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Updated: Jan 26, 2026

Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection
Published on: February 1, 2022
Highly sensitive and selective sulfite sensors based on solution-gated graphene transistors with multi-walled carbon
Rongrong Wang1, Yu Mao1, Hao Qu2
1School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China.
Abstract:
Due to the potential toxicity of sulfite as widely used food additive, there is urgent need for the development of low-cost, rapid and convenient sensors for sulfite detection. Toward this end, highly sensitive and selective sulfite sensors based on solution gated graphene transistors (SGGTs) was innovatively developed. The performance of the device was significantly improved through the functionalization of the gate electrode with multi-walled carbon nanotubes (MWCNTs). We found that the MWCNT modified SGGT sensor showed an ultra-low detection limit of 30 nM toward sulfite. In addition, we also demonstrated that the SGGT-based sulfite sensor was capable of detecting sulfite content in practical liquor samples with high recovery rate. Considering its low-cost and easy-fabricating features, we believe that the SGGT-based sensor with appropriate functionalization may be applied as a highly potential platform for ultra-sensitive detection of a broad range of important analytes in practical samples for food safety purpose.
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