Publication Date:
2012-04-25
Description:
To controllably construct ZnO -base heterostructures, unique ZnO hexagonal quasi-hourglasses have been synthesized by a microwave-assisted hydrothermal approach. The phase purity and the morphologies of as-prepared samples have been determined by using X-ray powder diffractometer, field-emission scanning electron microscopy and transmission electron microscopy. We have rationally discussed the growth and reaction mechanism and revealed the morphological evolution of ZnO hexagonal quasi-hourglasses. Dodecylamine, as well as the initial concentration of zinc source, the reaction temperature and time, play an important part in the synthesis of ZnO hexagonal quasi-hourglasses. Between ZnO and Zn 5 ( OH ) 8 ( NO 3 ) 2 , a reversible reaction seldom reported occurs in a circular manner as the reaction proceeds continuously. The presence of ZnO multipods in the products and the controllable synthesis of half of ZnO hexagonal quasi-hourglass betoken a possibility to synthesize ZnO hierarchical architectures, even ZnO -base heterostructures by using this kind of ZnO building blocks.
Print ISSN:
0002-7820
Electronic ISSN:
1551-2916
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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