P. Joy—contributing editor
Large ZnO Mesocrystals of Hexagonal Columnar Morphology Derived from Liquid Crystal Templates
Article first published online: 4 APR 2011
© 2011 The American Ceramic Society
Journal of the American Ceramic Society
Volume 94, Issue 10, pages 3267–3275, October 2011
How to Cite
Li, H., Zhang, Y., Liu, H. and Wang, J. (2011), Large ZnO Mesocrystals of Hexagonal Columnar Morphology Derived from Liquid Crystal Templates. Journal of the American Ceramic Society, 94: 3267–3275. doi: 10.1111/j.1551-2916.2011.04498.x
This work was financially supported by the Science and Engineering Research Council—A*Star Singapore, under Grant No. 072 101 0013 and the National University of Singapore.
- Issue published online: 4 OCT 2011
- Article first published online: 4 APR 2011
- Manuscript No. 28868. Received November 4, 2010; approved February 7, 2011.
Large ZnO mesocrystals of hexagonal columnar morphology have been successfully synthesized by using liquid crystals (LCs) of cetyltrimethylammonium bromide (CTAB, CH3(CH2)15N+(CH3)3Br−) as templates. The LC-templated growth process is established by monitoring the crystal morphology, phase evolution at various temperature stages for both ZnO building blocks and CTAB templates, where there is a phase transition and interaction between the two involved. In contrast to the well-studied mesocrystals derived from solutions, we propose a new formation scheme for the large mesocrystals, on the basis of our experimental observations using X-ray diffraction phase analysis, Fourier transform infrared, scanning electron microscopy, and transmission electron microscopy conducted at various stages of mesocrystal growth. The resultant mesocrystals are characterized by a level of mesoporosity and internal surfaces, where there is a large population of oxygen vacancies, as confirmed by their photoluminescence behavior.