Growth mechanism of tubular ZnO formed in aqueous solution
Xu, C. X.
Tan, Swee Tiam
Date of Issue2006
School of Materials Science and Engineering
Tubular ZnO microstructural arrays were fabricated by a hydrothermal decomposition method. The dependence of the morphologies on the growth time and temperature was investigated in detail. An experiment was carried out to determine the mechanism of tubular ZnO formation. Our results showed that ZnO microtubes originated from an ageing process from ZnO microrods at a lower temperature (compared to the temperature when hydrothermal deposition of ZnO microrods was dominant) due to the preferential chemical dissolution of the metastable Zn-rich (0001) polar surfaces. A growth model was proposed based on the coexistence of hydrothermal deposition and dissolution of ZnO in the fabrication process.
© 2006 Institute of Physics Publishing. This is the author created version of a work that has been peer reviewed and accepted for publication by Nanotechnology, Institute of Physics Publishing. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: http://dx.doi.org/10.1088/0957-4484/17/6/033 ]