Modification of Graphene on Ultramicroelectrode Array and Its Application in Detection of Dissolved Oxygen

Sensors

Jinfen Wang¹  Chao Bian¹  Jianhua Tong¹  Jizhou Sun¹  Yang Li¹  Wen Hong² 

[1] State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China; E-Mails:;National Key Laboratory of Microwave Imaging Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China; E-Mail:

关键词: graphene;    ultramicroelectrode array;    dissolved oxygen;    microsensor;    MEMS;   

DOI  :  10.3390/s150100382

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.