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Sensors 2015, 15(1), 382-393; doi:10.3390/s150100382

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

1,* , 1,†
,
1,†
,
1,†
,
1,†
,
2,†
and
1,†
1
State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China
2
National Key Laboratory of Microwave Imaging Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 29 October 2014 / Accepted: 19 December 2014 / Published: 26 December 2014
(This article belongs to the Special Issue Modern Technologies for Sensing Pollution in Air, Water, and Soil)
View Full-Text   |   Download PDF [1176 KB, uploaded 26 December 2014]   |  

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. View Full-Text
Keywords: graphene; ultramicroelectrode array; dissolved oxygen; microsensor; MEMS graphene; ultramicroelectrode array; dissolved oxygen; microsensor; MEMS
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Wang, J.; Bian, C.; Tong, J.; Sun, J.; Li, Y.; Hong, W.; Xia, S. Modification of Graphene on Ultramicroelectrode Array and Its Application in Detection of Dissolved Oxygen. Sensors 2015, 15, 382-393.

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