Materials Literature
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Abstract We present studies of the temperature dependence of AC susceptibility, χ, and magnetization, M in few Fe‐Cr based microwires. We observed drastic increasing of the χ in vicinity of Curie temperature which we interpreted as the Hopkinson effect. Cr content drastically affects the Curie temperature of studied m…
Abstract In this study, 0 – 15 wt.% Co3O4 powders were added to 8 mol.% yttria-stabilized cubic zirconia (8YSZ) powders in order to determine the effect of Co3O4 addition and amount on the microstructure, sintering, and electrical properties of yttria-stabilized cubic zirconia. Colloidal processing was used to ensure…
Cu–4.2 at. % Ti alloy sheets with the dimension of 10 × 10 × 0.15 mm 3 were irradiated with 2 MeV electrons at 200 and 250 °C, and the Vickers hardness was measured as a function of electron fluence. The hardness increased by the electron irradiation. The increase in hardness depends on the electron fluence and irradi…
We report results of measurements on the evolution of the surface morphology of a hot tungsten surface due to impacting low-energy (80 – 12,000 eV) He ions, performed at the ORNL Multicharged Ion Research Facility (MIRF). Surface-morphology changes were investigated over a broad range of fluences, energies and tempera…
Abstract An oxygen‐stoichiometric, B‐site‐ordered perovskite Ca2Fe1.1Mn0.9O6 (CFMO) with alternate stacking of Fe and Mn layers was obtained through topochemical oxidation of the corresponding brownmillerite phase under high pressure in the presence of KClO4. The structure crystallizes in the P21/m space group with a…
This paper reports a synthesis of zinc oxide (ZnO) nanosheets by hydrothermal method. ZnO nanosheets on Al substrate were generated by hydrothermal synthesis with zinc nitrate hexahydrate (Zn(NO 3 ) 2 ·6H 2 O) and hexamethylenetetramine (HMT) as a research system, which were controlled conditions of the reaction. The…
Nanoscience has become a topic covered in undergraduate education. The new properties gained as matter becomes nanoscale are especially useful to illustrate the impact of size. Silver is a good example for such an illustration because it displays completely different properties at different sizes, such as bulk silver,…
Abstract The reactions of LnCl3 (Ln = Nd, Pr, La) with NaBH4 in a THF solution at 75 °C afforded ion‐pair lanthanide borohydrides [Ln(BH4)2(THF)5]+[Ln(BH4)4(THF)2]– [Ln = Nd (1), Pr (2), La (3)] in high yields whilst similar reactions at 40 °C yielded the neutral borohydrides [Ln(BH4)3(THF)3] [Ln = Nd (4), Pr (5), La…
Seyed Ali Johari, Mohammad Reza Kalbassi, Il Je Yu Fisheries Department, Natural Resources Faculty, University of Kurdistan, Sanandaj, Iran Department of Aquaculture, Marine Science Faculty, Tarbiat Modares University, Mazandaran, Noor, Iran Institute of Nanoproduct Safety Research, Hoseo University, 165 Sechul-ri, Ba…
The effects of high energy Kr 26+ ions irradiation on metallic glass FeSiNbZrB ribbons are reported. Before and after irradiation, neither metallic glass systems show long-range order in atomic arrangement, but both exhibit only a short-range order. And under irradiation, there was little decrease in reflectivity of t…
A new hemispherical deflector analyzer (HDA) which is designed for electron energy analysis in atomic collisions has been constructed and tested. Using the crossed beam technique at the electron spectrometer, test measurements were performed for electron beam (200 eV) – Helium atoms interactions. These first experimen…
Abstract Amorphous LaAlO3 thin films were deposited on bare Si substrates using RF-magnetron sputtering at room temperature. A post-annealing process was performed in O2 atmosphere at 650 °C for 30 min. The annealed films have a high-quality amorphous structure with faceted surface and uniform thickness. Smaller rough…
환경오염, 기후변화, 고갈되어가는 화석원료에 대한 문제를 해결하기 위해 재생가능한 자원으로부터 케미칼 및 고분자 등의 산업자원을 생산하는 친환경 공정개발에 많은 연구가 진행되고 있다. 최근에 재생가능한 바이오매스로부터 다양한 케미칼 및 고분자 등을 생산하는 바이오리파이너리 공정이 많은 관심을 받고 있으며, 석유화학기반산업을 보완 혹은 대체할 가능성이 매우 높은 친환경공정으로 생각되고 있다. 본 총설에서는 바이오리파이너리 공정에 핵심적인 촉매로 사용되고 있는 재조합 미생물의 개발의 최근 동향을 바이오나일론, 바이오폴리에스터의 생산을 위하여 개발되고 있는 재조합 미생물…
Abstract We studied giant magneto‐impedance (GMI) effect, magnetic and structural properties of thin Finemet‐type (FeCuNbSiB) glass‐coated microwires fabricated by Taylor‐Ulitovsky technique with different composition and diameters, with the aim to achieve the optimal conditions for improving the final GMI response. W…
By using a quasielastic neutron scattering technique (disk-chopper-type spectrometer AMATERAS at J-PARC), we have investigated the microscopic dynamics of polybutadiene (PB) in which silica particles were embedded. The experimental results gave us both a damped vibration mode of PB and jumped diffusion motion of the s…
Quantum spins in one-dimensional (1D) chains exhibit characteristic features such as the Haldane gap ( S =1) and the spin-Peierls state ( S =1/2). Recently multi degrees of freedom in cooperation with quantum spins are focused. We present here spin dynamics in the lightly hole doped Nd 2- x Ca x BaNiO 5 ( x =0.035), 1…
The technical challenges of managing the health of critical infrastructure systems necessitate greater structural sensing capabilities. Among these needs is the ability for quantitative, spatial damage detection on critical structural components. Advances in material science have now opened the door for novel and cost…
We studied the relation between structure of the Ag clusters produced in Ag-type zeolite-A and properties of photo luminescence (PL) by use of in-situ X-ray absorption fine structure (XAFS). Ag clusters are generated in the cavity of Ag-type zeolite-A which is cooled to room temperature after heated at 500°C for 24 ho…
We report the in situ electric properties of lead phthalocyanine two-terminal devices. The application of a strong bias voltage induced current rectification and shifted the activation energy of conduction ±0.1 eV from the equilibrium value. The rectification and activation energy splitting could be removed by anneali…
Recently, liquid crystal (LC) polarization gratings (PGs), because of several advantages, have become extremely popular although the process for analysis and optimization of different optical characteristics is still very complicated. Here, we reveal a simplified model (SM) to evaluate and optimize the performance of…