Abstract
The graphene quantum dots (GQDs) were synthesized by a convenient method and immobilized to glassy carbon electrode (GCE) through covalent self-assembled method. The GQDs and the obtained (GQDs–NHCH2CH2NH)/GCE were characterized by transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy and atomic force microscopy (AFM), etc. Its electrochemical property of the (GQDs–NHCH2CH2NH)/GCE was explored carefully by electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and differential pulse voltammetry (DPV). It was demonstrated that the modified electrode presents good electrical conductivity and has favorable electrochemical response to dopamine (DA). The (GQDs–NHCH2CH2NH)/GCE displays a linear range from 1 to 150μM and a detection limit of 0.115μM (S/N=3) to DA, which illustrates that the modified electrode is highly sensitive towards the determination of DA. The (GQDs–NHCH2CH2NH)/GCE also possesses good anti-interference capability and well stability. Furthermore, the sensor displays satisfactory results in real samples determination which demonstrate its great potential in practical applications.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
