Abstract By orthogonal design theory, technological parameters of chrysanthemum-like ZnO particles prepared in a hydrothermal process are optimized. This paper reports a set of technological parameters for growing chrysanthemum-like ZnO particles on a large scale. It investigates the morphologies and crystalline structures of the as-synthesized three-dimensional ZnO particles with a scanning electron microscope, x-ray diffractometer and transmission electron microscope, and the possible growth mechanism on the three-dimensional ZnO particles. The experimental results indicate that the values of $\varepsilon'$, $\varepsilon''$ and tan$\delta_{\rm e}$ gradually increase in the X band with the improvement of the developmental level of chrysanthemum-like ZnO particles, implying that the electromagnetic wave absorbing property depends on the morphologies of three-dimensional ZnO particles.
Received: 05 December 2008
Revised: 10 March 2009
Accepted manuscript online:
(Methods of micro- and nanofabrication and processing)
Fund: Project supported by the National
High Technology Research and Development Program of China (Grant No
2005A000200), the Xi'an Applied Materials Innovation Fund (Grant No
XA-AM-200712), and the Innovative Experiment Program for Chinese
students (Grant No State
200721).
Cite this article:
Yan Jun-Feng(闫军锋), Zhang Zhi-Yong(张志勇), You Tian-Gui(游天桂), Zhao Wu(赵武), and Yun Jiang-Ni(贠江妮) Hydrothermal synthesis and dielectric properties of chrysanthemum-like ZnO particles 2009 Chin. Phys. B 18 4019
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.