Materials Literature
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We propose a model for the pair of electromagnon excitations observed in the class of multiferroic materials $R{\text{MnO}}_{3}$ ($R$ is a rare-earth ion). The model is based on a harmonic cycloid ground state interacting with a zone-edge magnon and its twin excitation separated in momentum space by two times the cycl…
Thiol-yne click chemistry is demonstrated as a modular platform for rapid and practical fabrication of highly functional, multicomponent surfaces under ambient conditions. The principle is illustrated using a postmodification strategy in which poly(propargyl methacrylate) brushes were generated via surface-initiated p…
This work evaluates the cytotoxicity of spherical mesoporous silica (MS) nano- and microparticles and investigates the effects of particle size, concentration, biodegradation products of MS, residual surfactant, and surfactant removal by extraction and calcination on the cytotoxicity. The results from the intracellula…
CeO takes charge: Ceria grows forming small islands on terraces (2–5 nm, CeOx-I) and large islands on steps of a copper substrate (30–50 nm, CeOx-II; see scheme; 100×100 nm2). The resulting CeOx/Cu(111) systems display an extraordinary water-gas shift activity and illustrate the role that an oxide can play in improvin…
The nematic phase of discotic liquid crystals, although rarely observed, has made very significant progress over the past three decades since their discovery. It has made its way from a mere scientific curiosity to application in commodities. The negative birefringence films formed by polymerized nematic discotic liqu…
The widespread use of silver nanoparticles (Ag-NPs) in commercial products, especially textiles, will likely result in an unknown spread of Ag into the environment. The quantification and characterization of the Ag released from nano-Ag-products is an important parameter needed to predict the effect of Ag-NPs on the e…
Graphene sheets, which possess unique nanostructure and a variety of fascinating properties, are considered as promising nanoscale building blocks of new nanocomposites, namely as a support material for the dispersion of metal nanoparticles. One of the methodologies used to prepare graphene sheets is the chemical exfo…
The production of functional nanostructured materials starting from cheap natural precursors using environmentally friendly processes is a highly attractive subject in material chemistry today. Recently, much attention has been focused on the use of plant biomass to produce functional carbonaceous materials, encompass…
Lanthanide-doped nanoparticles capable of (up)converting near-infrared (NIR) light to higher energies via an anti-Stokes process known as upconversion have demonstrated extraordinary potential in biological applications on the virtue that background fluorescence is near-zero. To maximize the intensity of the upconvert…
Abstract In this study, effects of selected factors on selected properties of carbon resin electrodes (CRE) have been investigated. CRE were developed from used dry cells and resin using non‐heat‐treatment process. Selected properties (density, electrical resistance, microstructure, hygroscopy, stability moisture cont…
A microscopic theory of longitudinal sound velocity in a manganite system is reported here. The manganite system is described by a model Hamiltonian consisting of charge density wave (CDW) interaction in the e(g) band, an exchange interaction between spins of the itinerant e(g) band electrons and the core t(2g) electr…
Summary New mono- and diamine compounds were synthesized from dodecylamine and 1,12-dodacanediamine and evaluated as acid corrosion inhibitors for low-carbon steel. The inhibition behavior of these compounds was examined using gravimetric and electrochemical methods (linear polarization and Tafel plot). Weight-loss te…
By means of first-principles calculations within the density-functional theory, we find that stable face-centered-cubic (fcc) ${\text{K}}_{3}{\text{B}}_{80}$ and ${\text{Mg}}_{3}{\text{B}}_{80}$ solids can be formed. For both solids, two possibly stable geometrical phases (identified as phase $A$ and phase $B$) with d…
Abstract A series of copper and zinc mixed oxides composed of equimolar ratio and treated with 0.05 Al 2 O 3 /mol catalyst has been prepared by coprecipitation method using their nitrates in presence of 1 M NaOH solution. The precipitation was carried out at a pH 9.5 and 50°C. The results revealed that the bulk of var…
The N-substitution reactions of 20-π-electron β-tetrakis(trifluoromethyl)-meso-tetraphenylporphyrin 2 with α,ω-dibromoalkanes in N,N-dimethylformamide at room temperature in the presence of various bases gave a variety of N-substituted isophlorins, the nature of which depended on the chain length of α,ω-dibromoalkanes…
We synthesized tetragonal α-FeSe by melting a powder mixture of iron and selenium at high pressure. Subsequent annealing at normal pressure results in removing traces of hexagonal β-FeSe, formation of a rather sharp transition to a superconducting state at T(c)∼7 K, and the appearance of a magnetic transition near T(M…
This paper reports an analysis of the structure and heat stability of two different collagen gels: conventional collagen gel (neutral gel) and gel without collagen fibrils (acidic gel), previously reported. We performed differential scanning calorimetry (DSC), observations by scanning electron microscope (SEM), observ…
High-quality nanostructured Zn x Cd 1− x S has been synthesized through a method of two-step thermal evaporation. The typical morphologies of the nanomaterials were investigated by SEM and TEM. The first step of synthesis is the preparation of ZnS nanoribbons. With ZnS nanoribbons being used as templates, a series of…
Na 0.3 WO 3 1D nanostructure forms (nanorods and nanobelts) were grown by a solid–liquid–solid mechanism from a 40 nm sputtered tungsten film deposited on a soda-lime substrate and annealed at 700 °C in a tubular furnace in N 2 ambient. The morphology, structure, composition and chemical state of the prepared nanostru…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTLiquid Crystalline Features of Optically Active Poly(methylene-1,3-cyclopentane)Naofumi Naga*†, Hajime Shimura†, and Masato Sone‡View Author Information† Department of Applied Chemistry, Materials Science Course, College of Engineer…