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。
A pair of mutually twisted metallic cross-wires can produce giant optical activity. When this single chiral layer is stacked layer by layer in order to build a thick chiral metamaterial, strong coupling effects are found between the two adjacent chiral layers. We studied these coupling effects numerically and experime…
Perovskite type (Ba0.9Bi0.1)(Ti0.9Al0.1)O3 (BBTA) ceramics have been prepared through solid state reaction route. The room temperature x-ray diffraction study suggests that BBTA ceramics have single phase tetragonal symmetry with space group P4mm. In contrast to the sharp dielectric transition of pure BaTiO3, a broad…
On the basis of the density functional theory (DFT) within local density approximations (LDA) approach, we calculate the band gaps for different size SnO 2 quantum wires (QWs) and quantum dots (QDs). A model is proposed to passivate the surface atoms of SnO 2 QWs and QDs. We find that the band gap increases between QW…
In this study, we have analyzed the Au/ZnO single nanowire based Schottky diode by investigating temperature dependent current voltage and x-ray photoelectron spectroscopy (XPS) measurements. The calculated barrier height of the Schottky diodes by using the thermionic emission model is in good agreement with the value…
The impact of process variation in deep-submicron technologies is especially pronounced for SRAM architectures which must meet demands for higher density and higher performance at increased levels of integration. Due to the complex structure of SRAM, estimating the effect of process variation accurately has become ver…
The upconversion luminescence (UCL) of the hexagonal (β)-phase NaYF4:Yb,Er nanophosphors as a function of temperature (300–450 K) was examined under 978 nm light excitation. The thermal sensitivity was evaluated based on the UCL intensity ratio between H211/2–I415/2 and S43/2–I415/2 transitions (RHS). Excitation power…
In this letter, we report that an essentially extended scaling version of the Avramov model leads to a consistent relation between dynamic scaling and thermodynamic properties in the thermodynamic scaling regime, which is valid for a considered herein ionic liquid 1-butyl-1-methylpyrrolidinium bis[oxalate]-borate (BMP…
Hybrid semiconductor-metal nanoparticles exhibit a combination of properties from the disparate components or even, more interestingly, synergetic properties which arise from the coupling between the two materials. In this work, we study the second harmonic generation (SHG) in CdSe-Au hybrid nanoparticles in compariso…
In this paper, we investigate the transport properties of carbon nanotube field-effect transistors (CNTFETs), with a nonequilibrium Green's function (NEGF) method. Tunneling leakage currents with respect to gate voltages are known effects for MOSFET-like CNTFETs (MOSCNTs). To minimize this phenomenon, we have proposed…
A modular and hierarchical self-assembly strategy using block copolymer blends (AB/B'C) with tunable supramolecular interactions is reported. By combining supramolecular assembly of hydrogen-bonding units with controlled phase separation of diblock copolymers, highly ordered square arrays or hexagonal arrays of cylind…
Small oxidized silicon nanocrystals of average sizes below 3.5 nm are prepared using modified electrochemical etching of a silicon wafer. Modifications introduced in the etching procedure together with postetching treatment in H2O2 lead to a decrease in the nanocrystalline core size and also, to some extent, to change…
The hydrothermal stability of mesostructured cellular silica foams (MCFs) was studied in detail for the first time, using a variety of techniques including transmission electron microscopy, nitrogen sorption, small-angle X-ray scattering, 29 Si solid-state nuclear magnetic resonance, and Fourier transform infrared spe…
Rubber material properties, and useful lifetime prediction and evaluation are very important in the design procedure to assure the safety and reliability of rubber components. We have been interested for many years in predicting the lifetimes of rubber materials in oxygen-containing environments using a combination of…
All-optical pump-probe measurements of magnetization dynamics have been performed upon epitaxial ${\text{Co}}_{2}\text{MnSi}(001)$ Heusler alloy thin films annealed at temperatures of 300, 400, and $450\text{ }\ifmmode^\circ\else\textdegree\fi{}\text{C}$. An ultrafast laser-induced modification of the magnetocrystalli…
The photoinduced electron transfer reactions in a self-assembled 1:1 complex of zinc(II)tetrasulphonatophenylporphyrin (ZnTPPS(4-)) and methylviologen (MV(2+)) in aqueous solution were investigated with transient absorption spectroscopy. ZnTPPS(4-) was excited either in the Soret or one of the two Q-bands, correspondi…
Experimental results on the temperature dependence of the entropy change induced by magnetic field in a Ni–Mn–In–Co ferromagnetic shape memory alloy have been analyzed. Different behaviors of the entropy change ΔS versus temperature have been observed, depending on the value of polarizing magnetic field. In addition,…
Precession electron diffraction (PED) is a new promising technique for electron diffraction pattern collection under quasi-kinematical conditions (as in X-ray Diffraction), which enables “ab-initio” solving of crystalline structures of nanocrystals. The PED technique may be used in TEM instruments of voltages 100 to 4…
An important challenge in technology is to tailor optical, electric and electronic properties of nanoparticles by controlling their size and shape. Biomimetic synthesis of nanoparticles has opened its doors to a world of nanoparticles with easy preparation protocols, less toxicity and a wide range of applications acco…
Abstract A zero‐emissions power plant with high efficiency is presented. Syngas, produced by the gasification of coal, is shifted to produce H 2 which in turn fuels stacks of solid oxide fuel cells. Because the fuel cells maintain separate anode and cathode streams, air can be used as the oxygen source without dilutin…
IMPORTANCE OF THE FIELD: Innovative biomedical techniques operational at the nanoscale level are being developed in therapeutics, including advanced drug delivery systems and targeted nanotherapy. Given the large number of nanoparticles that are being developed for possible biomedical use, the use of computational met…