Materials Literature
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Nonlinear optical(NLO) properties of the colloidal solutions of chemically synthesized undoped and Mn2+ doped ZnS Quantum Dots(QDs) in methanol are measured by using a Q-switched 10 ns pulsed Nd∶YAG laser radiation by the Z-scan technique.The nanostructures of the synthesized materials are characterized by using diffe…
光電極を用いた水分解による水素製造法は二酸化炭素をほとんど副生せずに太陽光エネルギーを水素に変換するための方法であり、その活用が期待されている。しかし、光電極に用いる光触媒に関する研究は盛んに行われている一方、反応器に関する研究はほとんどなされていない。そこで本研究では、光電極による水素製造装置を設計することを目的とした。反応器において高効率な反応を達成するためには、反応器の構造パラメータを反応に対して適切に決定する必要がある。このような反応器の最適設計問題に対して、流体シミュレーションが有効な手段の一つとなる。しかし、流体の流れが反応に有利な状態を形成するように反応器の構造を決定するためには、多くのシミュレーション回数が要求され…
Piezoelectric actuators for dynamic applications must be pre-stressed to avoid tensile stress and to improve their reliability. The actuating behavior of piezoelectric actuators depends strongly on the load characteristics: If the load increases with extension of the piezoelectric ceramic, e.g. when using a classical…
Nano-porous hydroxyapatite (HAp)-DNA composite film modified glassy carbon electrode was prepared by sol-gel one-step method for the first time. DNA was immobilized on the nano-porous HAp film firmly due to its effective adsorbability and biocompatibility and the structure of macromolecule of DNA plays an important ro…
The effect of single-wall carbon nanotubes (SWNTs) on nonlinear optical absorption of D-shaped fibers with versatile the remaining length of the cladding region and the interaction length are investigated. The optical absorption based on SWNTs is induced by the energy bandgap in SWNTs. The bandgap energy depends on th…
The N-doped β-Ga2O3 films were grown on Si and quartz substrates by RF magnetron sputtering in different ammonia partial pressure ratios(from 0% to 30%).The influence of ammonia partial pressure ratio and annealing treatment on the optical and structural properties were studied.The microstructure,optical transmittance…
The basket of transport and storage cask must have not only a structural strength during transport and storage conditions, but also heat removal function. The basket material is also preferable to be light in order to reduce the weight of cask because it is very important to increase the number of fuel assemblies load…
Plating on plastics is useful for manufacturing many plated metal products. When using ABS resin, which is often used for plating, etching pretreatment with chromic acid is conducted. This etchant can dissolve butadiene in ABS, forming rough areas on the surface, which are later filled with metals during plating. The…
Parts having a strength distribution were produced from tailor friction-welded billets consisting steel bars having different quenchabilities. JIS-SCr420 having high quenchability and JIS-S25C having low quenchability were joined by frictional welding. The tailor friction-welded billet was then forged, and the forged…
Femtosecond laser ablation caused PMMA surfaces to become hydrophobic due to the submicron-scale porosity of the ablated surface. Laser-machined zones of altered wettability were accurately replicated using a solvent-resistant mold.
Transparent conducting Ti,Ga co-doped zinc oxide films(TGZO) with high transparency and relatively low resistivity have been successfully prepared by DC magnetron sputtering at room temperature.Micro-structural,optical and electrical properties of TGZO films were investigated.XRD photos indicate that the sputtering pr…
In order to improve the brittleness of Poly(lactic acid) (PLA), the effect of blending several kinds of polyamide 12 (PA12) with PLA through Reactive Processing (RP) method was investigated. During RP, a maleic anhydride-grafted PLA (MAPLA) was synthesized as a pre-compatibilizer before blending PA12. From the result…
This article describes recent progress in organic semiconductor research with ultraviolet photoelectron spectroscopy (UPS). Origins of the energy level alignment at organic-conductor/dielectrics interfaces and the charge mobility in organic semiconductor systems are the most important subjects to be elucidated. Direct…
Multiplexed quantum dots (QDs) have unique spectral emissions with varying wavelength and intensity. An experimentally verified model of the signal and noise power is presented to analyze the limiting factors to reading the spectral emissions.
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Using fourth-order interference, we have measured the relative tunneling delay between photons of opposite handedness through a cholesteric liquid crystal structure. The resulting time delay or advancement can be tuned by tilting the sample.
TiO2 thin films with a W layer to improve photo-functional properties were prepared by a reactive magnetron sputtering method. The W thin layers with 0.4-2.5 nm in thickness were coated onto the TiO2 thin film by the same magnetron sputtering. The surface chemical state of the W coated TiO2 thin films measured by X-ra…
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The purpose of the present study is to evaluate the effect of σ-phase embrittlement on fatigue behavior in high-chromium ferritic stainless steels. When ferritic stainless steels are exposed to the temperature range of 700∼ 800°C, the precipitation of σ-phase occurs. The precipitation brings about the embrittlement of…
A new three-dimensional plasmonic lithography method is presented. The direct writing with an optical beam in a polymeric matrix is demonstrated. The plasmonic structure induced by the light beam can be erased chemically.