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。
SiOC microcellular ceramic foams were prepared by means of a commercially available preceramic polymer and poly(methyl methacrylate) microbeads acting as a sacrificial filler. Microfoams having cell sizes in the range of 10−150 μm and cell window sizes in the range 10−50 μm were prepared. To test the applicability of…
The translational motion of a solid sphere near a deformable fluid interface is studied in the low Reynolds number regime. In this problem, the fluid flow driven by the sphere is dynamically coupled to the instantaneous conformation of the interface. Using a two-dimensional Fourier transform technique, we are able to…
A versatile, vacuum-ultraviolet-assisted macroscopic fabrication of hexagonally arranged Ag-nanoparticle arrays with controlled periodicity by using phase-segregated amphiphilic diblock copolymer films as templates is demonstrated on either flexible or rigid substrates. After Ag+ is selectively incorporated into the f…
Well stacked: A liquid-crystalline material with crystalline π stacks has been synthesized in which the room-temperature liquid-crystalline phase consists of alternating 2D-crystalline mesogen layers and liquidlike alkyl layers. A long-range ordered layer structure forms as a consequence of the resulting microsegregat…
The synthesis of dendritic dipeptides (4-3,4-3,5)12G2-CH2-Boc-L-Tyr-X-OMe where X = Gly, L-Val, L-Leu, L-Ile, L-Phe, and L-Pro is reported. Their self-assembly in bulk and in solution and the structural and retrostructural analysis of their periodic assemblies were compared to those of the previously reported and curr…
This work reports on a combinational methodology to CaWO 4 nanocrystals of controllable particle sizes for comprehension of particle size dependences of physical properties. Citric acid as a capping molecule restricted the growth of CaWO 4 nanocrystals and gave a small particle size of 3.6 nm at room temperature at pH…
Oriented peptide amphiphile-based nanoribbons with a crystal-like molecular order are prepared by application of a strong magnetic field. The (supra)molecular order is transferred on a polymer backbone formed within the assemblies, which is reflected in the highly anisotropic optical properties of the material, as sho…
The in vitro responses of Schwann cells (RT4-D6P2T, a schwannoma cell line derived from a chemically induced rat peripheral neurotumor) on various types of electrospun fibrous scaffolds of some commercially available biocompatible and biodegradable polymers, i.e., poly(3-hydroxybutyrate) (PHB), poly(3-hydroxybutyrate-…
In this communication, we demonstrate that polyoxomolybdates can activate sp 3 C−H bonds in aliphatic amines. Unexpectedly, a carbon−carbon double bond is formed from two aliphatic primary amines via the activation and dehydrogenative coupling of two sp 3 C−H bonds near the nitrogen atom bearing a hexamolybdate. Detai…
Carbon-nanotube-reinforced, single electrospun PMMA nanofibers (see figure) exhibit an improved Young's modulus and tensile strength relative to unreinforced PMMA nanofibers. The Young's modulus data fits well with the theoretical prediction of the Halpin–Tsai equation. The tensile strength data shows a relatively lar…
Scientific knowledge of how zeolites, a unique classification of microporous aluminosilicates, undergo dissolution in aqueous hydrochloric acid solutions is limited. Understanding the dissolution of zeolites is fundamental to a number of processes occurring in nature and throughout industry. To better understand the d…
Abstract Recent advances in the design and synthesis of mesostructured and mesoporous materials with nonoxide frameworks are reviewed. Chalcogenides comprise the most important class, and all possible pore arrangements known for silica can be achieved in these materials. The special molecular chemistry that leads to o…
The stability of two-dimensional (2D) layers and membranes is subject of a long standing theoretical debate. According to the so called Mermin-Wagner theorem, long wavelength fluctuations destroy the long-range order for 2D crystals. Similarly, 2D membranes embedded in a 3D space have a tendency to be crumpled. These…
In this paper, we model the evolution and self-assembly of randomly oriented carbon nanotubes (CNTs), grown on a metallic substrate in the form of a thin film for field emission under diode configuration. Despite high output, the current in such a thin film device often decays drastically. The present paper is focused…
The Lifshitz-type formulas describing the free energy and the force of the van der Waals interaction between an atom (molecule) and a single-wall carbon nanotube are obtained. The single-wall nanotube is considered as a cylindrical sheet carrying a two-dimensional free electron gas with appropriate boundary conditions…
Owing to their distinct properties, carbon nanotubes (CNTs) have emerged as promising candidate for field emission devices. It has been found experimentally that the results related to the field emission performance show variability. The design of an efficient field emitting device requires the analysis of the variabi…
We report on the electric measurements of an individual Au nanoparticle with an ultra-high contact resistance of about $10^{19} Ω$. The high-impedance measurements have been carried out by counting the electrons that are transferred onto the particle. In order to do this, a carbon nanotube is used as the electrode for…
Time-resolved FTIR analysis was used to monitor the conformation transition induced by treating regenerated Bombyx mori silk fibroin films and solutions with different concentrations of ethanol. The resulting curves showing the kinetics of the transition for both films and fibroin solutions were influenced by the etha…
The use of an effective intermolecular potential often involves a compromise between more accurate, complex functional forms and more tractable simple representations. To study this choice in detail, we systematically derive coarse-grained isotropic pair potentials that accurately reproduce the oxygen-oxygen radial di…
Single-molecule detection with chemical specificity is a powerful and much desired tool for biology, chemistry, physics, and sensing technologies. Surface-enhanced spectroscopies enable single-molecule studies, yet reliable substrates of adequate sensitivity are in short supply. We present a simple, scaleable substrat…