Density control of ZnO nanowires grown using Au-PMMA nanoparticles and their growth behavior.
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.
UNIST (Ulsan National Institute of Science and Technology), BanYeon-Ri 194, Ulsan 689-805, Korea. shin@unist.ac.kr
Hyeon Suk
HS
Shin
Jung Inn
JI
Sohn
Dong Chung
DC
Kim
Wilhelm T S
WT
Huck
Mark E
ME
Welland
Hee Cheul
HC
Choi
Dae Joon
DJ
Kang
D003460:Crystallization / Q000379:methods*; D006046:Gold / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D013499:Surface Properties; D015034:Zinc Oxide / Q000737:chemistry*
D046911:Macromolecular Substances; D006046:Gold; D019904:Polymethyl Methacrylate; D015034:Zinc Oxide