| Title |
Synthesis and Formation Mechanism of ZnO Nanotubes via an Electrochemical Method |
| Authors |
문진영(Jin Young Moon); 김형훈(Hyung Hoon Kim); 이호성(Ho Seong Lee) |
| DOI |
https://doi.org/10.3365/KJMM.2011.49.5.400 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
optoelectronic materials; chemical synthesis; microstructure; transmission electron microscopy; TEM; nanotube |
| Abstract |
ZnO nanotube arrays were synthesized by a two-step process: electrodeposition and selective dissolution. In the first step, ZnO nanorod arrays were grown on an Au/Si substrate by using a homemade electrodeposition system. ZnO nanorod arrays were then selectively dissolved in an etching solution composed of 0.125 M NaOH, resulting in hollow ZnO nanotube arrays. It is suggested that the formation mechanism of the ZnO nanotube arrays might be attributed to the preferred surface adsorption of hydroxide ion (OH-1) on a positive polar surface followed by selective dissolution of the metastable Zn-terminated ZnO (0001) polar surface caused by the difference in the surface energy per unit area between the ZnO nanorod and nanotube. |