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。
The inverted porphyrins 2-aza-5,10,15,20-tetraphenyl-21-carbaporphyrin (CTPPH2) and its methylated derivatives 2-aza-2-methyl-5,10,15,20-tetraphenyl-21-carbaporphyrin (2-NCH3CTPPH) and 2-aza-2-methyl-5,10,15,20-tetraphenyl-21-methyl-21-carbaporphyrin (2-NCH3-21-CH3CTPPH) stabilize the rare organocopper(II) complexes (…
In strong magnetic fields up to 20 T quasistatic measurements of the magnetic-field-induced electric polarization have been performed in ${\mathrm{LiNiPO}}_{4}$ single crystals between 4.2 and $\ensuremath{\sim}25$ K. The magnetoelectric (ME) effect has been studied in detail near the N\'eel temperature. The temperatu…
The influence of plasma oxidation and other surface pretreatments on the electronic structure of indium–tin–oxide (ITO) thin films has been studied by high resolution x-ray photoemission spectroscopy. Plasma oxidation compensates n-type doping in the near surface region and leads to a reduction in the energy of plasmo…
The carbon monoxide (CO) adsorption activity of small gold-cluster anions (Au N -, N = 4−19) has been measured by pulsed helium flow-reactor methods at room temperature. In contrast to other metals, the reaction-product distributions, Au N (CO) M = ( N, M ), measured over a range of CO partial pressure, reveal highly…
The Mg/Al layered double hydroxide−deoxycholate intercalation compounds were successfully synthesized by a novel hydrothermal reaction between brucite, gibbsite, and deoxycholic acid. The layered double hydroxide−deoxycholate intercalation compounds showed some important characteristics such as curved platy morphology…
We characterize the selective deposition of liquid microstructures on chemically heterogeneous surfaces by means of dip coating processes. The maximum deposited film thickness depends critically on the speed of withdrawal as well as the pattern size, geometry, and angular orientation. For vertically oriented hydrophil…
ABSTRACT Two‐phase polymer blends of poly(lactic acid) (PLA) and corn or wheat starches at various ratios were prepared by using a laboratory‐scale twin‐screw extruder and compression molding. The blends were characterized for thermal transitions, mechanical properties, and water absorption. Starch and PLA were immisc…
Codeposition of hydrocarbons is a severe problem during focused electron beam writing of pure metal nanostructures. When using organometallic precursors, a low metal content carbonaceous matrix embedding and separating numerous nanosized metal clusters is formed. In this work, we present a new and easy approach to obt…
Various types of silica, silica gel, fumed silicas and fused silica were added to polypropylene and polyethylene oxide to determine their flame retardant effectiveness and mechanisms. Polypropylene was chosen as a non-char-forming thermoplastic and polyethylene oxide was chosen as a polar char-forming (slight) thermop…
The main interest in the area of practical applications of ferroelectrics, particularly at the microwave frequency, is oriented now to room temperature. In this connection, ferroelectrics like BaxSr1−xTiO3 should be carefully studied. Such materials are characterized by the second order phase transition. In a perfect…
Uniform hollow polymer microspheres were prepared by coating silica microsphere templates with poly(benzyl methacrylate) using surface-initiated controlled/living radical polymerization and subsequently removing the core by chemical etching. Shell thickness was controlled by varying the polymerization time. Scanning e…
What factors determine whether or not a particular liquid will wet a particular surface? Is it possible for a meniscus in a capillary to become convex from concave? What would you have to do to flatten it out? In university courses in physics there is often a lack of example or comment concerning the influence of temp…
We investigate a toy model of liquid, based on simplified hypernetted chain equations in very large spatial dimension D. The model does not exhibit a phase transition, but several regimes of behavior when D-->infinity can be observed in different intervals of the density.
No abstracts
We investigate the structure of defects in nematic liquid crystals confined in spherical droplets and subject to radial strong anchoring. Equilibrium configurations of the order-parameter tensor field in a Landau-de Gennes free energy are numerically modeled using a finite-element package. Within the class of axially…
The spectrally selective optical properties of wavelength selective radiation emitters and filters based on periodically microstructured metal surfaces were investigated. Metal surfaces were structured by the use of a holographic mask and subsequent etching processes. Due to the microstructure, thermally excited surfa…
The charge ordering process in a mixed valence system ${\mathrm{LuFe}}_{2}{\mathrm{O}}_{4}$ is investigated both experimentally and theoretically. The experimental results using various types of diffraction techniques reveal the following unique features. (i) The system undergoes sequential transitions: $\mathrm{disor…
The nucleation of hydroxyapatite (HAp) crystal through chemical interaction with collagen was investigated. A collagen membrane was soaked in a supersaturated simulated body fluid (1.5 SBF) solution with ion concentrations at 1.5 times that of normal simulated body fluid (1.0 SBF). A few carbonate‐containing HAp cryst…
The tetranuclear [Ni4(pypentO)(pym)(mu 3-OH)2(mu-Oac)2(NCS)2(OH2)] cubane-like complex has been prepared, and its structure and magnetic properties have been studied (pypentO and pym are the deprotonated forms of 1,5-bis[(2-pyridylmethyl)amino]pentane-3-ol and 2-pyridylmethanol, respectively). The X-ray diffraction an…
In this paper, a new tool is proposed to carry out acoustic cavitation monitoring and to have an overview of its effects in applications. After a brief review of the cavitation characterization techniques, it is shown that cavitation noise is a suitable and accurate indicator of the cavitation activity induced in a li…