Materials Literature
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Liquid flow propelled by capillary forces is one of the most important transport mechanisms in porous environments. It is governed by a fascinating interplay of interfacial, viscous drag as well as gravitational forces which liquids encounter upon invasion into geometries with often complex topologies, such as capilla…
We study pulse propagation in one-dimensional chains of spherical granules decorated with small randomly-sized granules placed between bigger monodisperse ones. Such "designer chains" are of interest in efforts to control the behavior of the pulse so as to optimize its propagation or attenuation, depending on the desi…
Abstract A simple approach to deposit multiwalled carbon nanotube (MWNT) networks onto glass fiber surfaces achieving semiconductive MWNT–glass fibers is reported, along with application of fiber/polymer interphases as in‐situ multifunctional sensors. This approach demonstrates for the first time that the techniques o…
A simple density gradient ultracentrifuge separation method has been developed for sorting chemically modified graphene (CMG) by sheet size and surface chemistry in just a few minutes. By optimizing the parameters, including the density gradient and centrifugation time, CMG sheets with specific size ranges and optical…
Hollow Cu2O nanostructures with uniform size (see SEM and TEM images) were obtained by oxidative etching of truncated octahedral particle precursors. A unique feature of the as-synthesized nanoframes is that the six {100} faces are absent, and thus they are constructed of eight hexagonal {111} faces, which are expecte…
A high-capacity hydrogen storage medium---Al-adsorbed graphene---is proposed based on density-functional theory calculations. We find that a graphene layer with Al adsorbed on both sides can store hydrogen up to $13.79\text{ }\text{wt}\text{ }\mathrm{%}$ with average adsorption energy $\ensuremath{-}0.193\text{ }\text…
Abstract In order to improve the extraction of nanocrystalline cellulose (NCC) from sulfuric acid hydrolysis of chemical pulps, we have studied the effect of hydrolysis conditions on the degree of polymerization (DP), the extent of sulfation, morphological, and solid‐state characteristics of the extracted materials vi…
Highly elastic and electrically conductive composite sheets are prepared by infiltration of MWNT forests with polyurethane binder. After initial pretreatment, the composite provides highly reproducible changes in resistivity at elongations up to 40%. Almost no degradation in electrical properties and a linear dependen…
Ni(OH)(2) nanocrystals grown on graphene sheets with various degrees of oxidation are investigated as electrochemical pseudocapacitor materials for potential energy storage applications. Single-crystalline Ni(OH)(2) hexagonal nanoplates directly grown on lightly oxidized, electrically conducting graphene sheets (GS) e…
The main purpose of this special collection was to gather together up-to-date knowledge from scientists, researchers and technologists in order to review the status of processing technologies, materials development, emerging applications and economics/affordability issues.The resultant scope is necessarily broad: cont…
"Orthobrochantite", IMA 78–64, was originally approved by the Commission on New Minerals, Nomenclature and Classification (IMA) as the orthorhombic polymorph of brochantite. Described by Wilson W. Crook III and Stanley G. Oswald from the Douglas Hill mine, Yerington, Nevada, USA, the mineral description was never form…
Abstract Zinc oxide thin films have been fabricated by spray pyrolysis, reactive e‐beam, and rf magnetron sputtering techniques. Structural, optical, and electrical properties have been compared in order to clarify the characteristics of each technique. X‐ray diffraction measurements have shown that ZnO films deposite…
Acylphosphatase is a small enzyme that catalyzes the hydrolysis of acyl phosphates. Here, we present the solution structure of acylphosphatase from Bacillus subtilis (BsAcP), the first from a Gram-positive bacterium. We found that its active site is disordered, whereas it converted to an ordered state upon ligand bind…
In situ transmission electron microscopy observations of ${\text{Cd}}_{6}\text{Eu}$ and ${\text{Cd}}_{6}\text{Ce}$ crystals show that the crystals undergo a structural phase transition from a face-centered cubic or a primitive cubic lattice to a body-centered cubic lattice at high temperatures, respectively. The phase…
In the present communication we report the fabrication a unique core-shell inorganic nanomaterial with potential therapeutic and diagnostic functions. It contains an iron-cobalt (FeCo) core that demonstrates MRI contrast property and a thin nanoshell of gold that inhibits the function of a pro-angiogenic growth factor…
We study stability and distortions of liquid crystal nematic order in a cell with a random heterogeneous substrate. Modeling this system as a bulk xy model with quenched disorder confined to a surface, we find that nematic order is marginally unstable to such surface pinning. We compute the length scale beyond which n…
We present the results of discontinuous molecular dynamics (DMD) computer simulations aimed at understanding the role of protein-like copolymers (PLCs) as compatibilizing agents for a polymer blend containing two incompatible homopolymers. The effectiveness of PLCs to act as compatibilizers is compared with that of bl…
Effects of heating conditions on the microstructure and superconducting properties of Sr0.6K0.4Fe2As2 , Zhang, Zhiyu, Qi, Yanpeng, Wang, Lei, Gao, Zhaoshun, Wang, Dongliang, Zhang, Xianping, Ma, Yanwei
Abstract Novel complexes between methyltrioxorhenium (MTO) and bis(fluorous‐ponytailed) 2,2′‐bipyridines (bpy‐F n ) were synthesized and used for the oxidation of alkenes with hydrogen peroxide under fluorous catalysis. High conversions and yields of the corresponding epoxides were obtained.
Here, we show that droplet deposition of 5 nm Ag nanocrystals induces the formation of two bidimensionnal arrays differing by their level of long-range ordering. This is valid for the alkanethiol/solvent combinations using decanethiol or dodecanethiol as the coating agent and hexane, octane, decane, or dodecane as the…