Materials Literature
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This study systematically investigates the light-extraction efficiency (LEE) of GaN-based thin-film flip-chip light-emitting diodes (TFFC LEDs) with deeply etched photonic crystals (PhC). The optimal structure can be obtained by scanning the structural parameters using a three-dimensional finite-difference time-domain…
An aspargine-glycine-arginine (NGR) peptide modified single-walled carbon nanotubes (SWCNTs) system, developed by a simple non-covalent approach, could be loaded with the anticancer drug tamoxifen (TAM). This TAM-loaded NGR modified SWCNTs (TAM/NGR-SWCNTs) not only retained both optical properties of SWCNTs and cytoto…
This letter proposes a novel high bit density nonvolatile memory using a logic compatible flexible amorphous indium-gallium-zinc oxide (a-IGZO) thin-film transistor (TFT) structure fabricated at low temperature. Before electrical forming, the a-IGZO TFT exhibits excellent transistor performance, including an ON/OFF cu…
The transient pressure process in an interrupter, which determines the gas blasting characteristic of an SF6circuit breaker (CB), is of interest to designers and developers. In this investigation, piezoresistive pressure transducers and thermally and electrically insulating tubes, which damped the reflection of the pr…
Materials with perpendicular magnetic anisotropy can reduce the threshold current density of the current-induced domain wall motion. Co/Ni multilayers show strong perpendicular magnetic anisotropy and therefore it has become a highly potential candidate of current-induced domain wall motion memories. However, the deta…
Simultaneous injection of n-butanol and gasoline through a new system of two injectors directing the sprays towards the back of the intake valve in a spark-ignition engine was tried in lieu of injecting a blend of these fuels through a single injector. This system avoids the problem of phase separation, which is gener…
By choosing exogenous Chlorella vulgaris and native Chlorella vulgaris which were screened from karst areas as study objects, and making comparison of the utilization of Ca2+ and HCO3 − in typical karst water by Chlorella vulgaris of two different origins in a closed system, the relationship between Chlorella vulgaris…
Tantalum oxynitride films can be deposited with a high versatility in composition by reactive sputtering of a tantalum target in Ar/O2/N2 mixtures. In this paper, plasma analysis was performed from simple to more complex Ar/O2/N2 gas mixtures and linked to the layer elemental composition. The presence of two reactive…
The interface potential approach is used to compute the interfacial properties of a model system consisting of SPC/E water at a structureless non-polar surface. Both the spreading and drying versions of the method, in which one focuses on the growth of a thin liquid and vapour film from the surface, respectively, are…
Mesenchymal bone marrow stromal cells may be a source of cells to preseed decellularized biologic mesh materials for improved cellularization and promote a more physiologic tissue after remodeling. Spontaneous differentiation of mesenchymal stromal cells on the decellularized material would be undesirable. Conversely,…
The dynamics of optical nonlinearities in bulk GaN crystal are investigated by a modified time-resolved pump-probe system with phase object at 532 nm under picosecond pulse excitation. The sample's optical nonlinearities can be determined by measuring the normalized transmittance with/without an aperture in the far fi…
In many research areas, the reflective properties of a bulk medium are characterized by its impedance or an impedance-like quantity. Such a quantity is essential for the efficient design of stacked structures such as antireflection coatings and thin-film filters. For 2D photonic crystals and metamaterials, the literat…
Nanostructured materials offer enhanced physicochemical properties because of the large interfacial area. Typically, geopolymers with specifically synthesized nanosized zeolites are a promising material for the sorption of pollutants. The structural characterization of these aluminosilicates, however, continues to be…
The growth of a TiO shell at the surface of TiO2 nanowires (NWs) allowed us to improve the power conversion efficiency of NW-based dye-sensitized solar cells (DSCs) by a factor 2.5. TiO2@TiO core-shell NWs were obtained by a two-step process: First, rutile-phase TiO2 NWs were hydrothermally grown. Second, a hongquiite…
Poly(silafluorene)s (PSFs) are promising light-emitting materials with brilliant solid-state blue luminescence, high quantum efficiency, excellent solubility, and improved thermal and chemical stability. PSFs are reported to have high electron affinity and conductivity originating from σ*-π* conjugation between the σ*…
The atomization-based cutting fluid (ACF) spray system has recently been proposed as a cooling and lubrication solution for machining hard to machine materials (e.g., titanium alloys). On the tool rake face, the ACF spray system forms a thin film from cutting fluid that penetrates into the tool–chip interface to impro…
Light emitters based on Ge quantum dots embedded in modified photonic crystal three defect-long (L3) cavities are fabricated and characterized. Several sharp resonant luminescence peaks dominate the photoluminescence (PL) spectrum at room temperature. The strongest resonant luminescence peak is obtained at 1524 nm. Th…
Hollow iron oxide tetrapods are synthesized by exposing iron precursors to hollow ultrathin PtS tetrapods. Surprisingly, the heterogeneous nucleation and growth of iron takes place exclusively within the PtS interior. Oxidation of the resulting iron tetrapod produces a hollow iron oxide shell via a shape-preserving Ki…
We investigated the transition energy levels of the vacancy defects in gallium nitride by means of a hybrid density functional theory approach (DFT). We show that, in contrast to predictions from a recent study on the level of purely local DFT, the inclusion of screened exchange stabilizes the triply positive charge s…
Application of chondrogenic growth factors is a routine strategy to induce chondrogenesis of hMSCs, but they have economic and safety problems in the long term. It is expected that scaffold material itself could play an important role in chondrogenesis of hMSCs. In this study we tested whether a novel tricalcium phosp…