Materials Literature
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We report a novel approach to obtaining a classical blue-green excitable CaS:Eu 2+ phosphor with desired red emission by microwave (MW) firing procedure in the absence of adding elemental sulphur. The disturbing effect of MW electromagnetic field on decomposition of CaSO4 into CaS activated by europium is distinctly o…
Among the Ruddlesden-Popper series, La4Ni3O10 has received widespread attention as a promising cathode material by reason of its favorable properties for realizing high performance of intermediate temperature solid oxide fuel cells (IT-SOFCs). The La4Ni3O10 cathode is prepared using the facile sol-gel method by employ…
Journal of the Korean Society of Marine Engineering, Vol. 38, No. 6 pp. 698~703, 2014 ISSN 2234-7925 Printhttp://dx.doi.org/10.5916/jkosme.2014.38.6.698 ISSN 2234-8352 Online †Corresponding Author: Division of Marine Engineering, Korea Maritime and Ocean University, 727 Taejong-ro, Yeongdo-Gu, Busan, 606-791, Korea, E…
The analysis of electric field distribution in electrospinning machine is critical to the nanofiber preparation.In this paper, electric field strength is calculated based on finite element calculation theory of electric field.Electric field structure of plate-plate type electrospinning machine is simulated using ANSYS…
Mg-doped Sb3Te films are proposed to improve the performance of phase-change memory (PCM). We prepare Mg-doped Sb3Te films and investigate their crystallization behaviors, structural, optical and electrical properties. We find that Mg-doping can increase the crystallization temperature, enhance the activation energy,…
An in situ measurement setup is established to investigate the photoinduced degradation effects in a controllable inert gas ambient environment for the two different microstructures of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyricacid methyl ester (PCBM) bulk-heterojunction organic solar cells. The two de…
In this work, hydrogen absorption and the permeation behavior of the passive layer formed on zircaloy-4 are investigated. Potentiodynamic polarization, Mott—Schottky analysis, electrochemical impedance spectroscopy, and Raman scattering spectroscopy are employed to characterize the passive defects before and after hyd…
In the article enterprise acting in the business of processing plastics was researched. In the enterprise is realizes mainly mass production. The main factor that decides about the reliability of applied technologies there are used machines. As a result of analysis a modernity level of sub-assemblies for two machines…
Defects in silicon carbide (SiC) substrate are crucial to the properties of the epitaxial graphene (EG) grown on it. Here we report the effect of defects in SiC on the crystalline quality of EGs through comparative studies of the characteristics of the EGs grown on SiC (0001) substrates with different defect densities…
Exceptional progress has been made with chemical vapor deposition (CVD) of graphene in the past few years. Not only has good monolayer growth of graphene been achieved, but large-area synthesis of graphene sheets has been successful too. However, the polycrystalline nature of CVD graphene is hampering further progress…
In the present paper, the concentration effect of near-infrared quantum cutting of Tm 3+ ion in (Y 1– x Tm x ) 3 Al 5 O 12 powder phosphor is studied by means of experiments and calculations. In addition, the absorption spectra, visible-to-near-infrared excitation and emission spectra, and fluorescence lifetimes are m…
The extraordinary optical transmission (EOT) phenomenon of nano-periodic aperture array in metallic film has been widely investigated and used in biosensors. The surface plasmon resonance and cavity mode in some periodic nanostructures, such as nanohole and nanoslit, cause EOTs at certain wavelengths. This resonance w…
Zinc oxide (ZnO) nanocrystals containing Fe2O3have been synthesized by the calcination method. Ferromagnetic resonance (FMR) and dc magnetization measurements of 0.40(Fe2O3)/0.60(ZnO) nanocomposite have been carried out in the 4-300 K range to study the magnetic properties of agglomerated magnetic zinc ferrite ZnFe2O4…
We theoretically investigate the coexistence of antiferromagnetism and superconductivity in the iron-based superconductors by using the mean-field theory for two- and three-orbital models. We find that both the s_{+-}-wave and s_{++}-wave superconductivity can coexist with antiferromagnetism in the two models. On Dira…
A method is introduced to isolate and measure the electrical transport properties of individual single-walled carbon nanotubes (SWNTs) aligned on an ST-cut quartz, from room temperature down to 2 K. The diameter and chirality of the measured SWNTs are accurately defined from Raman spectroscopy and atomic force microsc…
In the last years, production of particleboards with good overall performance and very low formaldehyde emission has been a challenge to wood based panels (WBP) industry, mainly since the re-classification of formaldehyde by the IARC (International Agency for Research on Cancer) as ‘carcinogenic to humans (Group 1)’.…
Thermoelectric oxide nanofibers prepared by electrospinning are expected to have reduced thermal conductivity when compared to bulk samples. Measurements of nanofibers’ thermal conductivity is challenging since it involves sophisticated sample preparation methods. In this work, we present a novel method suitable for m…
Abstract We have developed a new cooling material that uses vaporization heat. This system consists of poly(N-isopropylacrylamide) [P(NIPAAm)] and C2H4-permeated mesoporous silica [MCM(C2H4)]. Although the polymer can dissolve in water below ca. 32 °C (above this temperature, it is insoluble in water), 1H nuclear magn…
A polyaniline–poly(3-methylthiophene)–poly(3,3′-diaminobenzidine) film was deposited on a platinum disc electrode in dichloromethane containing tetrabuthylammonium perchlorate supporting electrolyte and used for the amperometric determination of dopamine. At a pH of 2.0, this electrode allowed successful determination…
In this paper, the analytical solution of metallic spheres which takes the frequency dispersion characteristic into account is studied at terahertz frequencies. In order to characterizing metals at terahertz frequencies, the classical relaxation effect frequency dispersion model is used and a calculated analytical sol…