Abstract
Uniform flower-like ZnO superstructures were rapidly prepared on a large scale via a simple and inexpensive solution approach at room temperature. These ZnO microflowers having a mean diameter of about 4μm, were assembled by numerous porous ZnO nanosheets with a thickness of 40nm. The concentration of trisodium citrate and sodium hydroxide has great influence on the morphology of the final products, respectively. At room temperature, the photoluminescence (PL) spectrum showed that the ZnO microflowers exhibited a very weak UV emission peak located at 380nm and a relatively strong green emission peak centered at 565nm. This economical and efficient work may provide new insights into the fabrication of other metal oxide microstructures.
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