Abstract
SnO 2 nanorods were deposited on the Si substrates in an aqueous solution containing both SnCl 4 and CO(NH 2) 2. It is found that different self-assembled patterns of SnO 2 nanorods can be obtained by changing the deposition conditions such as the molar ratio of CO(NH 2) 2 to SnCl 4 and the pretreatment of the substrate. Scattered SnO 2 nanorods, for example, can be changed into flower-like patterns when the molar ratio of CO(NH 2) 2 to SnCl 4 is raised, and well-aligned nanorod arrays can be formed when the pretreatment of the substrate is changed. In addition, some interesting patterns, e.g. tree-like patterns, can also be observed.
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