Materials Literature
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Charge-orbital ordering is commonly present in complex transition metal oxides and offers interesting opportunities for novel electronic devices. In this work, we demonstrate for the first time that the magnetization states of the spin valve can be directly manipulated by charge-orbital ordering. We investigate the in…
The aim of this study was to investigate whether ZK60, an extruded magnesium alloy, reacts in vivo with an appropriate host response, and to investigate how microarc oxidation treatment influences this in vivo corrosion behavior. Twelve cylinders were machined from as-extruded ZK60, with six cylinders treated with MAO…
An all-carbon-based field effect transistor (FET) was fabricated on flexible polyethylene terephthalate substrates by the aerosol jet printing method described in this paper. Three different types of homogeneous conductive inks were made and then printed layer-by-layer to form the FET chips. The conducting-reduced gra…
This study investigated the relationship between the extensional rheological behaviors and the foamability of polypropylenes (PPs). Both the shear and extensional rheological properties of four types of PPs with different molecular structures (linear PP, linear PP with high-molecular component, long-chain-branched PP,…
Polylactic acid is an interesting biodegradable and bioabsorbable material, and is produced from lactic acid, either by the direct polycondensation of lactic acid or via the ring-opening polymerization (ROP) of lactide. A future target of it is to improve some of the polyester properties for specific biomedical applic…
We have used first-principles methods to study the geometries and electronic structures of hydrogen (H), fluorine (F), chlorine (Cl), and hydroxyl (OH) terminated armchair graphene nanoribbons (H-AGNRs, F-AGNRs, Cl-AGNRs, and OH-AGNRs) with ribbon widths N = 7 and 19. The most stable geometries of H-AGNRs have planar…
Sintered ceramics of Lu 2 O 3:Pr,Hf storage phosphor were prepared and their spectroscopic properties were evaluated. It was shown that during irradiation with X-rays as well as with short UV radiation, the material was able to accumulate energy, which could thereafter be recovered by thermal stimulation in the range…
Self-assemblyings of surfactant-encapsulated Wells-Dawson polyoxometalates (SEPs) nanobuilding blocks in butanone and esters yielded supramolecular gels showing thermo and photo responsive properties. The gels can be further polymerized if unsaturated esters were used and subsequently electrospinned into nanowires and…
We investigate transmission characteristics and sheet conductivity of mono- to multi-layer graphene deposited on quartz in the terahertz (THz) frequency region. The free carrier absorption and Fabry-Perot interference between graphene layers give rise to nonlinear decrease of THz transmission from 76.7% to 27% for mon…
A facile vacuum-assisted vapor deposition process has been developed to control the pore size of ordered mesoporous silica materials in a stepwise manner with angstrom precision, providing an unprecedented paradigm for screening a designer hydrophobic drug nanocarrier with optimized pore diameter to maximize drug solu…
We present the results of inelastic x-ray scattering for magnetite and analyze the energies and widths of the phonon modes with different symmetries in a broad range of temperature 125 < T < 293 K. The phonon modes with X(4) and Δ(5) symmetries broaden in a nonlinear way with decreasing T when the Verwey transition is…
Motivated by the recent indications of ferromagnetism in transition metal oxide heterostructures, we propose a possible mechanism to generate ferromagnetism for itinerant t(2g) systems in two spatial dimensions that does not rely on the coupling between local moments and conduction electrons. We particularly emphasize…
The metallic materials used for implantable medical devices are predominantly stainless steels, Ti and its alloys, and Co-Cr alloys. The corrosion resistance of each of these materials is associated with a passive oxide film on its surface. Since corrosion resistance is crucial to implant performance, considerable eff…
Tungsten (W) incorporated Ga2O3 films were produced by co-sputter deposition. W-concentration was varied by the applied sputtering-power. The structure and optical properties of W-incorporated Ga2O3 films were evaluated using X-ray diffraction, scanning electron microscopy, and spectrophotometric measurements. No seco…
The demand for scaffolds comprised of natural materials such as collagen has increased in recent years. However, many scaffolds rely on chemical or physical modifications in order to comply with the necessary requirements for biomedical engineering. We evaluated the in vivo biocompatibility and biodegradation of a nov…
We describe here the first report for developing microphase-separated structures in poly(styrene- block -isoprene) (PS- b -PI) block copolymer nanoparticles by microwave annealing in a nonsolvent, water. A random structure in the nanoparticles successfully transformed to thermodynamically stable structures within seve…
Device-scale thin films of highly oriented (in-plane) colloidal nanorods are made available by using a simple coating process involving thixotropic rod gel suspensions. Application of this process to LaPO₄ nanorods leads to films exhibiting outstanding anisotropic optical properties, such as a remarkably large birefri…
In situ homeotropic alignment is achieved by photochromic trans- to cis-isomerization of an azo-dye doped in a nematic host. The augmented dipole moment of the cis-isomer formed under UV-irradiation expedites molecular assembly into crystalline aggregates. Subsequent deposition of the aggregates creates a roughened su…
We report a versatile method for building colloidal molecules from particles that are isotropic in geometry and interfacial properties. When an external alternating-current electric field is applied, the particles experience anisotropic interactions that lead to the formation of colloidal oligomers via different assem…
The selective functionalization of carbon nanotube surfaces is crucial for many potential applications of these materials. For this purpose several oxidants, among other substances, are used. The aim is to reach a large degree of functionalization which depends on the oxidant character of the reagent. For this reason…