Cyclic voltammetry and electrical impedance spectroscopy of electrodes modified with PEDOT:PSS-reduced graphene oxide composite
Cyclic voltammetry (CV) and electrical impedance spectroscopy (EIS) are electrochemical techniques to characterize reversibility of electron transfer and impedance at the electrode-solution interface, respectively. Reduced graphene oxide (rGO) and conductive polymer PEDOT:PSS are often used to enhan...
| Main Authors: | , , , |
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| Format: | Book Chapter |
| Language: | English |
| Published: |
Intech Open
2018
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/68445/ http://irep.iium.edu.my/68445/ http://irep.iium.edu.my/68445/ http://irep.iium.edu.my/68445/1/Cyclic%20Voltammetry%20and%20Electrical%20Impedance%20Spectroscopy%20of%20Electrodes%20Modified%20with%20PEDOTPSS-Reduced%20Graphene%20Oxide%20Composite%202018.pdf |
| Summary: | Cyclic voltammetry (CV) and electrical impedance spectroscopy (EIS) are electrochemical techniques to characterize reversibility of electron transfer and impedance at the electrode-solution interface, respectively. Reduced graphene oxide (rGO) and conductive polymer PEDOT:PSS are often used to enhance electron transfer at electrode surface. This chapter provides a step-by-step methodology of CV and EIS conducted on screen-printed carbon electrode (SPCE) modified with rGO-PEDOT:PSS and brief discussion on the CV and EIS results. The CV of rGO-PEDOT:PSS shows a reversible electron transfer in comparison to SPCE modified with PEDOT:PSS. For EIS, rGO-PEDOT:PSS was found to reduce the Warburg impedance, suggesting enhanced electrode conductivity. These results suggest that rGO-PEDOT:PSS is a suitable material for biosensing purpose. |
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