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

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

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

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). Thedensity 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.

Original languageEnglish
Article number085601
JournalNanotechnology
Volume20
Issue number8
DOIs
StatePublished - 2009

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