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Preparation of three‐dimensional symmetric dendrites of BaWO 4 microcrystals
Author(s) -
Jung HyeYun,
Huh YoungDuk
Publication year - 2015
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201400310
Subject(s) - oleylamine , hexane , bilayer , phase (matter) , crystallography , aqueous solution , chemistry , barium , stacking , materials science , chemical engineering , inorganic chemistry , organic chemistry , nanotechnology , membrane , biochemistry , nanoparticle , engineering
Three‐dimensional symmetric dendrites of BaWO 4 were prepared by performing solvothermal reactions in water‐hexane bilayer solutions that contained a barium‐oleate complex in the hexane layer and sodium tungstate in the water layer. The barium‐oleate complex in hexane was obtained via a phase transfer reaction in which aqueous Ba 2+ ions pass into the hexane phase with the assistance of sodium oleate, oleic acid, and oleylamine. Each of the BaWO 4 dendrites has a three‐dimensional structure with one trunk along the c ‐axis and a series of four branches perpendicular to the trunk. As the reaction temperature or the amount of oleylamine increases, BaWO 4 dendrites with sharper branches and higher order hierarchical structures are formed. The presence of oleylamine plays an important role in the formation of the hierarchical superstructures of BaWO 4 dendrites.