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 formation of ordered phases of acid-hydrolyzed cellulose suspensions was studied as a function of cellulose crystallite concentration and added electrolyte (HCl, NaCl, and KCl) concentrations. A chiral nematic phase formed when the suspension concentration was higher than 5.14 × 10 -6 nm -3 in water. For biphasic…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCarbide and Nitride Overlayers on Early Transition Metal Surfaces: Preparation, Characterization, and ReactivitiesJingguang G. ChenView Author Information Corporate Research Laboratories, Exxon Research and Engineering Company, Annandale, New Jersey 08801 Cite this: Chem. Re…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTCalix[4]pyrroles: Old Yet New Anion-Binding AgentsPhilip A. Gale, Jonathan L. Sessler, Vladimír Král, and Vincent LynchView Author Information Department of Chemistry and Biochemistry University of Texas at Austin, Austin, Texas 78712-1167 Cite this: J. Am. Chem. Soc.…
Carbon dioxide reforming of methane produces synthesis gas with a low hydrogen to carbon monoxide ratio, which is desirable for many industrial synthesis processes. This reaction also has very important environmental implications since both methane and carbon dioxide contribute to the greenhouse effect. Converting the…
Super water-repellent surfaces showing a contact angle of 174° for water droplets have been made of alkylketene dimer (AKD). Water droplets roll around without attachment on the super water-repellent surfaces when tilted slightly. The AKD is a kind of wax and forms spontaneously a fractal structure in its surfaces by…
A layered protonic titanate of lepidocrocite-type, H x Ti 2- x /4 □ x /4 O 4 ·H 2 O ( x ∼ 0.7; □, vacancy), has been exfoliated on the action of an aqueous solution of tetrabutylammonium (hereafter TBA) hydroxide, which resulted in a stable colloidal suspension. A colloidal aggregate centrifuged from the suspension wa…
The static and dynamic properties of polymer-layered silicate nanocomposites are discussed in the context of polymers in confined media. Despite the topological constraints imposed by the host lattice, mass transport of the polymer into the silicate layers (at least in the case of essentially non-polar polystyrene) ap…
The science describing semiconductor−liquid interfaces is highly interdisciplinary, broad in scope, interesting, and of importance to various emerging technologies. We present a review of the basic physicochemical principles of semiconductor−liquid interfaces, including their historical development, and describe the m…
We report on the synthesis and characterization of 25−70 Å diameter amine-capped gold nanocrystals. In particular, we show how these particles can be prepared by a simple procedure and confirm the particle composition (including the identity of the amine surface passivant) through several materials characterization te…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConjugated Macromolecules of Precise Length and Constitution. Organic Synthesis for the Construction of NanoarchitecturesJames M. TourView Author Information Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208 Cite this: Che…
A highly ordered gold nanodot array was fabricated by vacuum evaporation using an anodic porous alumina membrane with through-holes of nanometer scale as a mask. This technique resulted in an orderly arrangement of Au dots with a diameter of approximately 40 nm over a large area on a Si substrate.
Organic-inorganic hybrids appear as a creative alternative for obtaining new materials with unusual features. This is related to their diphasic structures, leading to multifunctional materials. The low-temperature processes which are used to synthesize such structures provide a wide versatility in the design of the co…
Organic/inorganic hybrid materials prepared by the sol−gel approach have rapidly become a fascinating new field of research in materials science. The explosion of activity in this area in the past decade has made tremendous progress in both the fundamental understanding of the sol−gel process and the development and a…
The synthesis of a banana-shaped molecule is reported and it is found that the smectic phase which it forms is biaxial with the molecules packed in the best direction into a layer. Because of this characteristic packing, spontaneous polarization appears parallel to the layer and switches on reversal of an applied elec…
Introduction. PART I: MATERIAL PROPERTIES AND PRODUCT ATTRIBUTES.The Nature of Materials. Mechanical Properties of Materials. Physical Properties of Materials. Dimensions, Tolerances, and Surfaces. PART II: ENGINEERING MATERIALS. Metals. Ceramics. Polymers.Composite Materials. PART III: SOLIDIFICATION PROCESSES. Funda…
This paper reviews a relatively new method for preparing nanomaterials: membrane-based synthesis. This method entails the synthesis of the desired material within the pores of a nanoporous membrane. Because the membranes employed contain cylindrical pores of uniform diameter, monodisperse nanocylinders of the desired…
The low-temperature formation of liquid-crystal-like arrays made up of molecular complexes formed between molecular inorganic species and amphiphilic organic molecules is a convenient approach for the synthesis of mesostructure materials. This paper examines how the molecular shapes of covalent organosilanes, quaterna…
Wettability of fractal surfaces has been studied both theoretically and experimentally. The contact angle of a liquid droplet placed on a fractal surface is expressed as a function of the fractal dimension, the range of fractal behavior, and the contacting ratio of the surface. The result shows that fractal surfaces c…
A mean-field phase diagram for conformationally symmetric diblock melts using the standard Gaussian polymer model is presented. Our calculation, which traverses the weak- to strong-segregation regimes, is free of traditional approximations. Regions of stability are determined for disordered (DIS) melts and for ordered…
Gold colloids have been homogeneously coated with silica using the silane coupling agent (3-aminopropyl)trimethoxysilane as a primer to render the gold surface vitreophilic. After the formation of a thin silica layer in aqueous solution, the particles can be transferred into ethanol for further growth using the Stöber…