PHYS 13 |
| Monodisperse Nanocrystals (NCs) with regular shapes and narrow size distributions have been seen as idea building blocks to construct various complex superstructures and advanced materials due to their unique physical properties and tunable compositions(1-3). Herein, we report a versatile pathway to assemble functional NCs towards 3D colloidal spheres with internal closed-packed structures (4). These NCs integrated 3D colloidal spheres could also be used as secondary building blocks to organize macroscale structures or photonic crystals, and moreover, these functional colloidal spheres could be readily convert to mesoporous materials with highly crystalline frameworks when remove the surfactants after annealed at design temperature. As-obtained mesoprouse materials with large surface area (~800m2g-1) and controllable pore sizes (3.8nm) exhibit strongly potential applications in catalysis (5). 1. Wang X, Peng Q, Li YD Interface-mediated growth of monodispersed nanostructures Accounts of Chemical Research 40 (8): 635-643 AUG 2007 2. Zhuang ZB, Peng Q, Wang X, Li YD, Tetrahedral Colloidal Crystals of Ag2S Nanocrystals, Angewandte Chemie International Edition, 46, Nov, 2007, 8174-8177 3. Wang X, Zhuang J, Peng Q, Li YD. A general strategy for nanocrystal synthesis Nature 437 (7055): 121-124 SEP 1 2005 4. Bai F. Li YD et.al A versatile bottom-up assembly approach to colloidal spheres from nanocrystals, Angewandte Chemie-International Edition 46 (35): 6650-6653 2007. 5. Huo ZY, Li YD, A novel nanocrystals integrated TiO2 meseporous materials. Unpublished results. |
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Nanostructured Materials
8:10 AM-12:00 PM, Sunday, April 6, 2008 Morial Convention Center -- Rm. 338/339, Oral
Division of Physical Chemistry |