Materials Literature
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We describe a simple, reliable, and reproducible fabrication technique for a high-order spiral phase plate with high power efficiency 86%. The performance of the fabricated Spiral Phase Plate (SPP) is verified by using vortex characteristics of fraunhofer and fresnel diffractions of a finite-radius plane wave, which i…
The volume phase holographic (VPH) transmission grating recorded in dichromate gelatin (DCG) with a specific spectral coverage from 420 nm to 760 nm is designed for a novel prism-grating-prism imaging spectrometer. Based on the Rigorous Coupled-Wave Analysis, its performances are predicted and analyzed. The grating is…
The hexagonal cell parametersaandcof β-quartz have been determined from a 00.1 β-quartz neutron multiple diffractionUmweganregungpattern measured at 1003 K. Owing to the high density of multiple diffraction peaks in the indexing of the pattern, contrasting with the low density of experimental peaks, a procedure to cor…
In this work, the characteristics of the subwavelength patterning through periodic metal gratings are discussed. By incorporating different structures of metal gratings, the quality improvements in subwavelength pattern generation are observed in terms of pattern resolution, uniformity and visibility. By using Ag and…
Abstract Treatment of mesoporous silica SBA‐15 in refluxing thionyl chloride generates novel surface‐chlorinated mesoporous silica materials which are found to be useful recyclable catalysts for the selective Beckmann rearrangement.
Abstract— The horizontal chevron defect found in a half‐V‐mode ferroelectric‐liquid‐crystal (HV‐FLC) device can be suppressed by lowering the FLC's total free energy. The energy levels between spontaneous polarization (PS) up and down domains were degenerated by asymmetrical‐alignment treatments. The difference in the…
티타늄 표면처리방법 중 gold 코팅, TiN 코팅, 그리고 전용결합재를 복합적으로 사용하여 티타늄과 세라믹의 결합강도에 미치는 영향을 분석하고자 하였다. 티타늄과 세라믹의 3점 굽힘 결합강도를 측정한 결과, TiN 코팅과 전용결합재로 처리한 SPTB군이 $72.20({\pm}5.25)MPa$ 로 가장 높게 나타났으며, 전용결합재로 처리한 SPB군( $67.66({\pm}12.10)MPa$ ), gold 코팅과 전용결합재로 처리한 SPGB군( $46.95({\pm}12.48)MPa$ ), 코팅과 전용결합재로 처리하지 않은 SP군 $(43.80({\pm}5.12)MP…
Abstract Andre Geim und Konstantin Novoselov erhalten den diesjährigen Nobelpreis für Physik für ihre “bahnbrechenden Experimente mit dem zweidimensionalen Material Graphen.”
In this article, the authors report for the first time a route to the realization of scalable sub-100 nm Cu-based T-gates using a fully subtractive, “silicon-compatible” process flow. High resolution electron beam lithography and a low-damage RIE etch process are used to transfer a 50 nm line into ICP-CVD silicon nitr…
Mesoporous MCM-41 silica-immobilized aluminum chloride was employed as a new catalyst for cleaving methylchlorodisilanes to methylchloromonosilanes. The parent and AlCl3-grafted MCM-41 samples were characterized by X-ray powder diffraction, N2 sorption, and EDAX. The nature and concentration of the acid sites of AlCl3…
The application of transformation optical techniques to photonic crystal-like dielectric structures has facilitated the creation of invisibility cloaks that operate at optical wavelengths. In this article, the authors present the fabrication processes for an all-dielectric ground plane cloak structure that consists of…
Undoped SBCNTFETs have a unique characteristic in that they can automatically adjust themselves as p-type or n-type transistors based on the applied biases. Introduced is a new XOR gate based on the abovementioned feature for the first time and its correct function is shown using a new method and also by means of HSPI…
Abstract— Highly efficient white organic light‐emitting devices have been fabricated by doping phosphorescent orange and blue emitters into the separate layers of a single host. The efficiency and electroluminescence spectrum were strongly affected by the sequence of doped layers. The phosphorescent white devices exhi…
We study photon diffusion in a one-dimensional model foam composed of thin films and Plateau borders. Each thin film or Plateau border is characterized by its own intensity transmittance. We relate ${l}_{\text{Foam}}^{\ensuremath{\ast}}$, the transport-mean-free path of photons diffusing in the foam, to the foam micro…
Seven encapsulants with operating temperatures up to 250°C were surveyed for use in planar packages for wide-bandgap dice. Two of the encapsulants failed processability test because they were not able to flow, and another two failed because they induced voids or cracks after curing. The dielectric results of the remai…
Abstract The facial selectivity of 2,3‐dioxabicyclo[2.2.2]oct‐5‐ene in cycloaddition reactions is distressingly variable and akin to that of 2‐oxa‐3‐azabicyclo[2.2.2]oct‐5‐ene derivatives. Osmilation takes place on the face anti to the dihetero bridge, while cycloaddition of butadiene affords exclusively the syn cyclo…
X-ray scattering measurements of an expanded liquid Se(80)Te(20) mixture in the temperature range between 300 and 1000 °C and at pressures of 10, 200, and 1600 bar have been carried out. The reverse Monte Carlo simulation and Voronoi-Delaunay void analyses have been applied to clarify the relationship between the void…
A facile approach for the fabrication of hollow carbon/anatase titania (C/TiO2) is demonstrated. The employed protocol involves the coating of silica template beads with layers of carbon. Furthermore, anatase titania is coated on SiO2/C through a sol–gel approach, followed by hydrothermal treatment at 180°C for 12 h,…
The authors report a detailed study on the deposition because of scattered Ga ions during the focused ion beam chemical vapour deposition (FIB-CVD). The scattered ions strike the surface of the substrate nearby the base of the structure being fabricated by the primary ions, and decompose the organometallic molecules a…
The thermal behaviour of metal soaps of Trichosanthes cucumerina seed oil at 433, 453 and 473K was investigated and the thermodynamic parameters of the decomposition process determined.The kinetics of the decomposition was studied thermogravimetrically at various temperatures.The rates of the first stage decomposition…