Materials Literature
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In this work, electrically conductive polyaniline (PAni) doped with camphorsulfonic acid (CPSA) is blended with poly(L-lactide-co-epsilon-caprolactone) (PLCL), and then electrospun to prepare uniform nanofibers. The CPSA-PAni/PLCL nanofibers show a smooth fiber structure without coarse lumps or beads and consistent fi…
We report on a self-sorting supramolecular fiber formation of photo- and electro-active molecules (p-type oligothiophene and n-type perylene derivatives) toward the development of a photoelectronic conversion system operated by visible light irradiation.
Logical devices based on spin waves offer the potential to avoid dissipation mechanisms that limit devices based on either the charge or spin of mobile electrons. Multiferroic magnetoelectrics, which are materials that combine ferroelectric and magnetic order, allow direct switching of magnetic order and thence of spi…
Abstract This review reports on recent advances in the design of biodegradable polymers built from petroleum and renewable resources using reactive extrusion processing. Reactive extrusion represents a unique tool to manufacture biodegradable polymers upon different types of reactive modification in a cost‐effective w…
One-dimensional structures of nitrogen-rich carbon nitride are synthesized via a thermal evaporation process. The CN atomic rings (s-triazine and/or tri-s-triazine) present in the precursor remain stable during the thermal evaporation and vapor transfer. They act as basic building blocks during the microstructure ass…
The migration of individual Au and Pt atoms in graphene layers (see image) is observed by high-resolution TEM. In situ experiments at 600–700 °C show that two-dimensional diffusion within the plane of the layer and the one-dimensional diffusion along the open edges occurs with activation energies of 2.3–2.5 eV. It is…
We describe the structural, optical, and electrical properties of films of spin-cast, oleate-capped PbSe nanocrystals that are treated thermally or chemically in solutions of hydrazine, methylamine, or pyridine to produce electronically coupled nanocrystal solids. Postdeposition heat treatments trigger nanocrystal sin…
A new method for creating layer-by-layer (LbL) assembled films on any substrate using polymers inspired by the high catechol content of mussel adhesive proteinsis presented. Catechol-derivatized polymers permit LbL assembly on challenging substrates without prior surface preparation. Catechol groups incorporated into…
Manufacturers of clothing articles employ nanosilver (n-Ag) as an antimicrobial agent, but the environmental impacts of n-Ag release from commercial products are unknown. The quantity and form of the nanomaterials released from consumer products should be determined to assess the environmental risks of nanotechnology.…
A newly developed experimental system for measurements of electron emission induced by low energy ions at below low ion flux (10 5 ions s −1 cm −2 ) avoiding the fast emission degradation caused by high ion fluxes (usually applied 10 10 –10 13 ions s −1 cm −2 ) has been established. The method, based on an event-by-ev…
Multicomponent (Ti, Zr, Al, B) silicon oxycarbide glasses and nanocomposite materials were derived after pyrolysis of gel hybrid structures in N2 atmosphere. MTES (methyltriethoxysilane) and PDMS (polydimethylsiloxane) were used as precursors for introducing “organic” SiO2. Transformation of the hybrid structure into…
Open-cell Al O ceramic foams with uniform cell structures and dense cell struts were fabricated by centrifugal slip casting using the plant seeds as the templates. The rheological characteristic of Al O slurries with up to 50 vol.% solid content was investigated. The shrinkage matching between the Al O green compact a…
A wet non-conventional method for preparing aluminophosphate glasses is presented. Aluminophosphate glasses belonging to the oxide system Li2O-BaO-Al2O3-La2O3-P2O5, doped with rare-earth ions (Pr3+, Er3+, Gd3+, and Yb3+) were obtained. The influence of the doping ions on the optical properties of the phosphate glasses…
Dynamic processes in glassy materials with ionic conductivity are extremely important since the ion transport significantly affects their practical performance. Conductivity measurement and dielectric relaxation spectroscopy are powerful techniques that reflect the essential features of the transport and relaxational…
Focused ion beam (FIB) sample preparation was applied to vermiform kaolin minerals to investigate by TEM the morphological evolution and mechanisms of kaolinite-to-dickite transformation during burial diagenesis. A core sample of a K-feldspar bearing arkosic sandstone, collected from the Brent Group sediments of the F…
Abstract The spin Hamiltonian parameters ( g ‐factors and the hyperfine structure constants) and the local structure for the orthorhombic V 4+ in CaYAlO 4 are theoretically studied from the perturbation formulas of these parameters for a 3d 1 ion in orthorhombically distorted octahedra. Based on the present studies, t…
A method for measuring the early stage ion release of glasses was developed in order to gain information on leaching kinetics and chemical resistance of glasses in aqueous environments. A continuous flow-through-reactor was designed in which the aqueous solution is fed through a bed of glass particles and the dissolve…
An evolution of the structure of three glasses of Na2O-Nb2O5-SiO2 system in the course of isothermal heat treatments at 660–700°C and the extinction coefficient of the material were studied. Spinodal phase separation was found to be a primary process followed by precipitation of nano-sized NaNbO3 crystalline phase. It…
As an introduction to this new section, I am honored to have Shawn Cowper, MD, review several studies1-4 from recent nondermatopathology literature that used a variety of approaches to examine whether a causal relationship exists between gadolinium (Gd) and nephrogenic systemic fibrosis (NSF). With many hospitals and…
The structure of a seven oxide aluminoborosilicate simplified nuclear glass, bearing a high amount of neodymium or lanthanum oxide (16 wt%), alkali and alkaline earth cations is studied. Nd3+ or La3+ are supposed to simulate the trivalent lanthanides and minor actinides present in nuclear wastes. In the studied glass…