Yu-Feng YaoHuang-Hui LinKeng-Ping ChouShaobo YangYean-Woei KiangC. C. YangCHIH-CHUNG YANG2019-10-312019-10-312018https://scholars.lib.ntu.edu.tw/handle/123456789/429734Persistent Zn-polarity of Ga-doped ZnO nanoneedles grown with the vapor-liquid-solid mode on substrates of opposite polaritiesconference paper