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Updated: Apr 10, 2026
Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection
Published on: February 1, 2022
Highly sensitive Fe₃O₄ nanobeads/graphene-based molecularly imprinted electrochemical sensor for 17β-estradiol in
Ying Li1, Xueru Zhao2, Ping Li2
1State Key Laboratory of Hollow Fiber Membrane Materials and Processes, College of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300016, China; School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
Abstract:
A novel molecularly imprinted electrochemical sensor based on Fe3O4 nanobeads immobilized on graphene (Fe3O4-MIP@RGO) has been developed for detecting 17β-estradiol (17β-E2) in water using reversible addition fragmentation chain transfer (RAFT) polymerization technique. 17β-E2 can be detected by this electrochemical sensor through the response current change before and after binding 17β-E2. The Fe3O4-MIP@RGO-based sensor amplifies the response current in differential pulse voltammetry measurement, allowing the detection limit reaching 0.819 nM in a wide linear range from 0.05 to 10 μM. Moreover, Fe3O4-MIP@RGO-based sensor exhibits high selectivity and sensitivity towards 17β-E2. This MIP electrochemical sensor has a promising potential in the detection of 17β-E2 in water.
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