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。
Staying on a plane: Even small substituents on the backbone of conjugated polymers can cause them to twist significantly, lowering conjugation and leading to wider band gaps. Oligo- and polyselenophenes are more rigid than their thiophene analogues, and can maintain their planarity and low band gap with substituents t…
We report on a heretofore unnoted giant negative magnetocapacitance (>20%) in non-magnetic Au/GaAs:Si Schottky barriers that we attribute to a magnetic field in-duced increase in the binding energy of the shallow donor Si impurity atoms. Depletion capacitance (Cdep) dispersion identifies the impurity ionization and ca…
The physical principles are studied for the optimal design of a quantum multiwell heterostructure working as an electrostatic energy storage device. We performed the search for an optimal multiwell trapping potential for electrons that results in the maximum static palarizability of the system. The response of the het…
We report pulsed laser deposition synthesis and characterization of polycrystalline Fe1-xCox Si thin films on Si (111). X-ray diffraction, transmission electron, and atomic force microscopies reveal films to be dense, very smooth, and single phase with a cubic B20 crystal structure. Ferromagnetism with significant mag…
Here we show that variations of temperature, even of a few degrees in amplitude, induce the ageing of a granular pile. In particular, we report measurements of physical properties of a granular heap submitted to thermal cycles. Namely, we focus on the evolution of the thermal linear-expansion coefficient and of the th…
The illumination of single-layer graphene (SLG) transistors with visible light causes a negative shift in their transfer curves, attributable to the desorption of oxygen. However, their hysteresis is not affected by illumination, which suggests that charge traps are not affected by the visible-light exposure. When SLG…
In this contribution, we study situations in which nanoparticles in a fluid are strongly heated, generating high heat fluxes. This situation is relevant to experiments in which a fluid is locally heated using selective absorption of radiation by solid particles. We first study this situation for different types of mol…
The design, synthesis, and evaluation of the Copper-Gad (CG) family, a new class of copper-activated magnetic resonance imaging (MRI) contrast agents, are presented. These indicators comprise a Gd(3+)-DO3A core coupled to various thioether-rich receptors for copper-induced relaxivity switching. In the absence of coppe…
One of the key aspects governing the mechanical performance of composite materials is debonding: the local separation of reinforcing constituents from matrix when the interfacial strength is exceeded. In this contribution, two strategies to estimate the overall response of particulate composites with rigid-brittle int…
Central quantities in spectroscopy and magnetism of transition ions in crystals are crystal field parameters (CFPs). Nature self-imposed limits on orthorhombic and lower symmetry CFPs, and existence of intrinsically incomparable CFP sets are elucidated. Comparisons of such CFP sets result in controversial claims, inco…
We discuss a model for the onsite matrix elements of the $s{p}^{3}{d}^{5}{s}^{\ensuremath{\ast}}$ tight-binding Hamiltonian of a strained diamond or zinc-blende crystal or nanostructure. This model features onsite, off-diagonal couplings among the $s$, $p$, and $d$ orbitals and is able to reproduce the effects of arbi…
A new layered pnictide oxide (Fe 2 P 2 )(Sr 4 Sc 2 O 6 ) has been synthesized by solid-state reaction. This material has an alternating layer stacking structure of anti-fluorite Fe 2 P 2 and perovskite-based Sr 4 Sc 2 O 6 oxide layers. The space group of the material is P 4/ nmm and the lattice constants a and c are 4…
Copper-containing mesoporous HMS catalysts prepared via a one-pot synthesis method based on sol−gel chemistry have been systematically characterized focusing on the effect of copper loading. Structural characterization of a series of different copper loading samples was performed by means of N 2 adsorption, X-ray diff…
Abstract Amphiphilicity is one of the molecular bases for self‐assembly. By tuning the amphiphilicity of building blocks, controllable self‐assembly can be realized. This article reviews different routes for tuning amphiphilicity and discusses different possibilities for self‐assembly and disassembly in a controlled m…
Abstract In this Review, recent achievements in the multilevel interior‐structured hollow 0D and 1D micro/nanomaterials are presented and categorized. The 0D multilevel interior‐structured micro/nanomaterials are classified into four main interior structural categories that include a macroporous structure, a core‐in‐h…
Freestanding and flexible graphene/polyaniline composite paper was prepared by an in situ anodic electropolymerization of polyaniline film on graphene paper. This graphene-based composite paper electrode, consisting of graphene/polyaniline composite sheets as building blocks, shows a favorable tensile strength of 12.6…
Abstract The function of mobile phone becomes more versatile as a personal assistant. In order to make display device optimized for different function of the mobile phone, this paper proposes a display device which can be switched among 2D direct view, 3D direct view and projection modes while using single liquid crys…
Models of fretting corrosion and fretting fatigue are considered. For the example of materials used in airplane gas-turbine engines and stationary power units, it is shown that the rate of fretting processes in slow-moving joints depends upon the relative displacement, the pressure, the conditions of loading, bending,…
Silane-modified montmorillonites(MMTs) and Cu 2+ -silane modified MMTs have been prepared by treating Na + montmorillonites (Na + -MMTs) with silane coupling agents and copper (II) sulfate, and poly(vinyl chloride)(PVC)/modified MMT composites were prepared by using a twin-screw extruder. The microstructures of the mo…
Nanoimprint lithography (NIL) has proven to be an exceptional lithographic technique for nanoscale features. The elimination of the adhesion of the imprinted polymer to the imprinter upon withdrawal of the imprinter is crucial for a reliable transfer of the nanoscale pattern. Previous work on thick (>100 nm) diamond-l…