Wang Jinfen, Bian Chao, Tong Jianhua, Sun Jizhou, Li Yang, Hong Wen, Xia Shanhong
State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China.
National Key Laboratory of Microwave Imaging Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China.
Sensors (Basel). 2014 Dec 26;15(1):382-93. doi: 10.3390/s150100382.
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.
本文研究了石墨烯（GN）在超微电极阵列（UMEA）上的两种不同修饰方法，并将GN修饰的UMEA应用于溶解氧（DO）的测定。UMEA采用微机电系统（MEMS）技术制备，每个超微电极的半径为10μm。通过自组装方法在UMEA上修饰了GN-NH2和GN-COOH。与GN-NH2修饰的UMEA相比，GN-COOH修饰的UMEA对DO表现出更好的电化学还原性能，这归因于其更好的分散性和更多的活性位点。UMEA上的GN-COOH被电还原为还原型GN-COOH（rGN-COOH），以提高导电性和催化性能。最后，将钯纳米颗粒/rGN-COOH复合材料集成到DO微传感器中用于DO的检测。
