Materials Literature
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The kinetics of the explosive decomposition of pressed pentaerythritol tetranitrate pellets containing nickel nanoparticles with various radii has been investigated experimentally, with the explosion initiated by a neodymium laser pulse (wavelength, 1064 nm; pulse duration at half-height, 14 ns), and probability curve…
Palladium nanoparticle aggregates (Pd-NPAs) with various sizes were prepared by regulating the stability of Pd colloids. Structures of Pd-NPAs and their performances for electrooxidation of ethanol were investigated using power X-ray diffraction, transmission electron microscopy and electrochemical measurements. Exper…
Nuclear level density is a fission characteristics for each core. Level density parameter ratio a f /an plays an important role in the statistical calculations of the fission, investigation of heavy ion collisions and calculation of the reaction cross sections. In this study, the effects of the different level density…
Radiation tolerance of a field emitter array and a cadmium telluride-based photoconductor was investigated. The variation of the performance of these devices were investigated during the γ-ray irradiation by every 100-200 kGy. Total dose of irradiation reached 1.2 MGy, but no significant deterioration of the propertie…
A unique cold moderator based on a mixture of mesitylene and m-xylene is developed for the IBR-2 pulsed reactor. If combined with a standard warm-water moderator, it provides a high neutron flux in a wide wavelength range. The advantages of the use of this composite moderator in neutron-diffraction texture analysis ar…
The interest in the development of new nanodielectric fluids suitable for electrotechnical applications has increased significantly in the last decade. Several authors have reported experiences on fluids manufactured using different base fluids and nanoparticles. Most of these studies are focused on the comparison of…
Current passage in the ESR process is accomplished by at least two Faradaic reaction systems, one at the electrode/slag interface and another at the slag/ingot interface. The nature of these reactions has been investigated and is reported to be a function of the alloy composition, current density and slag composition.…
We have implemented experimental methods for determining emission area parameters by using online processing of current-voltage characteristics (IVC). We calculated the formal emission area for each experimental IVC: for a single tungsten emitter and for several multi-tip emitters based on CNT and graphene. Voltage de…
Ion-containing polymers are of significant interest for numerous applications, including, but not limited to, ion-exchange resins for water purification, membranes for gas mixture separation, electrolytes in batteries and fuel cells, food packaging, and high performance materials. The introduction of conventional ions…
We combine strategies for passive particle assembly in soft matter with robotics to develop new means of controlled interaction. In capillary assembly, particles distort fluid interfaces and move in directions that minimize the surface area. In particular, they move along principle axes on curved interfaces to sites o…
The paper deals with the investigation of the orientation motion of relativistic electrons in charged (111) planes and charged [110] axes of lithium halides ionic crystals of LiF, LiCl, LiBr and LiI. On the basis of these investigations the spectra of quasicharacteristic radiation for the electron beams with various L…
Reduction of tetrachloroaurate( iii ) ions in solutions of native DNA results in a formation of either small gold nanoparticles or continuous nanowires decorating DNA macromolecular template.
실온에서 인코넬 718의 UNSM(Ultrasonic nanocrystal surface modification)처리재, 수소취화재(100 bar, 300 ℃에서 120 h) 및 수소취화재의 UNSM처리재의 회전굽힘피로시험에 의해 얻어진 결과, 수소취화재는 미처리재의 S-N곡선보다 피로수명이 약 10~20 % 감소하며 부식피로나 비철재료처럼 피로한도 없이 점진적으로 감소하였다. 표면균열수는 수소취화의 영향으로 평균입경(13 μm)보다 작은 균열의 비율이 약 80 %를 차지하였다. 결정입계, 표면 흠 등에 수소침투에 의한 취화현상으로 티어링(tearing)하면서 복수…
In this study, antistatic properties of nylon 6,6 and polyester fabrics were improved. Diallyldimethylammonium chloride (DADMAC) monomer was used as an antistatic agent together with di(ethylene glycol) diacrylate crosslinker. Non-thermal, high density atmospheric pressure plasma was used to graft and polymerize the m…
The objective of this research is to focus improving the properties of machinable mica-based glass-ceramics in order for restorative dental materials. The glass-ceramics derived from the SiO2- Al2O3-MgO-MgF2-SrCO3-CaCO3-CaF2-P2O5 system were produced by a two-stage heat treatment. It was elucidated that the optimum nu…
A radio-photoluminescence (RPL) dosimeter with a copper-ion luminescent center was fabricated to evaluate its response in ionized particle detection. A focused proton microbeam with varying energies up to 3 MeV and heavy ions of 490 MeV osmium (Os) were employed along with X-rays to evaluate its performance in microme…
When a film of soft matter solutions is being dried, a skin layer often forms at its surface, which is a gel-like elastic phase made of concentrated soft matter solutions. We study the dynamics of this process by using the solute based Lagrangian scheme which was proposed by us recently. In this scheme, the process of…
Hydrothermal reaction of cadmium chloride and 2-carboxyethyl(phenyl)phosphinic acid (H2L) under pH 2.69 or 5.00 afforded two novel Cd(II) compounds with the formula of [Cd(HL)2] n (I) and [Cd3(L)2(OH)2] n (II), respectively. Both compounds were well characterized by elemental analysis, IR spectroscopy, power X-ray dif…
Powder samples of (Ca,Sr)TiO3:Er were prepared by a solid-state reaction method. Photoluminescence due to f-f transitions of Er3+ was not induced by band-gap excitation of (Ca,Sr)TiO3 but by f-f transitions of Er3+. An electroluminescent device in which thin films of Ca0.6Sr0.4TiO3:Er and SnO2:Sb are stacked alternate…
In this paper, the authors demonstrate that Auger electron spectroscopy (AES) is an effective characterization tool in the analysis of the cleaning of semiconductor surfaces under different atmospheres. AES has several advantages for this purpose: it is nondestructive, surface specific {the analysis depth is only 4–50…