title: Modification of graphene on ultramicroelectrode array and its application in detection of dissolved oxygen.
abstract: This paper investigated two different modification methods of graphene (GN) on ultramicroelectrode array (UMEA) and applied the GN modified UMEA for the determination of dissolved oxygen (DO). The UMEAs were fabricated by Micro Electro-Mechanical System (MEMS) technique and the radius of each ultramicroelectrode is 10 μm. GN-NH2 and GN-COOH were modified on UMEA by using self-assembling method. Compared with GN-NH2 modified UMEA, the GN-COOH modified UMEA showed better electrochemical reduction to DO, owing to better dispersing and more active sites. The GN-COOH on UMEA was electroreduced to reduced GN-COOH (rGN-COOH) to increase the conductivity and the catalysis performance. Finally, the palladium nanoparticles/rGN-COOH composite was incorporated into DO microsensor for the detection of DO.
authors.affiliation: State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China. binfen328@163.com.
authors.forename: Jinfen
authors.initials: J
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China. cbian@mail.ie.ac.cn.
authors.forename: Chao
authors.initials: C
authors.lastname: Bian
authors.affiliation: State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China. jhtong@mail.ie.ac.cn.
authors.forename: Jianhua
authors.initials: J
authors.lastname: Tong
authors.affiliation: State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China. sunjizhou628@163.com.
authors.forename: Jizhou
authors.initials: J
authors.lastname: Sun
authors.affiliation: State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China. math101@163.com.
authors.forename: Yang
authors.initials: Y
authors.lastname: Li
authors.affiliation: National Key Laboratory of Microwave Imaging Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China. grad.mitl@mail.ie.ac.cn.
authors.forename: Wen
authors.initials: W
authors.lastname: Hong
authors.affiliation: State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China. shxia@mail.ie.ac.cn.
authors.forename: Shanhong
authors.initials: S
authors.lastname: Xia