Abstract
The self-assembly of solid or tubular ZnO microrods into hexagonal twinning microprisms were achieved by choosing different solvents under a simple hydrothermal route. The composed solid or tubular ZnO microrods, as self-assembly building blocks, are single crystals with the [0 0 0 1] growth crystallographic direction; and most of them have diameters of ∼2.8 μm, lengths of up to ∼4.6 μm. Room-temperature photoluminescence spectrum of the solid ZnO microstructures reveals a strong emission band located at 397 nm and two broad emission bands at about 485 nm, 528 nm, respectively. A possible growth mechanism has been proposed. It is expected that the present ZnO microstructures have some potential applications in optoelectronic devices.
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