Materials Literature
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We have synthesized size-controlled Si nanoparticles using multi-hollow discharge plasma CVD and have assembled Si quantum dot-sensitized solar cells which are candidates for multiple exciton generation solar cells of the third generation photovoltaics. We have demonstrated extraction of carriers from Si nanoparticles…
An approach for the preparation of oxy/hydroxy briged Fe(III) clusters that takes advantage of hydrolytic condensations of well defined {Fe(2)hpdta(H(2)O)(4)} building units is presented. Co-ligands such as tripodal H(3)tea or bidentate organic bases such as ethylenediamine (enH(2)) can be used to complete the coordin…
Teflon surfaces exhibiting self-adaptive behaviour with both highly hydrophilic character and strong coordinating properties are prepared in a straightforward manner by physisorption of the fluorophilic copper(II)-carboxylate complex 2.
This section describes the layout of the test setup, the design of the tested cables, and the experimental routines. Six different types of 2124 cable shield termination were tested for leakage current and dielectric strength. The main results can be summarized as follows: (1) Shrink sleeve strongly affects ionization…
We investigate the important role of interface collisions on the thermal conduction behavior, especially on the thermal rectification effect, of the two-segment lattices. In the high-average temperature regime, it is found that the thermal diode effect may be significantly weaken and even eliminated. Meanwhile in the…
Multiblock copolymers with shape-memory capability attracted tremendous interest as promising candidate materials for smart, degradable implants. In the present study the hen's egg-chorioallantoic membrane test (HET-CAM test) was used to investigate the angiogenic properties of a thermoplastic, biodegradable multibloc…
To study fatigue property of 2D plain weave C/SiC composite material at high temperature with oxidation environment,a constant amplitude tension-tension fatigue experiment is taken.During the experiment,the system of high temperature and oxidation is used to oxygenize the specimen.After the experiment,the scanning ele…
ポリフッ化ビニリデン(PVDF)は，I 型，II 型，III 型の 3 つの結晶構造を有し，通常異なる溶媒からキャストして作製される．本報では，1 つの溶媒に対し，キャスト後の溶媒の乾燥温度を変えて溶媒の蒸発速度を制御することで，PVDF の 3 つの結晶構造を作製することを試みた．PVDF をヘキサメチルホスホアミド(HMPA)溶媒に溶解させ，キャスト後の乾燥温度を変えて溶媒の蒸発速度を制御した結果，25～40℃ 乾燥では PVDF I 型，160～170℃ 乾燥では PVDF II 型，80～100℃ 乾燥では PVDF III 型の結晶構造が作製できた．これは，PVDF I 型は溶媒の蒸発速度が遅いときに作製され，II 型は…
Photoluminescence properties of polyvinyl alcohol (PVA) capped ZnS:Mn 2+ nanoparticles are reported. The particles were synthesized using chemical precipitation method. The nanoparticles are characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), ultraviolet-visible (UV/Vis) and photoluminesc…
Electromagnetic metamaterials have emerged as a new class of effective media where exotic properties are determined from structural geometry and dimensions of the basic building blocks, or meta-atoms. Through such a bottom-up approach, metamaterials have found applications in the construction of terahertz functional d…
In many applications the high demands regarding service life of transmission components can be reached only by the application of a customized case hardening. This case hardening process results in a wear resistant surface-layer in combination with a tough core of the component. Howeverasaside-effectthecomponentsgetdi…
Nanoparticles of Eu3+ doped YPO4 have been prepared using ethylene glycol (EG). Ethylene diamine tetra acetic acid (EDTA) is used as a complexing agent. X‐ray diffraction results show that the nanoparticles are crystalline in tetragonal structure. Based on William‐Hall relation, the effective crystallite size and stra…
phosphors were prepared by a Pechini sol-gel process. X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), photoluminescence (PL), cathodoluminescence (CL) spectra, as well as lifetimes were utilized to characterize the synthesized phos…
Gold nanoparticles with silver nanoshells are obtained by synthesizing gold nanorods in a growing solution containing cetyltrimethylammonium bromide, subsequent separation in a concentration gradient of glycerol, and reduction of silver nitrate by ascorbic acid under alkaline conditions in the presence of polyvinylpyr…
Slip cast Y2O3 stabilized Zirconia (8YSZ) ceramics was subjected to Conventional Ramp and Hold (CRH), Rate Controlled (RCS) and Two Stage Sintering (2SS) methodologies. Sintered samples were characterized for their densities and grain size analysis by Scanning Electron Microscopy. The slip cast samples sintered by CRH…
Abstract—To simulate imaging systems, Fourier optics has been applied very successfully to optics for decades. However, when simply moving to indoor millimeter wave imaging systems, some assumptions underlying the Fourier optics may break down, which contribute to the errors by applying Fourier optics. During the revi…
A novel semiconducting biomaterial composed of salt leached poly(lactic-co-glycolic acid) (PLGA) and chloride-doped polypyrrole (PPy–Cl) was created using a simple, yet flexible, synthesis technique. The three-step method consists of (1) spin casting a solution of PLGA-salt, (2) salt leaching combined with pyrrole inf…
The phase-change memory (PCM) technology represents one of the most attractive concepts for next generation data storage. PCM operation is based on the particular properties of a chalcogenide alloy, the ternary compound Ge2Sb2Te5, which is able to perform fast and reversible transitions between a crystalline, high-con…
Upon X-ray irradiation of hypoxic aqueous solution, modified oligodeoxynucleotides (ODNs) bearing a pair of disulfides at both ends of the strand that forms a stem-and-loop structure with a neighboring arrangement of α,ω-bis-disulfides underwent efficient cyclization via an intramolecular exchange reaction at the disu…
This study demonstrated the preparation of a Cr-doped ZnO wurtzite structure without any impurity phases (metallic Zn, Cr, , , etc.) via electrodeposition. The surface morphology, lattice structure, Cr content, chemical binding characteristics, and optical properties of the deposits were examined by field-emission-sca…