title: Direct synthesis of ultrafine tetragonal BaTiO3 nanoparticles at room temperature.
abstract: A large quantity of ultrafine tetragonal barium titanate (BaTiO3) nanoparticles is directly synthesized at room temperature. The crystalline form and grain size are checked by both X-ray diffraction and transmission electron microscopy. The results revealed that the perovskite nanoparticles as fine as 7 nm have been synthesized. The phase transition of the as-prepared nanoparticles is investigated by the temperature-dependent Raman spectrum and shows the similar tendency to that of bulk BaTiO3 materials. It is confirmed that the nanoparticles have tetragonal phase at room temperature.
authors.affiliation: Department of Materials Sciences and Engineering, Northeastern University at Qinhuangdao Branch, Qinhuangdao, Hebei Province, 066004, Peoples Republic of China. jianquanqi@mail.tsinghua.edu.cn.
authors.forename: Jian Quan
authors.initials: JQ
authors.lastname: Qi
authors.forename: Tao
authors.initials: T
authors.lastname: Peng
authors.forename: Yong Ming
authors.initials: YM
authors.lastname: Hu
authors.forename: Li
authors.initials: L
authors.lastname: Sun
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
authors.forename: Wan Ping
authors.initials: WP
authors.lastname: Chen
authors.forename: Long Tu
authors.initials: LT
authors.lastname: Li
authors.forename: Ce Wen
authors.initials: CW
authors.lastname: Nan
authors.forename: Helen Lai Wah
authors.initials: HL
authors.lastname: Chan