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TitleUnderstanding the selective etching of electrodeposited ZnO nanorods
Publication TypeJournal Article
Year of Publication2014
AuthorsIlly, B.N., Ingham B., Toney M.F., Nandhakumar I., and Ryan M.P.
Pagination14079 - 14085
Date Published2014
ISSN07437463 (ISSN)
KeywordsChloride concentrations, Chloride ion concentration, Chlorine compounds, Control rods, Dissolution, Dissolution mechanism, Dissolution process, Electrodeposition, Etching, Nanorods, pH effects, Rate of dissolutions, Selective dissolution, Selective etching, Thin walled structures, Ultra-thin-walled tubes, Yarn, Zinc oxide
AbstractZnO nanotubes were prepared by selective dissolution of electrodeposited nanorods. The effect of solution pH, rod morphology, and chloride ion concentration on the dissolution mechanism was studied. The selective etching was rationalized in terms of the surface energy of the different ZnO crystal faces and reactant diffusion. The nanorod diameter and chloride concentration are the most influential parameters on the dissolution mechanism because they control homogeneous dissolution or selective etching of the (110) and (002) surfaces. Bulk solution pH only has an effect on the rate of dissolution. By accurate control of the dissolution process, the nanomorphology can be tailored, and the formation of rods with a thin diameter (10-20 nm), cavity, or ultra-thin-walled tubes (2-5 nm) can be achieved. © 2014 American Chemical Society.

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