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Growth of ZnO Nanostructures by Using Ultrasonic Spray Chemical Vapor Deposition with a Au Catalyst
Hiroyuki Nishinaka,Toshiyuki Kawaharamura,Shizuo Fujita 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.5
ZnO nanorods were grown by using an ultrasonic spray chemical vapor deposition method with a Au catalyst. The growth was performed in the vapor-liquid-solid growth mode. The lowmagnification and the high-resolution transmission electron microscopy (TEM) observation revealed that the ZnO nanorods had no stacking faults and were single crystals. The high-esolution TEM showed that the lattice length of the ZnO nanorods grown at 900 ℃ was 0.16 nm and that the growth direction was [11¯20]. The diameters of the ZnO nanorods almost depended on those of the Au particles that aggregated from a Au thin film. The diameters of the ZnO nanorods were slightly bigger than those of the Au particles because the ZnO nanorods grew not only in the direction along the nanorods but also in the direction of the diameter. The room-temperature photoluminescence emission of the ZnO nanorods was dominated by a near band-edge luminescence with weak deep-level emissions.