Materials Literature
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We propose to construct broadband thin-film polarizers (TFPs) by combining the polarizing regions of long-wave pass and short-wave pass stacks. The polarization bandwidth can be broader than traditional TFPs by roughly a factor of 2. We designed and fabricated two HfO(2)/SiO(2) Brewster's angle TFPs with a high contra…
Due to their reduced dimensions, the mechanical properties of nanostructures may differ substantially from those of bulk materials. Quantifying and understanding the nanomechanical properties of individual nanostructures is thus of tremendous importance both from a fundamental and a technological point of view. Here w…
ADVERTISEMENT RETURN TO ISSUEPREVCommentNEXTComment on "Using Photoelectron Spectroscopy and Quantum Mechanics to Determine d-Band Energies of Metals for Catalytic Applications"Frank Abild-Pedersen†, Anders Nilsson†‡, and Jens K. Nørskov*†§View Author Information† SUNCAT Center for Interface Science and Catalysis, SLA…
Abstract The precipitation behavior of a Nb (0.041 wt%), V (0.11 wt%), and Ti (0.018 wt%) micro‐alloyed steel influenced by a deformation process in the austenite region has been investigated by transmission electron microscopy and atom probe. After solution annealing at 1250°C, nearly the entire Nb and V amount is in…
Femtosecond fluorescence up-conversion technique was employed to reinvestigate the intriguing dependence of fluorescence quantum yield of trans-4-dimethylamino-4(')-nitrostilbene (DNS) on dielectric properties of the media. In polar solvents, such as methanol and acetonitrile, the two time components of the fluorescen…
BACKGROUND: Tk-SP is a member of subtilisin-like serine proteases from a hyperthermophilic archaeon Thermococcus kodakarensis. It has been known that the hyper-stable protease, Tk-SP, could exhibit enzymatic activity even at high temperature and in the presence of chemical denaturants. In this work, the enzymatic acti…
용액 분산법을 이용하여 CNT를 균질하게 분산시켰고, CNT-폴리프로필렌 복합재료 제조를 위해 압출기와 사출기를 사용하였다. CNT 고유의 전도성을 기반으로 CNT-PP 복합재료의 내부 손상을 감지하기 위해 전기저항 측정법을 이용하였다. CNT-PP의 기계적 및 계면 물성을 확인하고 일반 PP와 비교하였다. CNT의 강화 효과로 인하여 CNT를 함유함으로서, PP 기지의 기계적 물성은 더 증가되는 경향을 확인하였다. CNT-PP 복합재료의 내부 손상을 평가하기 위해 파괴 및 굴곡실험을 진행하며, 동시에 발생되는 전기저항 변화도를 감지하여 미세손상을 평가하였다. CN…
Wiley-VCH, Weinheim, 2012. 476 pp., hardcover, € 149.00.—ISBN 978-3527332106
Measurements of lateral bulk heterojunction (BHJ) devices have recently been reported as a means to characterize charge transport and recombination properties within organic photovoltaic (OPV) materials. These structures allow for the direct measurement of the lateral extents of the space charge regions, potential and…
The calcium phosphate coatings for metallic medical implants that are used to replace the bone tissues synthesized by various methods are considered in the structural and morphological aspects. The advantages and shortcomings and the prospects of application of the methods of deposition of such coatings on metal subst…
The uniaxial compression tests of AZ31 magnesium alloy at different strain rates of 0.01-10 s -1 and different deformation temperatures of 523-723 K were performed by using Gleeble-1500 simulator with a maximum strain of 0.916. The influences of deformation temperature and strain rate on the flow stress were investiga…
Abstract The photodegradation of a polystyrene (PS) film was performed by a titanium dioxide (TiO2)/poly(ethylene oxide) (PEO)/methyl linoleate (ML) paint photocatalyst system. The PS surface was catalytically photodegraded by the TiO2/PEO component, and a conjugated carbon–carbon double bond was partially produced. A…
The goal of this work was to determine the integrated molar absorption coefficients of adsorbate vibrations and to use them as a measure of the activation of chemical bonds by the catalyst surface. For this purpose, an apparatus was built for the simultaneous measurement of transmission IR spectra of the adsorbate and…
The splitting of water in the presence of ordinary and nano TiO2 was carried out using hydrocarbon as a dual agent and solar energy as a light source for these experiments. The hydrogen gas evolved was tested and measured using downward displacement of water. The observed results show that more hydrogen was evolved wh…
The present paper reviews the recent efforts and achievements regarding the fabrication techniques of self‐assembled quantum dot pairs. Quantum dot pairs, the simplest but most‐investigated quantum dot molecules, have attracted significant attention due to their potential applications in quantum information technologi…
The quinhydrone/methanol treatment has been reported to yield outstanding passivation of the H-terminated Si(100) surface. Here, we report on the mechanism of this process by comparing the resulting surface to that of freshly etched H-terminated Si, of Si with chemically grown oxide, and of Si treated with hydroquinon…
We report the first measurements of the X-ray induced decomposition of KClO3 as a function of energy in two experiments. KClO3 was pressurized to 3.5 GPa and irradiated with monochromatic synchrotron X-rays ranging in energy from 15 to 35 keV in 5 keV increments. A systematic increase in the decomposition rate as the…
Anomalous pressure dependent conductivity is revealed for heteroacene organic field-effect transistors of dinaphtho[2, 3-b:2', 3'-f]thieno[3, 2-b]thiophene single crystals in the direction of a and b crystallographic axes. In contrast to the normal characteristics of a monotonic increase in mobility μ with the applica…
This study describes a facile breath-figure method for the preparation of honeycomb-like porous TiO2 films with an organometallic small-molecule precursor. Multiple characterization techniques have been used to investigate the porous films and a mechanism for the formation process of porous TiO2 films through the brea…
Binary nanowires (Co${}_{50}$Fe${}_{50}$/Ni${}_{80}$Fe${}_{20}$) that are 260-nm wide, 25-nm thick, and 4-mm long are fabricated using ``self-aligned shadow deposition'' lithography. Each wire is separated from the next by a gap of 115 nm. Ferromagnetic resonance experiments performed on the nanowires indicate resonan…