Abstract
Abstract Porous SnO 2 nanocrystalline thin films were successfully electrodeposited from an oxygen-saturated acid aqueous solution of SnCl 2 containing different concentrations of butyl-rhodamine B (BRhB) at 70 °C. BRhB with substitute of amidocyanogen can be dissolved in the acid deposition solution, where HCl was added to suppress hydrolysis of SnCl 2 . So it was used as a structure-directing agent to promote the crystal growth of SnO 2 . The formed porous morphology and tetragonal rutile crystalline structure of the electrodeposited thin films were controlled by the addition of BRhB with different amounts.
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