期刊
FLATCHEM
卷 24, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.flatc.2020.100187
关键词
Molybdenum disulphide nanosheets; Electrochemical sensors; Dopamine; Uric acid; Tyrosine
资金
- Joint Bilateral Agreement CNR/The Czech Academy of Sciences (CAS), Triennial Program
Two-dimensional molybdenum disulphide nanosheets (2D-MoS2) were prepared by liquid-phase exfoliation and used to modify screen-printed carbon electrodes (SPCE), in order to develop an electrochemical sensor for the simultaneous determination of dopamine (DA) and tyrosine (Tyr) in presence of uric acid (UA). To demonstrate the layered morphology, the synthesized molybdenum disulphide nanostructures, have been characterized by Raman and SEM in both liquid dispersion and after deposition on SPCE. The performances of the 2D-MoS2-SPCE electrode have been tested and optimized in terms of sensitivity, reaching high sensitivity values of 1044 mu A mM(-1) cm(-2) for DA and 321 mu A mM(-1) cm(-2) for Tyr, selectivity against UA and high stability. The simultaneous detection of these biomolecules is the first study so far reported with the use of 2D-MoS2-based sensors. The promising characteristics of the developed electrodes suggest 2D-MoS2 as a versatile, low cost and easy to produce material for the next generation of electrochemical sensors of a variety of important biomolecules.
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