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J Colloid Interface Sci. 2017 Nov 15;506:379-385. doi: 10.1016/j.jcis.2017.07.061. Epub 2017 Jul 18.

High performance electrochemical glucose sensor based on three-dimensional MoS2/graphene aerogel.

Author information

1
Department of Chemical & Biomolecular Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
2
Department of Materials Science and Engineering and Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, United States.
3
Department of Chemical Engineering, Kangwon National University, Samcheok 25913, Republic of Korea.
4
Nano-Bio Application Team, National Nanofab Center, Daejeon 34141, Republic of Korea.
5
Department of Materials Science and Engineering and Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, United States. Electronic address: bgchoi@kangwon.ac.kr.
6
Department of Chemical & Biomolecular Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea. Electronic address: DoHyun.Kim@kaist.ac.kr.

Abstract

Two-dimensional (2D) nanosheets have been extensively explored as electrode materials for the development of high-performance electrochemical biosensors due to their unique structural characteristics. Nevertheless, 2D nanosheets suffer from sheet aggregation issues limiting the electrical conductivity of layered metal sulfides or hydroxides. Here, we report high-performance glucose biosensors based on a three-dimensional (3D) aerogel composed of interconnected 2D MoS2 and graphene sheet. 3D MoS2/graphene aerogel (MGA) provides a large surface area for the effective immobilization of enzymes, and continuous framework of electrically conductive graphene sheets. Flow-injection amperometric evaluation of the glucose biosensor using a 3D MGA electrode exhibits a rapid response (∼4s), a linear detection range from 2 to 20mM, a sensitivity of 3.36μA/mM, and a low limit of detection of 0.29mM. Moreover, the interference response from oxidizable species, such as ascorbic acid, uric acid and dopamine is negligible at an operating potential of -0.45V.

KEYWORDS:

2D nanosheets; 3D gel; Glucose sensor; Graphene; Hydrothermal; Molybdenum disulphide; Self-assembly

PMID:
28750240
DOI:
10.1016/j.jcis.2017.07.061
[Indexed for MEDLINE]

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