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Nucleation and Growth of BaF x Cl 2− x Nanorods
Author(s) -
Xie Ting,
Li Shuai,
Wang Wenbei,
Peng Qing,
Li Yadong
Publication year - 2008
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200800363
Subject(s) - nanorod , nucleation , orthorhombic crystal system , nanocrystal , nanowire , materials science , pulmonary surfactant , chemical engineering , surface energy , dispersity , nanotechnology , chemical physics , crystallography , chemistry , thermodynamics , crystal structure , physics , composite material , polymer chemistry , engineering
Different ratios and sizes of Ba 2 F 3 Cl (BaF x Cl 2− x , x =1.5) nanorods and nanowires and orthorhombic BaF 2 (BaF x Cl 2− x , x =2) nanorods were prepared by using a liquid–solid–solution approach at 160∼180 °C. The processes and results of the experiments conducted to prepare monodisperse Ba 2 F 3 Cl nanorods and nanowires showed that the specific surface area increased as the initial concentrations were multiplied. Based on this fact, a mechanism for the nucleation and growth processes of these nanocrystals that have a variety of enlarged sizes was substantiated in view of the surface chemical thermodynamics (SCT). In this SCT mechanism, the specific surface energy takes into account both the surfactant oleic acid and the nanocrystal surface, and is dominated by the chemical potential of the adsorbate.