Materials Literature
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We measured the macroscopic Seebeck coefficient of silicon nanowires (SiNWs), organized in a highly interconnected networks on large areas (order of mm(2)). The fabricated networks are very reliable with respect to random nanowire failure and are electrically and thermally equivalent to many SiNWs placed in parallel b…
This letter reports an unexpected observation in the purification of ultrasmall (<2 nm) thiolate-protected Ag nanoclusters (NCs) via a common separation technique (e.g., desalting column and ultrafiltration), where the nonluminescent Ag NCs were spontaneously transformed to highly luminescent NCs during the separation…
It is shown that for the hopping regime, the thermopowers in both finite two- and three-terminal systems are governed by the edges of the samples. This is due to the fact that the energy transfer between a transport electron and a conducting terminal is determined by the site most strongly coupled to that terminal. On…
The magnetic properties of porous silicon/Fe3O4 composites are investigated with respect to the adjustability of the blocking temperature along with an evaluation of any size-dependent changes in cytocompatibility. Fe3O4-nanoparticles have been infiltrated within mesoporous silicon, resulting in a system with tunable…
In this article, perovskite‐structured BiFeO 3 – Bi ( Zn 1/2 Ti 1/2 ) O 3 – PbTiO 3 ( BF – BZT – PT ) ternary solid solutions were prepared with traditional solid‐state reaction method and demonstrated to exhibit a coexistent phase boundary ( CPB ) with Curie temperature of T C ~700°C in the form of ceramics with micr…
The extent to which lamellae-forming polystyrene- block -poly(methyl methacrylate) (PS- b -PMMA, bulk period L 0 = 48 nm) can be directed to assemble on chemically nanopatterned striped surfaces (period L S ), with few defects and with domains registered to and extending vertically away from the underlying pattern, wa…
We present results of few-layer graphene synthesis directly on SiO2/Si substrate by negative carbon ion implantation in Ni catalyst films on the top of SiO2/Si substrate. Negative carbon ions at 20 keV were implanted into Ni films with doses of (4–16) × 1015 cm−2. The implanted carbon atoms dissolved in Ni at an eleva…
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…