Materials Literature
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Using a recently established BaTiO3 potential model specifically designed for the calculation of defect energetics, atomistic simulations have been carried out on the intrinsic defect chemistry and Rare Earth (RE3+) doping of hexagonal barium titanate (h-BaTiO3). Five charge compensation schemes have been considered a…
Abstract While significant advances in our understanding of the behavior of engineered nanoparticles in the environment continue, there remains a need to engage the nanoparticle research community directly in the development and evaluation of environmentally benign nanoparticles to ensure that nanomaterial‐based indus…
In previous theoretical analyses, magnetoelectric (ME) coupling coefficient αME of piezoelectric/piezomagnetic laminates for static and dynamic modes is usually regarded as one that is not related to laminates’ sizes (length and width). In micrometer or sub-millimeter ME laminates, the decrease in ME coupling was norm…
Colloidal silica templated mesoporous carbons, which have not only systematically expanded large cage size (5–45 nm) but also controlled window size (5–25 nm), are successfully obtained via spontaneous phase separation of boron species from mixture of carbon precursor, boric acid, and colloidal silica during carboniza…
The current study investigates the magnetic properties of the GdxZn1-xO, with x=0.0625 and 0.0185, doped semiconductor using the full potential (linearized) augmented plane wave plus local orbital method. We show that in contrast to the findings of Shi et al. [J. Appl. Phys. 106, 023910 (2009)], the implementation of…
In recent years, much research has been dedicated to understand and predict the interaction of light with nanostructures, which exhibit a wide variety of interesting physical properties that can be tailored by altering their size, morphology, composition, and environment. One emerging area in nanoscience is the phenom…
Self-heating effects in a molecular beam epitaxy-grown GaN/AlGaN/GaN structure on a single crystalline diamond is investigated. A transient interferometric method, in combination with a three dimensional model, is used to describe a pulsed operation of a transistor-like heater, and a micro-Raman technique is used in a…
In this work, we present research on semimetal-semiconductor nanocomposites grown by molecular beam epitaxy (MBE) for thermoelectric applications. We study several different III-V semiconductors embedded with semimetallic rare earth-group V (RE-V) compounds, but focus is given here to ErSb:In(x)Ga(1−x)Sb as a promisin…
A dendrimer–nanoparticle hybrid scaffold based on robust dithiocarbamate formation provides a controlled drug delivery system. These composite films are non-toxic and can incorporate a variety of guests, providing sustained drug release over multiple uses. The system is highly modular: the release process can be easil…
Transparent ordered mesostructured resin-silica composite monoliths with uniform rectangular shape which fully copies the inner-shape of vessels and size (5 × 3 × 0.3 cm 3 ) are prepared via a facile approach of evaporation induced self-assembly (EISA) without adding any protecting agent by using triblock copolymer Pl…
POMs, Magnete und Co: Das tetramere 36-Wolframato-8-Phosphat [{Co4(OH)3PO4}4(PW9O34)4]28− mit 16 Cobalt(II)-Zentren wurde in einer einfachen Eintopfreaktion hergestellt. Die {Co16(OH)12(PO4)4}8+-Kernstruktur (siehe Bild) zeigt Eigenschaften eines Einzelmolekülmagneten.
The impact of various ZnO templates on the alignment and geometry of wet-chemically grown vertical ZnO nanowire (NW) arrays was investigated. The NWs were seeded at nucleation windows which were patterned in poly(methyl methacrylate)-coated ZnO surfaces using electron beam lithography. This growth approach was shown t…
Using molecular dynamics simulations, we study axial compressive behavior of single-walled carbon nanotubes (SWCNTs) with a wide range of aspect ratios (length to diameter ratio). It is shown that the difference in aspect ratio leads to distinct buckling modes in SWCNTs. Small-aspect-ratio SWCNTs primarily exhibit she…
Grain boundary engineering represents a prospective tool for producing high performance structural and functional materials, including super-strong nanocrystalline materials. There remains a fundamental challenge to experimentally evaluate the inherent strength of grain boundaries providing a higher limit for the stre…
A simple route for the fabrication of a highly ordered surface pattern consisting of reduced graphene oxide (RG-O) platelets is developed, in which RG-O platelets modified with poly(ionic liquid) (PIL) undergo a spontaneous self-assembly process as a result of the controlled solvent evaporation.
An achiral nematic liquid crystal was doped with a small quantity of carbon nanotubes having a net chirality, and the mixture was found to exhibit an average mechanical twist over macroscopic dimensions. The nanotube-induced chiral pitch length P was determined as a function of the average nanotube concentration by me…
We demonstrate the use of binary colloidal assemblies as lithographic masks to generate tunable Au patterns on SiO(2) substrates with dimensions ranging from micrometers to nanometers. Such patterns can be modified with different chemistries to create patterns with well-defined sites for selective adsorption of protei…
The shape of monolayer-protected Au38 clusters on the sub-nanometer scale is obtained by spherical aberration-corrected scanning transmission electron microscopy under optimized experimental imaging conditions. The cluster shape is generally retained between frames, and statistical analysis of the shape population id…
Interest in the magnetic properties of the ordered equiatomic alloy FeRh has been revived in recent years due to potential applications in heat assisted magnetic recording. This is based on the existence of a first order hysteretic phase transition from strongly anisotropic antiferromagnet (AF) to relatively isotropic…
Magnetoelectric effect in composite materials results from the combination of piezoelectric and magnetostrictive effects. This paper focuses on the development of a harmonic finite element formulation for such coupled problems, taking into account the nonlinearity of magnetostrictive behavior. An application to a magn…