Ex) Article Title, Author, Keywords
New Phys.: Sae Mulli 2019; 69: 41-45
Published online January 31, 2019 https://doi.org/10.3938/NPSM.69.41
Copyright © New Physics: Sae Mulli.
Hong Yeol PARK1, Heesang AHN2, Kyujung KIM3, Yoon-Hwae HWANG*4
This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
We studied the hydrothermal growth condition of ZnO nanostructure arrays on p-GaN substrates that could be used as light-emitting diode (LED) pixel arrays for bioimage sensors. The ZnO nanostructures were grown in the forms of either nanorods or nanoflowers at different substrate temperatures during the ZnO seed-layer deposition. We found that flower-shaped ZnO nanostructures and ZnO nanorods were grown when a rough seed layer and a smooth seed-layer were formed at temperatures lower and higher than 500 $^\circ$C, respectively. With low seed-layer growth temperatures, a rough surface was formed, provided numerous nucleation sites in patterned holes, and produced dense flower-shaped nanostructures. On the other hands, with high seed-layer growth temperatures, a smooth seed-layer surface was formed and provided nucleation sites for ZnO nanorod growth.
Keywords: GaN/ZnO, Nanorod, Nanoflower, Hydrothermal