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- Title
Electropolymerized Diphenylamine on Functionalized Multiwalled Carbon Nanotube Composite Film and Its Application to Develop a Multifunctional Biosensor.
- Authors
Tsai, Tsung‐Hsuan; Ku, Shu‐Hao; Chen, Shen‐Ming; Lou, Bih‐Show; Ali, M. Ajmal; Al‐Hemaid, Fahad M. A.
- Abstract
Diphenylamine (DPA) monomers have been electropolymerized on the amino-functionalized multiwalled carbon nanotube (AFCNT) composite film modified glassy carbon electrode (GCE) by cyclic voltammetry (CV). The surface morphology of PDPA-AFCNT was studied using field-emission scanning electron microscopy (FE-SEM). The interfacial electron transfer phenomenon at the modified electrode was studied using electrochemical impedance spectroscopy (EIS). The PDPA-AFCNT/GCE represented a multifunctional sensor and showed good electrocatalytic behavior towards the oxidation of catechol and the reduction of hydrogen peroxide. Rotating-disk electrode technique was applied to detect catechol with a sensitivity of 1360 µA mM−1 cm−2 and a detection limit of 0.01 mM. Amperometric determination of hydrogen peroxide at the PDPA-AFCNT film modified electrode results in a linear range from 10 to 800 µM, a sensitivity of 487.1 µA mM−1 cm−2 and detection limit of 1 µM. These results show that the nano-composite film modified electrode can be utilized to develop a multifunctional sensor.
- Subjects
ELECTROPOLYMERIZATION; DIPHENYLAMINE; CARBON nanotubes; ANTHOLOGY films; BIOSENSORS; CYCLIC voltammetry
- Publication
Electroanalysis, 2014, Vol 26, Issue 2, p399
- ISSN
1040-0397
- Publication type
Article
- DOI
10.1002/elan.201300495