Controllable Synthesis of Single-Crystalline CdO and Cd(OH)2Nanowires by a Simple Hydrothermal Approach
1 Nanjing National Laboratory of Microstructures and Department of Physics, Nanjing University, 210093, Nanjing, People’s Republic of China
2 Chemistry Department, Hong Kong Baptist University, Hong Kong, People’s Republic of China
3 Laser Institute, Qufu Normal University, 273165, Qufu, People’s Republic of China
Nanoscale Research Letters 2010, 5:961-965 doi:10.1007/s11671-010-9589-yPublished: 11 April 2010
Single-crystalline Cd(OH)2 or CdO nanowires can be selectively synthesized at 150 °C by a simple hydrothermal method using aqueous Cd(NO3)2 as precursor. The method is biosafe, and compared to the conventional oil-water surfactant approach, more environmental-benign. As revealed by the XRD results, CdO or Cd(OH)2 nanowires can be generated in high purity by varying the time of synthesis. The results of FESEM and HRTEM analysis show that the CdO nanowires are formed in bundles. Over the CdO-nanowire bundles, photoluminescence at ~517 nm attributable to near band-edge emission of CdO was recorded. Based on the experimental results, a possible growth mechanism of the products is proposed.