Microstructure of La<SUB align=right>0.7Sr<SUB align=right>0.3Mn<SUB align=right>1­xZn<SUB align=right>xO<SUB align=right>3 nano-perovskites investigated by electron microscopy technique
Source: International Journal of Nanotechnology, Volume 8, Numbers 3-5, 2011 , pp. 268-277(10)
Publisher: Inderscience Publishers
Abstract:The nano-perovskites La<SUB align=right>0.7Sr<SUB align=right>0.3Mn<SUB align=right>1­xZn<SUB align=right>xO<SUB align=right>3 (x = 0, 0.2, 0.3 and 0.4) synthesised by citrate sol-gel method were studied by using Selected Area Electron Diffraction (SAED) and High-Resolution Transmission Electron Microscope (HRTEM) in the bright-field and dark-field configurations. The obtained results show that the grain size and morphology depend on both the Zn-content and calcinating temperature. The synthesised nanoparticles have grain sizes distributed in the range of 10-40 nm, appearing in sphere and peanut-bulb morphology. Influences of various synthesis conditions on the formation of crystalline structure and relation between grain sizes, particle morphology, specific surface area (BET) and catalytic activity of nanomaterial were discussed.
Document Type: Research article
Affiliations: 1: Institute of Material Sciences, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet Street, Cau Giay District, Hanoi City, Vietnam. 2: Department of Physics, Vinh University, 182 Le Duan Street, Vinh City, Nghe An Province, Vietnam. 3: Institute of Physics, TU-Chemnitz, Chemnitz, Germany
Publication date: 2011-01-01