Transfer-free CVD graphene for highly sensitive glucose sensors. (15th January 2020)

• Record Type: Journal Article
• Authors: Wei, Shijing; Hao, Yabin; Ying, Zhe; Xu, Chuan; Wei, Qinwei; Xue, Sen; Cheng, Hui-Ming; Ren, Wencai; Ma, Lai-Peng; Zeng, You
• Is Part Of: Journal of materials science & technology. Volume 37(2020)
• Page Start: 71
• Page End: 76
• Publication Date: 2020-01-15
• Subjects: Graphene -- Chemical vapor deposition -- Transfer-free -- Oxygen-plasma treatment -- Glucose sensor; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2019.07.039
• Languages: English
• ISSNs: 1005-0302

Abstract

Abstract: Chemical vapor deposition (CVD) graphene film is a promising electrode-modifying material for fabricating high-performance glucose sensor due to its high electrical conductivity and two-dimensional structure over large area. However, the use of typical metal-based CVD graphene suffers from the residue contamination of polymer transfer-support and heavy metal ions. In this work, we directly grew few-layer graphene on the SiO2 /Si substrate without transfer process and then fabricated graphene-based glucose sensors by sequentially immobilizing glucose oxidase and depositing Nafion layer on its surface that was functionalized by oxygen-plasma treatment. Our transfer- and metal-free process shows distinct advantage over the common metal-CVD method in improving the electrochemical performance by eliminating the contamination of transfer-residue. Thus-obtained glucose sensor shows a high sensitivity (16.16 μA mM −1 cm -2 ) with a detection limit of 124.19 μM. This method is simple and promising for the development of highly sensitive glucose sensors.