title: Intensify the application of ZnO-based nanodevices in humid environment: O2/H2 plasma suppressed the spontaneous reaction of amorphous ZnO nanowires.
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.
authors.affiliation: Department of Physics, Tamkang University, Tansui 25137, Taiwan.
authors.forename: Chun-Yen
authors.initials: CY
authors.lastname: Lai
authors.affiliation: Department of Physics, Tamkang University, Tansui 25137, Taiwan.
authors.forename: Tzu-Chiao
authors.initials: TC
authors.lastname: Chien
authors.affiliation: Department of Physics, Tamkang University, Tansui 25137, Taiwan.
authors.forename: Ting-Yi
authors.initials: TY
authors.lastname: Lin
authors.affiliation: Department of Physics, Tamkang University, Tansui 25137, Taiwan.
authors.forename: Teng
authors.initials: T
authors.lastname: Ke
authors.affiliation: Department of Physics, Tamkang University, Tansui 25137, Taiwan.
authors.forename: Shih-Han
authors.initials: SH
authors.lastname: Hsu
authors.affiliation: Department of Physics, Tamkang University, Tansui 25137, Taiwan.
authors.forename: Yun-Ju
authors.initials: YJ
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu 30050, Taiwan.
authors.forename: Chien-Ying
authors.initials: CY
authors.lastname: Su
authors.affiliation: Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu 30050, Taiwan.
authors.forename: Jeng-Tzong
authors.initials: JT
authors.lastname: Sheu
authors.affiliation: Department of Physics, Tamkang University, Tansui 25137, Taiwan.
authors.forename: Ping-Hung
authors.initials: PH
authors.lastname: Yeh
keywords: Humidity reaction; Plasma passivation; Spontaneous reaction; a-ZnO