Hierarchical Growth of ZnO Particles by a Hydrothermal Route |
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Authors: | Faith Bamiduro Michael B. Ward Richard Brydson Steven J. Milne |
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Affiliation: | Institute of Materials Research (IMR), School of Process, Environmental and Materials Engineering, University of Leeds, , Leeds, LS2 9JT UK |
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Abstract: | 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. |
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