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Hierarchical Growth of ZnO Particles by a Hydrothermal Route
Author(s) -
Bamiduro Faith,
Ward Michael B.,
Brydson Richard,
Milne Steven J.
Publication year - 2014
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12809
Subject(s) - crystallization , crystallite , hydrothermal circulation , transmission electron microscopy , materials science , chemical engineering , scanning electron microscope , hexagonal crystal system , nanoparticle , crystal growth , nanocrystal , hydrothermal synthesis , sodium hydroxide , crystallography , zinc , nanotechnology , rod , mineralogy , chemistry , composite material , metallurgy , medicine , alternative medicine , pathology , engineering
The crystallization of ZnO microrods by hydrothermal treatment of a suspension formed from reaction of zinc acetate and sodium hydroxide has been examined using scanning and transmission electron microscopy. Polycrystalline hexagonal ZnO microrods first appeared after 0.5 h reaction time at 120°C. These early stage rods were composed of stacks of hexagonal layers, each ~50 nm in thickness containing closely aligned assemblies of nanocrystallites <20 nm in size. Further growth of the microrods involved columns of nanoparticles extending from the basal layers of the preformed hexagonal stacks. Re‐crystallization produced single‐crystal microrods, many of which existed as twin particles.