Intensify the application of ZnO-based nanodevices in humid environment: O2/H2 plasma suppressed the spontaneous reaction of amorphous ZnO nanowires |
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| Authors: | Chun-Yen Lai Tzu-Chiao Chien Ting-Yi Lin Teng Ke Shih-Han Hsu Yun-Ju Lee Chien-ying Su Jeng-Tzong Sheu Ping-Hung Yeh |
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| Affiliation: | 1.Department of Physics, Tamkang University, Tansui 25137, Taiwan;2.Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu 30050, Taiwan |
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| Abstract: | In this work, we have demonstrated that amorphous ZnO nanobranches (a-ZnO NBs) could spontaneously react from the crystalline ZnO NWs (c-ZnO NWs) at specific humid environment. The spontaneous reaction mechanism and result can be analyzed by humidity controlling and optical microscope (OM)/scanning electron microscope (SEM)/Kelvin probe force microscopy (KPFM)/transmission electron microscopy (TEM) system. We can make the c-ZnO NWs spontaneous reaction happen at different humid environments and suppress the a-ZnO NBs spontaneous reaction by oxygen/hydrogen plasma surface passivation. The hydrogen plasma surface treatment also can improve the UV sensing sensitivity more than twofold. This work provides the mechanism and methods of the a-ZnO NBs spontaneous growth and offers the passivation treatment for strengthening and enhancing ZnO-based nanodevice application in humid environment and UV light detection, respectively. |
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| Keywords: | Spontaneous reaction Humidity reaction a-ZnO Plasma passivation |
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