable and can exhibit giant coupling between elastic strain and an applied electric field. Here, we report an in situ extended X-ray absorption fine structure (EXAFS) study of a PbZn1/3Nb2/3O3 (PZN) single crystal as a function of the electric field. We show that the…
Several first-principles calculations of positron-annihilation characteristics in solids have added gradient corrections to the local-density approximation within the theory by Arponen and Pajanne [Ann. Phys. (NY) 121, 343 (1979)] since this theory systematically overestimates the annihilation rates. As a further reme…
Well defined peaks with energies of about 18 meV have been observed in a variety of inelastic neutron scattering experiments on single crystals as well as on powders of iron-based superconductors and their parent compounds using either the triple-axis or the time-of-flight technique. They can easily be mistaken for si…