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。
Extensive studies on polymer thin films to date have revealed their interesting but unusual properties such as film thickness dependence of glass transition temperature Tg and thermal expansivity. Recent studies have shown that the lower Tg is not always related to the higher mobility in polymer thin films, which cont…
A straightforward process was developed to synthesize monetite (CaHPO 4 , dicalcium phosphate anhydrous) powders at room temperature (21°±1°C) in ethanol solutions. The process reported here constitutes an alternative to well‐publicized monetite synthesis procedures based on the dehydration of brushite (CaHPO 4 ·2H 2…
The effect of acceptor concentration in (Mg)‐doped BaTiO 3 on the resistance degradation behavior was contrasted between coarse‐ and fine‐grain samples with ∼90 and ∼0.8 μm in size, respectively. Both cases showed similar trends that the time to degradation decreased systematically with the increase of acceptor concen…
A new ladder-type bis-N-annulated quaterrylenebis(dicarboximide) (1) was synthesized, and it exhibits excellent solubility in common organic solvents, high molar absorptivity, and good stability. Moreover, it absorbs and emits light in the near-IR spectral region with a high fluorescence quantum yield. All these prope…
Using a lattice-gas model in mean-field theory, we discuss the problem of how adsorption and desorption of fluids in independent cylinderlike pores is influenced by variations in the pore diameter along the length of the pore, surface roughness of the pore walls, and chemical heterogeneity. We also consider the impact…
Based on first-principles calculations, we have investigated the magnetic properties of the first-row element-doped ZnS semiconductors. Calculations reveal that Be, B, and C dopants can induce magnetism while N cannot lead to spin polarization in ZnS. A possible explanation has been rationalized from the elements' ele…
Spectroscopic investigations of molecules having their main infrared (IR) signatures at longer wavelengths require optical elements transmitting lights as far as possible in the IR region toward 20 μm and beyond. In this paper, several far‐IR transmitting glass systems including Ge–In–Te, Ge–As–Te, as well as some com…
Hole-transporting framework is formed by surfactant-templated sol-gel polycondensation of an electroactive phenylenevinylene-based organosilane precursor. Molecular geometry of the three-armed precursor contributes to both formation of periodic mesostructures and introduction of hole conductivity in the organosilica h…
Grazing-incidence X-ray fluorescence measurements were applied for a time-resolved study of an organic memristor conductivity variation mechanism. A comparison of these results with electrical measurements has allowed us to conclude that the variation of the fluorescence intensity of Rb ions is directly connected to t…
The identity of expanded austenite as developing during low temperature nitriding and/or carburising of austenitic stainless steel has been under debate since the very first observation of this phase. In the present article, recent results obtained with (a) homogeneous samples of various uniform compositions and (b) u…
Abstract PVA and PVA/SWNT fibers (PVA = poly(vinyl alcohol), SWNT = single‐walled nanotubes) were processed by gel spinning. At 1 wt.‐% SWNT loading, tensile strength increased from 1.6 GPa for the control PVA to 2.6 GPa for PVA/SWNT composite. Analysis of this data suggests stress of up to ≈116 GPa on the SWNT in the…
New fluorescent dyes based on 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) and functionalized with a free carboxyl group have been conveniently synthesized from pyrroles and dicarboxylic anhydrides in one-pot reactions. Their spectral properties in different solvents showed little effect of solvatochromism (<10…
Filling the tube: Ultrathin metal nanowires with diameters of single atoms (ca. 1.7 nm) were synthesized in high yield by using a nanofilling reaction using the nanospace of carbon nanotubes (CNTs). As the nanowires are protected by the wall of the CNTs, they resist oxidation and structural disintegration even under a…
This article is written to serve as an introduction to the topic of "Wetting and Superhydrophobicity" and to give some perspective for the papers that follow. This area of research that impacts and overlaps many fields of science and technology has been identifiable for centuries, but has gained considerable traction…
Polyester dendrimers are attractive for in vivo delivery of bioactive molecules due to their biodegradability, but their synthesis generally requires multistep reactions with intensive purifications. A highly efficient approach to the synthesis of dendrimers by simply "sticking" generation by generation together is ac…
Nanoparticles are often used as seeds to grow one-dimensional nanomaterials or as core materials to prepare core−shell nanostructures. On the other hand, the presynthesized inorganic nanoparticles can also be used as starting building blocks to prepare inorganic−polymer nanocomposites. In this work, we explore the rol…
We consider 2- and 3-dimensional cubic monocrystalline and polycrystalline materials. Expressions for Young's and shear moduli and Poisson's ratio are expressed in terms of eigenvalues of the stiffness tensor. Such a form is well suited for studying properties of these mechanical characteristics on sides of the stabil…
The ordered magnetic states of ${\text{MnWO}}_{4}$ at low temperatures were examined by evaluating the spin exchange interactions between the ${\text{Mn}}^{2+}$ ions of ${\text{MnWO}}_{4}$ on the basis of first principles density functional calculations and by performing classical spin analysis with the resulting spin…
We develop a theory of the effective disorder temperature in glass-forming materials driven away from thermodynamic equilibrium by external forces. Our basic premise is that the slow configurational degrees of freedom of such materials are weakly coupled to the fast kinetic-vibrational degrees of freedom and therefore…
This is the first of three papers devoted to the nonequilibrium thermodynamics of amorphous materials. Our focus here is on the role of internal degrees of freedom in determining the dynamics of such systems. For illustrative purposes, we study a solid whose internal degrees of freedom are vacancies that govern irreve…