Fabrication of the ZnO/NiO p–n junction foam for the enhanced sensing performance

作     者：Jing-Jing Liang Ming-Gang Zhao Long-Jiang Ding Si-Si Fan Shou-Gang Chen 

作者机构：Department of Materials Science and Engineering Ocean University of China Qingdao 266100 China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2017年第28卷第3期

页      面：670-674页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0703[理学-化学] 

基　　金：sponsored by Qingdao City Programs for Scienceand Technology Plan Projects(No.15-9-1-82-jch) National Natural Science Foundation of China(No.51572249) Fundamental Research Funds for the Central University(No.201513008) Natural Science Foundation of Shandong Province(No.ZR2014EMM021) 

主　　题：ZnO/NiO p–n junction 3D architecture Electrochemical detection Dopamine 

摘      要：P-Type NiO foam with rough nanostructured surface was prepared by the surface treatment of Ni foam,and then it was decorated with n-type ZnO nanopyramids to construct a 3D p–n junction foam. The p–n junction foam was used for electrochemical detection of dopamine and the sensing performance was improved significantly compared with the single NiO and ZnO. High sensitivity（171 mμA/mmol/L）, fast response（2 s）, excellent selectivity and stability were achieved. It was attributed to the introduction of numerous p–n junction interfaces, the interfacial potential barrier played as a tuning factor for the electrochemical determination of dopamine. The results demonstrated it would be an important way to improve the biosensing performance by introducing the p–n junction interfaces.