EXAFS Debye-Waller factors of B2-FeAl alloysThis work develops the anharmonic correlated Debye model to study the temperaturedependent extended X-ray absorption fine structure (EXAFS) Debye-Waller factors (DWFs) of B2- FeAl alloys. We derived the analytical expressions of the EXAFS DWF and Debye frequency as functions of temperature. Numerical calculations were performed for Fe1-yAly alloy...
6 trang | Chia sẻ: thuyduongbt11 | Ngày: 16/06/2022 | Lượt xem: 175 | Lượt tải: 0
Excess conductivity analyses in Bi-Pb-Sr-Ca-Cu-O systems sintered at different temperaturesThis paper studies the effects of the sintering temperature on crystal structure, critical temperature (Tc) and excess conductivity of Bi-Pb-Sr-Ca-Cu-O (BPSCCO) system. Bulk BPSCCO samples were fabricated by the solid-state reaction method. Four different temperatures of 835 °C, 840 °C, 845 °C, and 850 °C were applied to sinter four different sa...
10 trang | Chia sẻ: thuyduongbt11 | Ngày: 16/06/2022 | Lượt xem: 263 | Lượt tải: 0
Influences of ZnO nanorod arrays on photocatalytic activity of n-ZnO Nanorods/p-Si heterostructureZinc oxide is known as an excellent material for biosensors, solar cells, semiconductors and photocatalysts. In this work, n-ZnO nanorods/p-Si heterostructures were successfully fabricated by a hydrothermal method at different baking temperatures. The n-ZnO nanorods/p-Si heterostructures show good photocatalytic ability at high baking temperatur...
6 trang | Chia sẻ: thuyduongbt11 | Ngày: 16/06/2022 | Lượt xem: 217 | Lượt tải: 0
Electrochromic properties of PANI/TiO₂ nanocomposite films prepared by electropolymerizationPANI/nc-TiO2/ITO composite films were prepared by electrochemical method where the monomer aniline was polymerized onto nano-porous TiO2/ITO films (PANI/nc-TiO2/ITO). The PANI/nc-TiO2 heterojunctions were formed in the composite films due to the insertion of PANI in nano-porous TiO2 particles. PANI/ITO films exhibited a reversible electrochromic...
7 trang | Chia sẻ: thuyduongbt11 | Ngày: 16/06/2022 | Lượt xem: 182 | Lượt tải: 0
Photoluminescent properties of red-emitting AlPO4:Cr3+ phosphor for plant growth LEDsIn this study, red-emitting AlPO4:Cr3+ phosphors have been successfully synthesized by a facile sol-gel method. The Tanabe–Sugano diagram demonstrates that the surrounding sites of Cr3+ ions have a high crystal field with Dq/B=2.47. The sharp 694-nm peak on the PL of AlPO4:Cr3+ phosphor could be attributed to the 2E→4A2 electron transition of Cr...
10 trang | Chia sẻ: thuyduongbt11 | Ngày: 16/06/2022 | Lượt xem: 242 | Lượt tải: 0
Facile hydrothermal method for fabrication of seedless ZnO composite on PCBHerein we report on a simple method to grow ZnO nanorod/Graphene oxide (GO) array without the initial seed layer on a printed circuit board (PCB) as the substrate based on Galvanic effect. The hydrothermal growing conditions such as temperature and time were investigated by Xray diffractometry (XRD), Raman scattering, as well as Scanning Electron...
10 trang | Chia sẻ: thuyduongbt11 | Ngày: 16/06/2022 | Lượt xem: 171 | Lượt tải: 0
Fabricating microsphere lasers by protein dehydration: A fast fabrication method and excellent lasing propertiesMicrosphere biolasers have attracted a great deal of interest due to their potential in biosensing and cell-tracking. Various fabrication techniques have been explored for making microsphere biolasers, such as freeze-drying in a vacuum, standard oil in water dispersion procedure and protein dehydration in a solvent. The protein dehydration is hi...
7 trang | Chia sẻ: thuyduongbt11 | Ngày: 16/06/2022 | Lượt xem: 251 | Lượt tải: 0
Evaluation of thick target PIXE analysis in the 5SDH-2 pelletron accelerator facility at VNU University of ScienceThis paper presents the evaluation of the Thick Target Particle Induced X-rays Emission (TTPIXE) technique using standard samples. The element-dependent standardization factor, H, as a function of X-ray energies is calibrated using standard sample NIST-611 and validated with two standard samples: IAEA-Soil7 and NIES-Pepperbush. The obtained resu...
7 trang | Chia sẻ: thuyduongbt11 | Ngày: 16/06/2022 | Lượt xem: 285 | Lượt tải: 0
Breakdown characteristics of composite insulation for high temperature superconducting cablePolypropylene laminated paper (PPLP) and Kraft paper have been studied as multi-layer insulation for high temperature superconducting cable. The experiment was conducted with AC and impulse voltages. Short-term and long-term breakdown of insulation samples were investigated. The experimental results show that the breakdown voltage becomes smalle...
8 trang | Chia sẻ: thuyduongbt11 | Ngày: 16/06/2022 | Lượt xem: 216 | Lượt tải: 0
A simulation study of the amorphous germania structure up to 70 GPaThis work presents the effect of pressure on the local microstructure of amorphous Germania (GeO2). The Molecular Dynamics simulation was performed on systems at 900 K and high pressure up to 70 GPa. The structural properties have been analyzed through the pair correlation function, coordination number distribution, and structure factors. The st...
7 trang | Chia sẻ: thuyduongbt11 | Ngày: 16/06/2022 | Lượt xem: 670 | Lượt tải: 0
