A Solution Chemistry Approach for the Selective Formation of Ultralong Nanowire Bundles of Crystalline Cd(OH)2 on Substrates


  • This work was supported by the Hydrogen Energy R&D Center, a 21st century Frontier R&D Program funded by the Ministry of Science and Technology of Korea. VRS acknowledges support from the BK-21 Program. Supporting Information is available online from Wiley InterScience or from the author.


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The controlled precipitation of a supersaturated Cd2+ solution is used to selectively deposit Cd(OH)2 nanowire bundles on a substrate. As schematically depicted in the figure, when the Cd2+ ionic product exceeds the solubility product, heterogeneous and homogeneous nucleation occur independently on the substrate and in the solution to give nanowire bundles and hexagonal plates, respectively.