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Title: Large ZnO mesocrystals of hexagonal columnar morphology derived from liquid crystal templates
Authors: Li, H.
Zhang, Y. 
Liu, H.
Wang, J. 
Issue Date: Oct-2011
Citation: Li, H., Zhang, Y., Liu, H., Wang, J. (2011-10). Large ZnO mesocrystals of hexagonal columnar morphology derived from liquid crystal templates. Journal of the American Ceramic Society 94 (10) : 3267-3275. ScholarBank@NUS Repository.
Abstract: 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. © 2011 The American Ceramic Society.
Source Title: Journal of the American Ceramic Society
ISSN: 00027820
DOI: 10.1111/j.1551-2916.2011.04498.x
Appears in Collections:Staff Publications

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