Photocatalysis Using ZnO Thin Films and Nanoneedles Grown by Metal–Organic Chemical Vapor Deposition


  • This work was supported by the National Creative Research Initiative Project and the National R&D Project for Nano Science and Technology (No. M-0214-00-0115), the Advanced Environmental Biotechnology Research Center (No. R11-2003-006), and the Brain Korea 21 project.


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Highly efficient photocatalytic ZnO nanoneedle arrays with a large surface/volume ratio were prepared on inexpensive, large-area substrates using metal–organic chemical vapor deposition. The photocatalytic activity of ZnO nanoneedle arrays is much enhanced due to their increased surface/volume ratio. It is believed that the “bottom–up” approach may be expanded to create many other one-dimensional oxide semiconductor nanostructures (see Figure).