Electrochemical serotonin monitoring of poly (ethylenedioxythiophene):poly(sodium 4-styrenesulfonate)-modified fluorine-doped tin oxide by predeposition of self-assembled 4-pyridylporphyrin
- Authors
- Song, Min-Jung; Kim, Sangsig; Min, Nam Ki; Jin, Joon-Hyung
- Issue Date
- 15-2월-2014
- Publisher
- ELSEVIER ADVANCED TECHNOLOGY
- Keywords
- Binary self-assembled monolayer; Cyclic voltammetry; Electrochemical impedance spectroscopy; Serotonin; PEDOT:PSS 5,10,15,20-tetrakis(4-pyridyl)-21H 23H-porphyrin
- Citation
- BIOSENSORS & BIOELECTRONICS, v.52, pp.411 - 416
- Indexed
- SCIE
SCOPUS
- Journal Title
- BIOSENSORS & BIOELECTRONICS
- Volume
- 52
- Start Page
- 411
- End Page
- 416
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/99277
- DOI
- 10.1016/j.bios.2013.08.040
- ISSN
- 0956-5663
- Abstract
- A 5,10,15,20-tetrakis(4-pyridyl)-21H,23H-porphyrin (TPyP)-modified self-assembled functional layer was prepared on a fluorine-doped tin oxide (FTO) substrate. We employed a bifunctional molecule, 3-iodopropionate (3IP), to covalently bind TPyP to the FTO substrate. The 3IP-monolayered FTO and the TPyP-3IP-bilayered FTO electrodes were characterized by cyclic voltammetry, electrochemical impedance spectroscopy, and Fourier transform-infrared spectroscopy. Compared to conventional electropolymerized poly(ethylenedioxythiophene):poly(sodium 4-styrenesulfonate) (PEDOT:PSS) film on bare FTO, the PEDOT:PSS film on the TPyP-31P-bilayered FTO showed better sensitivity and selectivity in monitoring serotonin in the presence of high concentrations of interfering agents such as ascorbic acid, urea, D-(+)-glucose, epinephrine, and L-3,4-dihydroxyphenylalanine. Both PEDOT:PSS films on the bare FTO and the TPyP-31P-bilayered FTO showed electrocatalytic effects in serotonin detection, and only the TPyP-3IP-based PEDOT:PSS film acted as a pH resistant buffer layer in the selective detection of serotonin. (C) 2013 Published by Elsevier B.V.
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Collections - College of Engineering > School of Electrical Engineering > 1. Journal Articles
- College of Science and Technology > Department of Electro-Mechanical Systems Engineering > 1. Journal Articles
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