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Fabrication of Hourglass-Like ZnO Particles with Enhanced Blue Emission

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Abstract:

Hourglass-like ZnO microcrystals with circular cross sections have been synthesized through a solvothermal method. Two kinds of morphologies have been observed: glabrous hourglasses with relatively smooth surface which show single-crystalline diffraction behavior; and crinite ones covered by irregular ZnO nanowires with diameters of about 20–30 nm and lengths up to 200 nm which show polycrystalline diffraction behavior. Time-dependent experiment is introduced to reveal the growth mechanism. Moreover, it was found that both the reaction temperature and the solution environment play a key role in the fabrication of ZnO hourglasses. The ZnO hourglasses have reduced ultraviolet emission and enhanced blue emission with a dominant peak at 467.2 nm and three weak peaks at 451, 481, and 492 nm.

Keywords: HOURGLASSES; MICROCRYSTALS; SOLVOTHERMAL; ZNO

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2010.2538

Publication date: October 1, 2010

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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