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。
Due to its unprecedented physical properties, graphene has generated huge interest over the last 7 years. Graphene is generally fabricated in one of two ways: as very high quality sheets produced in limited quantities by micromechanical cleavage or vapor growth or as a rather defective, graphene-like material, graphen…
We combined photonic crystal (PC) and nanoporous structures in silicon (Si) to decrease the reflectance of the Si surface. Due to gradual increase of effective refractive index in this structure, reflection is reduced drastically over a broad spectral range. A two-dimensional Si PC was fabricated by interference litho…
Pyridinium chlorochromate, [C(5)H(5)NH](+)[ClCrO(3)](-) (hereafter referred to as PyClCrO(3)), was studied by X-ray diffraction, differential scanning calorimetry (DSC) and dielectric methods. Studies reveal three reversible phase transitions at 346, 316 and 170 K with the following phase sequence: R ̅3m (I) → R3m (II…
A method for finding the effective permeability of metamaterials is presented, based on the interaction between electromagnetic and magnetoinductive waves. Assuming a coupled circuit model for the interaction, a dispersion equation is derived that exhibits two types of bandgaps, one leading to complex solutions and th…
Pattern formation in uniaxial polymeric liquid crystals is studied for different dynamic closure approximations. Using the principles of mesoscopic non-equilibrium thermodynamics in a mean-field approach, we derive a Fokker-Planck equation for the single-particle non-homogeneous distribution function of particle orien…
Under high dc bias conditions, experimental observations show B-H loops can exhibit a figure-eight shape, as energy is returned from the magnetic core back to the magnetic excitation supply during a portion of the excitation cycle. However, an explanation for this phenomenon is yet to be reported. In this paper, exper…
We use first-principles method to investigate the electronic, magnetic, and mechanical properties of graphene nanoribbons (GNRs) with extended line defect. Particular attention has been placed on zigzag GNR with 5-8-5 line defect and armchair GNR with 4-8 line defect. The results show that the band gaps of GNRs can be…
Gold nanorods (GNRs) have found widespread applications in nanocomposites and thin films, because of their unique optical, chemical, and photothermal properties, which are dictated by the rod size and aspect ratio. In this study, gold nanorods (GNRs, aspect ratio of 3–4) were synthesized using a high-yield, aqueous, s…
We analyze the possibility of polymer blends undergoing phase separation in two dimensions. To this end, we investigate a model system consisting of water-supported Langmuir monolayers, obtained from binary polyalkyl-methacrylate mixtures (PXMA, where X stands for any of the type of ester side groups used: M, methyl-;…
It is evident from the literature that the 122 iron arsenides, XFe(2)As(2) with X = Ca, Sr, Ba or Eu, undergo one or more phase transitions from a higher-temperature paramagnetic tetragonal structure in grey group I4/mmm1' to an antiferromagnetic structure with magnetic space group C(A)mca. Symmetry analysis is used t…
We report the superbroadband photoluminescence extending from 1.3 to 1.7 μm in Neodymium(Nd3+)/Thulium(Tm3+)/Erbium(Er3+) codoped fluorotellurite glasses under 793 nm excitation. This superbroadband luminescence is contributed by the Nd3+:4F3/2→4I13/2, Tm3+:3H4→3F4, and Er3+:4I13/2→4I15/2transitions that lead to broad…
The synergistic effects of tamoxifen on the sensitivity of MCF-7 cells to daunorubicin have been reported. Whether the effects of daunorubicin on MCF-7/adr cells can be improved by tamoxifen in liposomes and how tamoxifen changes daunorubicin's behavior in vivo remains unclear. The aim of this study was to investigate…
Topotaxial growth of Au(x) Ag(1-x) alloy nanowires (NWs) by postepitaxial deposition of Ag vapor on Au NWs and investigation of their plasmonic properties are reported. Ag vapor is supplied onto the epitaxially grown Au NWs, topotaxially turning them into Au(x) Ag(1-x) alloy NWs. The original geometries and alignments…
The physicochemical characterization, that is, ground and excited state, of a new series of dendronized porphyrin/fullerene electron donor-acceptor conjugates in nonaqueous and aqueous environments is reported. In contrast to previous work, we detail the charge-separation and charge-recombination dynamics in zinc and…
The effects of temperature on the stress-induced variant reorientation process and the possibility to trigger stress-induced martensite to austenite phase transformation in Ni 2 MnGa single crystals were investigated under compression. It is revealed that, as the temperature decreases, both the critical stress (under…
The sample-size dependence of plastic yielding in nanoscale metal pillars is not a purely geometrical fact, explainable just in terms of shape and geometry of the pillar, but depends on the actual content of inner dislocations. The present study discusses the role of the initial density of bulk dislocations ρ on the p…
We present the dielectric dispersion in a Pb(Fe1/2Nb1/2)O3 (PFN) thin film grown on (001) SrTiO3 substrate from 20 MHz to 20 GHz in the temperature range of 270 to 340 K. In the radio frequency region, the hopping charge transport and associated polar nanoregion and/or domain-wall motion contribute to the spectrum. In…
Nacre, or mother of pearl, is composed of aragonite tablets and is produced by some mollusks. Because of the highly organized internal structure, chemical complexity, mechanical properties and optical effects of nacre, its formation is among the best-studied examples of calcium carbonate biomineralization. The pearl o…
An organized nonuniform mass distribution in solids leads to a monotonically varying thermal conductivity in a nanomaterial so that the heat flux is directionally dependent. We investigate through molecular dynamics simulations if the influence of an organized mass distribution in a fluid also leads to thermal rectifi…
Abstract The crystal structure, phase relationship and sintering characteristics of (Sr0.7La0.3)1−xTiO3+δ perovskites (0 ≤ x ≤ 0.12) have been studied using the Pechini method. High-temperature neutron diffraction analysis showed that (Sr0.7La0.3)TiO3+δ has an orthorhombic structure at room temperature and a cubic str…