Abstract
ZnO microcrystals with novel structures have been synthesized by a solvothermal method that is facile, low-cost and environment-friendly. Zn(NO3)2·6H2O is the only precursor and absolute ethanol is the solvent. By controlling the reaction time, temperature and molarity of zinc nitrate, ZnO entities with the shape of flower, nut, hexagon-pillar, popcorn, brush and sphere can be synthesized in high selectivity. The ZnO micronuts (length ∼8 μm and width ∼5 μm) are uniform in morphology, displaying an open gap on the surface that divides the body into two. The investigation on the optical properties of the ZnO microcrystals reveals that all the ZnO samples exhibit an excitonic absorption edge around 376 nm, and compared to bulk ZnO, there is a modest red shift of ∼6 nm that can be ascribed to size effect as well as the unique morphologies of the ZnO microcrystals.
Original language | English |
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Pages (from-to) | 3403-3408 |
Number of pages | 6 |
Journal | Journal of Alloys and Compounds |
Volume | 509 |
Issue number | 7 |
DOIs | |
Publication status | Published - 17 Feb 2011 |
Scopus Subject Areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
User-Defined Keywords
- Chemical synthesis
- Crystal growth
- Luminescence
- Semiconductors