Materials Literature
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The Raman spectra of evaporated amorphous selenium films, of films of undoped Se 95 Te 5 chalcogenide vitreous semiconductor, and of similar films doped with Sm are studied. It is shown that the Raman spectra of amorphous selenium consist of two bands with peaks at 40.5 and 254 cm −1 and the spectra of other samples c…
The C 18 H 20 N 2 O 7 U · 2H 2 O ( I ) complex has been prepared and characterized by single crystal X-ray diffraction properties (CIF file CCDC no. 913243). The title compound crystallizes in the orthorhombic system, space group Pbca with a = 19.542(5), b = 9.916(5), c = 21.940(5) Å, V = 4252(3) Å 3 and Z = 8. In com…
The interaction between argon ions and a natural oxide layer of polycrystalline aluminum is studied via Auger electron (AE) and electron energy loss (EEL) spectroscopy. It is found that bombardment with argon ions whose energy is lower than the Al2O3 sputtering threshold results in the accumulation of bombarding ions…
It is shown that ion-beam treatment during the deposition of ITO films by reactive radio-frequency magnetron sputtering induces a decrease in the resistivity of the films even at room temperature. Variations in the Hall mobility and concentration of charge carriers are studied in relation to the condensation temperatu…
We investigated the structural, electrical and optical characteristics of IGZO thin films deposited by a room-temperature RF reactive magnetron sputtering. The thin films deposited were annealed for 2 hours at various temperatures of 300, 400, 500 and $600^{\circ}C$ and analyzed by using X-ray diffractometer, transmis…
The crystal solvates in C60-CCl4 and C70-CCl4 systems obtained by crystallization from CCl4 solution at room temperature were studied by IR Fourier spectroscopy and X-ray diffraction. The C70 · (CCl4) n crystal solvate was obtained and studied for the first time; its hexagonal crystal lattice has unit cell parameters…
In this paper, the aircraft impact force models of large commercial B747 aircraft were developed by using so called Missile-Target Interaction Method. The Lagrangian meshfree SPH concept was adopted to the fuel mass for impact force calculation. 240ton, 320ton, 420ton of aircraft mass were considered to meet with the…
In this paper, we fabricated a hydrogenated amorphous silicon-germanium ( a - SiGe : H ) thin film solar cell with gradually increasing GeH 4 flow rate in order to absorb long wavelength of solar spectrum without stacked structures such as tandem or triple junctions. The thin film solar cell with the a - SiGe : H in i…
Abstract The surface of Tb 0.3 Dy 0.7 Fe 2 alloys was modified by microwave electron‐cyclotron‐resonance chemical vapor deposition (MW‐ECR‐CVD) and ion implantation technology, respectively. The microstructure and corrosion resistance of nitrided layers were investigated by means of optical microscope (OM), X‐ray diff…
The IEC standard for onshore or offshore wind turbines requires additional dummy simulations (at least 5 s) for the transient responses due to initial conditions. An increase in the dummy time causes a considerable increase in the computational cost considering multiple design spirals with several thousand design load…
The purpose of this study was to evaluate the dispersion degree of particles using a nanoindentation test for titanium oxide nanoparticles/epoxy resin nanocomposites. Thus, the effects of the particle size and weight fraction, dispersion agent, and position of the sample on the modulus and degree of particle dispersio…
Hormones and their derivatives are widely used to treat different types of diseases such as prostate cancer which is treated by agonists of gonadotropin‑releasing hormone. Triptoreline salts are the first therapeutics of this group launched into the market in the form of microparticles (microspheres). Implants, as one…
Nanoemulsions have gained great accolade in pharmaceutical and food industries, because of integer features, such as optical clarity, ease of preparation, thermodynamic stability, and increased surface area. They are isotropic, nonequilibrium, kinetically stable system of oil, defined blend of surfactant and co-surfac…
2010년 기준 전 세계 자동차 등록대수는 약 10억 대에 이르며, 약 4천만 대의 폐 자동차가 발생하였다. 이에 EU를 비롯한 선진국들은 2015년까지 폐 자동차의 재활용률을 95%까지 높일 것을 요구하고 있다. 우리나라도 '전기 전자제품 및 자동차의 자원순환에 관한 법률'을 제정하여 폐 자동차의 95% 재활용을 목표로 하고 있다. 이러한 요구조건을 충족시키기 위해 현재 충분히 재활용되지 못하고 파쇄잔재물의 형태로 매립되고 있는 플라스틱, 비철금속 등의 처리 문제가 중요한 과제로 부상하고 있다. 본 연구에서는 폐 자동차 처리 선진국의 재활용 현황 조사의 일환으로,…
Thermal shock or overheating of WGS catalyst for SEWGS system during hydrogen pre-treatment can cause reactivity decay of the catalyst. To select appropriate pre-treatment condition, temperature profiles of catalyst bed (or outside fluidized particle bed of bed insert) during pre-treatment were measured and then CO co…
We investigated emission characteristics of tandem organic light emitting devices (OLEDs) with p-type materials as charge generation layer. The tandem OLEDs were fabricated by using $MoO_x$ , $WO_x$ , C60 and HATCN as p-type material or not using p-type material for charge generation. When HATCN was used as p-type mat…
$LaCoO_3$ powders synthesized by Pechini process were pulverized by planetary ball-milling to decrease particle size and characterized as a catalyst in alkaline solution for oxygen reduction and evolution reaction (ORR & OER). The changes of physical properties, such as particle size distribution, surface area and ele…
The conditions (oxygen partial pressure and growth rate) for the deposition of magnetite (iron oxide) Fe 3 O 4 on the r plane of the single-crystalline sapphire using the high-frequency reactive diode sputtering of the Fe target are determined. The resulting ferromagnetic layers exhibit polycrystalline structure with…
In this research, we investigate electrical performance and electrochemical properties of graphene supported Pt (Pt/G) and PtM (M = Ni and Y) alloy catalysts (PtM/Gs) that are synthesized by modified polyol method. With the PtM/Gs that are adopted for oxygen reduction reaction (ORR) as cathode of proton exchange membr…
Two title rare earth metal coordination compounds, (MnH)[GdIII(Edta)(H2O)3] · 4H2O (I) and (MnH)2[Gd 2 III (H2Ttha)2] · 4H2O (II), where Mn = methylamine, H4Edta = ethylenediamine-N,N,N′,N′-tetraacetic acid, H6Ttha = triethylenetetramine-N,N,N′,N″,N′″,N′″-hexaacetic acid), have been successfully synthesized through di…