Density control of ZnO nanowires grown using Au-PMMA nanoparticles and their growth behavior

作者：Shin Hyeon Suk; Sohn Jung Inn; Kim Dong Chung; Huck Wilhelm T S; Welland Mark E; Choi Hee Cheul; Kang Dae Joon

来源：Nanotechnology, 2009, 20(8): 085601.

DOI：10.1088/0957-4484/20/8/085601

Au nanoparticles stabilized by poly(methyl methacrylate) (PMMA) were used as a catalyst to grow vertically aligned ZnO nanowires (NWs). The density of ZnO NWs with very uniform diameter was controlled by changing the concentration of Au-PMMA nanoparticles (NPs). The density was in direct proportion to the concentration of Au-PMMA NPs. Furthermore, the growth process of ZnO NWs using Au-PMMA NPs was systematically investigated through comparison with that using Au thin film as a catalyst. Au-PMMA NPs induced polyhedral-shaped bases of ZnO NWs separated from each other, while Au thin film formed a continuous network of bases of ZnO NWs. This approach provides a facile and cost-effective catalyst density control method, allowing us to grow high-quality vertically aligned ZnO NWs suitable for many viable applications.

• 出版日期2009-2-25