Study on Field Emission Characteristics of Ti-based Chrysanthemum-like Nano-ZnO Cathode by Electrophoresis Deposition. Issue 11 (November 2015)

• Record Type: Journal Article
• Authors: Yanning, Yang; Zhiyong, Zhang; Junfeng, Yan; Qiaoping, Liu; Fuchun, Zhang; Weixia, Li
• Is Part Of: Xi you jin shu cai liao yu gong cheng. Volume 44:Issue 11(2015)
• Page Start: 2711
• Page End: 2715
• Publication Date: 2015-11
• Subjects: chrysanthemum-like ZnO -- hydrothermal process -- electrophoresis method -- field emission; Nonferrous metals -- Periodicals; 669.05
• DOI: 10.1016/S1875-5372(16)60024-3
• Languages: English
• ISSNs: 1875-5372

Abstract

Abstract: Chrysanthemum-like ZnO nanowire clusters were prepared by hydrothermal process, then were transferred to Ti substrate by electrophoresis method, and uniform ZnO nano-film with certain thickness was formed. Finally ZnO field emission cathode sample was fabricated after vacuum heat treatment. The microstructure and the morphology of chrysanthemum-like ZnO nanowire clusters were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM), respectively. Field emission tests were conducted for cathode samples after heat treatment, results reveal that the low turn-on field is 2.0 V/μm for the chrysanthemum-like ZnO, and the threshold field is 5.5 V/μm. Moreover, the field emission current density is 200 μA/cm 2 under the condition of electric field of 7.5 V/μm, and the field emission current density and its stability can be effectively improved by appropriate enlarging the thickness of the ZnO coating. The field emission mechanism was also explored.