High-temperature surface-enhanced Raman scattering (SERS) sensing is significant for practical detections, and pinhole-containing (PC) metal@oxide structures possessing both enhanced thermal stability and superior SERS sensitivity are served as promising SERS sensors at extreme sensing conditions. Through tuning the Al2O3 precursors' exposure time during atomic layer deposition (ALD), Al2O3 she...

The addition of small amounts (2-10 wt %) of SiO2 to γ-Al2O3 increases the temperature of heat treatment necessary for transformation to R-Al2O3 by ∼100 K. We have studied this system using high-temperature solution calorimetry in molten 2PbO‚B2O3 at 1043 K. Our results indicate that the spinel-type Al2O3-SiO2 solid solutions with 2-10 wt % SiO2 are always energetically metastable by 30-35 kJ‚m...

Cu–Zn/γ–Al2O3 catalysts were prepared by the impregnation method. Catalytic activity was evaluated for N2O decomposition in a fixed bed reactor. The fresh and used catalysts were characterized by several techniques such as BET surface area, X-ray diffraction (XRD), and scanning electron microscopy (SEM). The Cu–Zn/γ–Al2O3 catalysts exhibit high activity and stability for N2O decomposition in mi...

We performed a quantum mechanical study of segregation Cu atoms toward antiphase boundaries (APBs) in Fe3Al. The computed concentration was 3.125 at %. APBs have been characterized by shift the lattice along ?001? crystallographic direction. APB energy turns out to be lower for located directly interfaces and we found that it is equal 84 mJ/m2. Both (as point defects) extended their specific im...

The present study was designed to evaluate the hepatotoxicity of aluminium oxide (Al2O3). To achieve this objective, Al2O3 of three different sizes (30nm, 40nm and bulk) was orally administered for 28 days to 9 groups of 10 Wistar rats each, at the dose of 500, 1000 and 2000 mg/Kg/rat. A tenth group of 10 rats received distilled water and served as control. After 28 days of exposure, the animal...

In this paper, polyethyleneterephthalate (PET) films with and without plasma pretreatment were modified by atomic layer deposition (ALD) and plasma-assisted atomic layer deposition (PA-ALD). It demonstrates that the Al2O3 films are successfully deposited onto the surface of PET films. The cracks formed on the deposited Al2O3 films in the ALD, plasma pretreated ALD, and PA-ALD were attributed to...

An investigation into the structure and chemical stability of green light emitting aluminum complexes of 8-hydroxyquinoline (Alqx)/Al2O3 colloids was performed. (Alqx)/Al2O3 ethanol colloid was characterized by the high resolution transmission electron microscopy (HRTEM), Fourier transform infrared spectroscopy, thermogravimetric and simultaneous differential thermal analysis, and thermogravime...

The bias stability of zinc-tin-oxide ZTO thin-film transistors TFTs with either Al2O3 gate dielectrics deposited via atomic layer deposition ALD or SiO2 gate dielectrics deposited via plasma-enhanced chemical vapor deposition PECVD was compared. Both device types showed incremental mobility 11 cm2 /V s, subthreshold slopes 0.4 V /dec, and ION / IOFF ratios of 107. During repeated ID-VGS sweepin...

Based on Density Functional Theory – Generalized Gradient Approximation calculations (DFT-GGA), we provide a theoretical model for the H2 combustion on Al2O3 supported catalytically active Pt nanoclusters. In a previous paper (Synowczynski, 2008), we identified several adsorption and dissociation processes that occur on the Al2O3 support and demonstrated that products from these reactions can m...

The densification behavior and mechanical properties of B4C hot-pressed at 2000°C for 1 h with additions of Al2O3 up to 10 vol% were investigated. Sinterability was greatly improved by the addition of a small amount of Al2O3. The improvement was attributed to the enhanced mobility of elements through the Al2O3 near the melting temperature or a reaction product formed at the grain boundaries. As...