Ferromagnetism in High-Surface-Area ZnO Nanosheets Prepared by a Template-Assisted Hydrothermal Method  

作　　者：Hui-Fang Yang Ling-Zhi Tang Qiang Sun Lei Sun Zhen-Hua Li Shu-Xia Ren 杨惠芳;唐灵芝;孙强;孙蕾;李振华;任书霞(School of Material Science and Engineering, Shijiazhuang TieDao University)

机构地区：[1]School of Material Science and Engineering, Shijiazhuang TieDao University

出　　处：《Chinese Physics Letters》2018年第6期90-93,共4页中国物理快报（英文版）

基　　金：Supported by the National Key Research and Development Program of China under Grant No 2016YFA0201001;the National Natural Science Foundation of China under Grant No 11574071;the Natural Science Foundation for Outstanding Young Researcher in Hebei Province under Grant No E2016210093;the Natural Science Foundation of Hebei Province under Grant No A2018210123

摘　　要：High-surface-area ZnO nanosheets are prepared using a template-assisted hydrothermal method.A saturation moment as high as 0.02 emu/g is obtained for the ZnO nanosheets.Both photoluminescence spectroscopy and x-ray photoelectron spectroscopy demonstrate the existence of abundant oxygen vacancies on the surfaces of the nanosheets.In addition,the oxygen vacancy concentration increases with an increasing nanosheet surface area.The results show that the origin of the room-temperature ferromagnetism is closely related with a large surface area and oxygen vacancies of the nanosheets.This finding suggests that the high-surface-area ZnO nanosheets are promising to be applied to spintronic devices.High-surface-area ZnO nanosheets are prepared using a template-assisted hydrothermal method.A saturation moment as high as 0.02 emu/g is obtained for the ZnO nanosheets.Both photoluminescence spectroscopy and x-ray photoelectron spectroscopy demonstrate the existence of abundant oxygen vacancies on the surfaces of the nanosheets.In addition,the oxygen vacancy concentration increases with an increasing nanosheet surface area.The results show that the origin of the room-temperature ferromagnetism is closely related with a large surface area and oxygen vacancies of the nanosheets.This finding suggests that the high-surface-area ZnO nanosheets are promising to be applied to spintronic devices.

关 键 词：ZNO Ferromagnetism in High-Surface-Area ZnO Nanosheets Prepared by a Template-Assisted Hydrothermal Method 

分 类 号：TB383[一般工业技术—材料科学与工程]