Self-Assembly of ZnO Nanorods and Nanosheets into Hollow Microhemispheres and Microspheres


  • This work was partially supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. CUHK4027/02P). We thank Prof. Yitai Qian from the University of Science and Technology of China for his kind help and Mr. Tze Kin Cheung from the Hong Kong University of Science and Technology for technical assistance on TEM and HRTEM measurements. Supporting Information is available online from Wiley InterScience or from the author.


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Hollow microhemisphere and microsphere patterns (see Figure) can be selectively created from the self-assembly of ZnO nanorods and thin nanosheets, respectively. It appears that these distinctive superstructures can evolve from spherical-nanocluster-based aggregates under controlled conditions, presenting the promise of a self-assembly route to curved, multidimensionally ordered superstructures from one and two-dimensional nanocrystal building blocks.