Chế tạo các nano bạc dị hướng bằng kích thích tổ hợp LED xanh lá và LED xanh dương cho ứng dụng phát hiện MelaminBài báo này trình bày các nano bạc dị hướng được chế tạo bằng phương pháp quang hóa bằng cách lần lượt kích thích ánh sáng LED xanh lá và LED xanh dương với các thời gian khác nhau lên các mầm nano cầu kích thước nhỏ (~7 nm). Hình thái, kích thước được khảo sát bằng kính hiển vi điện tử quét phát xạ trường (FESEM). Cấu trúc tinh thể, thành phầ...
8 trang | Chia sẻ: thuyduongbt11 | Ngày: 16/06/2022 | Lượt xem: 195 | Lượt tải: 0
Fabrication, characterization of SiO₂ nanospheres and SiO₂ opal photonic crystalsIn this report, we presented the usage of Stober method to fabricate SiO2 nanospheres and self-assembly method to make SiO2 opal photonic crystals based on the fabricated SiO2 nanospheres. An averaged size of SiO2 nanospheres was controlled by varying concentrations of NH4OH and TEOS. Crystal structure and morphology of particles was investigate...
6 trang | Chia sẻ: thuyduongbt11 | Ngày: 16/06/2022 | Lượt xem: 206 | Lượt tải: 0
Environmental factors influencing Chlorophyll-a concentration in Tri An reservoir, VietnamChlorophyll-a (Chl-a) has been used extensively as an essential indicator of trophic state in the assessment and monitoring of surface water quality environments. The environmental factors can influence Chl-a concentrations; thus, to determine the relationship between Chl-a concentration and factors. The research was carried out in dry season (M...
11 trang | Chia sẻ: thuyduongbt11 | Ngày: 16/06/2022 | Lượt xem: 296 | Lượt tải: 0
Combining the mie-lennard-jones and the morse potentials in studying the elastic deformation of interstitial alloy AGC with FCC structure under pressureIn this study, the mean nearest neighbor distance between two atoms, the Helmholtz free energy and characteristic quantities for elastic deformation such as elastic moduli E, G, K and elastic constants C11, C12, C44 for binary interstitial alloys with FCC structure under pressure are derived with the statistical moment method. The numerical calc...
12 trang | Chia sẻ: thuyduongbt11 | Ngày: 16/06/2022 | Lượt xem: 246 | Lượt tải: 0
Synthesis of ZnO nanoparticles/nanofibers and their luminescence via electrospinningThis article reports on the synthesis procedure of ZnO nanoparticles/nanofibers structure by electrospinning method using Zinc acetate and polyvinylpyrrolidone (PVP) surfactant as reagents and evaluates their luminescent properties. The microstructure of ZnO nanoparticles/nanofibers was observed by FE-SEM. The phase formation of ZnO nanoparticl...
5 trang | Chia sẻ: thuyduongbt11 | Ngày: 16/06/2022 | Lượt xem: 209 | Lượt tải: 0
The enhancement of visible absorption of Cu doped ZnO nanorods on patterned substratesWe report the antireflection and light absorption in visible region by new stretchable substrates with patterned structure. Mogul substrates with 3-Dimentional structures were fabricated by using polydimethyl – siloxane that imitate the nanostructures surface. Then, Copper doped ZnO NRs on mogul-patterned surface by hydrothermal method at low te...
8 trang | Chia sẻ: thuyduongbt11 | Ngày: 16/06/2022 | Lượt xem: 223 | Lượt tải: 0
Synthesis and Characterization of silver nanoparticles for antibacterial application against Bacillus subtilis and Pseudomonas aeruginosaIn this study, the stable silver nanoparticles (AgNPs) were synthesized by reducing silver nitrate (AgNO3) using trisodium citrate (TSC). The product was characterized by Ultraviolet-Visible spectroscopy, Fourier-transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM) and X-ray diffraction analysis (XRD). UV-Vis spectrum s...
7 trang | Chia sẻ: thuyduongbt11 | Ngày: 16/06/2022 | Lượt xem: 251 | Lượt tải: 0
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: 185 | 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: 279 | 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: 252 | Lượt tải: 0
