Materials Literature
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Vanadium oxide nanostructures were synthesized using NTP as a carrier through soft-chemical method. The influence of calcination temperature on the phase and morphology of obtained pristine product were characterized using X-ray diffraction (XRD), thermal gravimetric analysis (TGA) and scanning electron microscopy (SE…
Perovskite-type sodium niobate, NaNbO3 was prepared by hydrothermal reaction using an amorphous hydrated niobium oxide (a-Nb2O5). A single phase of perovskite-type NaNbO3 was obtained under the condition of 160°C and 1.0 M NaOH solution, and at higher temperature (≥180°C) cubic shape particles with the size of 5–10 µm…
Silver nanoparticles were spontaneously formed on pristine and oxidized single-wall nanotubes. Nanoparticles were observed on carbon nanotubes with AFM, and the presence of Ag nanoparticles were confirmed by ESR experiments. Raman spectroscopy of the Ag-treated carbon nanotubes had a 4–10X enhancement of intensity com…
Broadband inelastic light scattering spectra of (1-x)(Na0.5Bi0.5)TiO3-xBaTiO3 single crystals are measured in the frequency range between 1 GHz and 20 THz to investigate the peculiar behavior of the polarization and the origin of diffusive dielectric anomaly. In the light scattering spectrum in the 1GHz–10 THz range,…
Automotive aluminum alloy sheet metal needs to improve the formability and the strength. In this study, the asymmetric rolling process was applied to the aluminum alloy sheet metal generation, because the {111}//ND texture, which corresponds to a part of the shear deformation texture, acts the high-formability. There…
AIM: To investigate colorectal uptake of solid lipid nanoparticles (SLNs) in mice receiving different doses of 1,2-dimethylhydrazine (DMH) using magnetic resonance (MR) and laser-scanning confocal fluorescence microscope (LSCFM) imaging. METHODS: Eight mice were sacrificed in a pilot study to establish the experimenta…
In this paper we present a micromagnetic analysis and development of low-field magnetic sensors based on the planar Hall effect (PHE) in Permalloy (Ni 80 Fe 20 ) thin films and spin-valve structures. We used these sensors for field measurements, biomolecules detection in lab-on-a-chip applications and angle positionin…
A simple and inexpensive system comprised of H(2)O(2)-pyridine-FeCl(3)·6H(2)O for the catalysis of olefin epoxidation was established. Intriguingly, the reactivity of this system greatly depends on the amounts of pyridine. Various substrates, including aromatic and aliphatic olefins, were epoxidized by this simple sys…
A poly(methyl methacrylate) (PMMA) composite film containing 4 wt% of the strongly second order NLO active ionic material [(E)-N,N-dimethylamino-N′-methylstilbazonium][Cu5I6] (1), obtained by spin coating of a CH3CN solution on a glass substrate, shows by a two step process (electric poling followed by controlled ther…
本研究では，塩化揮発法によるNd–Fe–B磁石からの希土類元素の選択的分離回収プロセスの開発のための基礎的なデータを取得することを目的として，塩素気流中，昇温速度30℃/min，最高到達温度100–1000℃の加熱条件下でのNd–Fe–B磁石中のNd，Prならびに共存元素の塩化揮発挙動を詳細に追跡した．Nd–Fe–B磁石を塩素気流中で加熱すると磁石中のFeとBが低温部で揮発することから，固相中にNdおよびPrを濃縮させることができた．Nd–Fe–B磁石の微粉末は活性が高いために，大気中にて容易に酸化することから，大気雰囲気中500℃で加熱処理し，酸化Nd–Fe–B磁石粉末を調製した．この酸化試料を塩素気流中で加熱したところ，Feと…
ABSTRACT Key Words: DSC Analysis of Thermosetting Polyimides Based onThree Bismaleimide Resin Eutectic Mixtures Afsoon Fallahi 1 , Laleh Rajabi 2* , and Faramarz Afshar Taromi 1 (1) Department of Polymer Engineering and Color Technology, Amirkabir Universityof Technology, P.O. Box: 15875/4413, Tehran-15916/34311, Iran…
Currently, boron trifluoride, BF3, is the primary feed gas for boron implantation in manufacturing of semiconductor devices. However, BF3 molecule is difficult to ionize and fragment, and therefore only a small fraction is is converted into B+ ions that can be used for ion implantation. This results in low B+ beam cur…
Eu 2+ -doped oxyapatite Sr x La 10−x (SiO 4 ) 6 O 3−x/2 phosphors are prepared by solid-state reaction at high temperatures under reducing atmosphere. Their crystal structures and photoluminescence are investigated by x-ray diffraction (XRD) and fluorescence spectroscopy, respectively. The XRD results indicate that th…
A series of poly(urea-formaldehyde) (PUF) microcapsules filled with dicyclopentadiene (DCPD) was successfully prepared by in situ polymerization. The effect of diverse process parameters and ingredients on the morphology of the microcapsules was observed by SEM, optical microscopy (OM) and digital microscopy. Differen…
A first-principles plane-wave pseudopotential method based on the density functional theory was used to investigate the dehydrogenation properties and its influence mechanics on several high-density hydrogen storage materials (MgH2, LiBH4,LiNH2 and NaAlH4) and their alloys. The results show that MgH2, LiBH4, LiNH2 and…
Germanium-antimony-telluride or, particularly, (GST) thin films were deposited by hot wire (HW) chemical vapor deposition (CVD). Tetraallylgermanium, triisopropylantimony, and diisopropyltelluride were used as precursors for germanium, antimony, and tellurium, respectively. The influence of deposition parameters, such…
The epitaxial graphene (EG) layers are grown on Si-terminated 6H-SiC (0001) substrates and C-terminated 6H-SiC (000 1 - ) substrates separately by thermal annealing in an ultrahigh vacuum chamber. Low energy electron diffraction(LEED) and synchrotron radiation photoelectron spectroscopy(SRPES) are used to in-situ stud…
Publisher Summary Expansion of nuclear energy worldwide is necessary to meet increased power demands and greenhouse gas reduction targets. Virtually any international energy forecast predicts large growth in nuclear power generation over the next 30–50 years. The expansion of commercial nuclear power production is lik…
Microstructural evolution accompanying mechanical properties change by aging treatment at 723 K in cold-swaged Ti-29Nb-13Ta-4.6Zr were investigated in order to obtain an optimized aging condition for getting excellent mechanical properties. The precipitate free zone exists in Ti-29Nb-13Ta-4.6Zr after aging treatment f…
As hemp is a renewable resource with the high biomass yield it could be considered as potential abundant local biomass material for a wide range of applications. In this article hemp fibres architecture as a source of high strength cellulose are analysed. In experimental part steam explosion technology is applied to d…