Photo-Electrochemical Sensing of Dopamine by a Novel Porous TiO2 Array-Modified Screen-Printed Ti Electrode
In this paper, the development of a nanoporous TiO2 array-modified Ti electrode for photo-electrochemical (PEC) sensing of dopamine (DA) is reported. A porous TiO2 array-modified electrode was fabricated from the controlled anodic oxidation of a Ti working electrode of commercial screen-printed elec...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-10-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/18/10/3566 |
| _version_ | 1798005719148003328 |
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| author | Francesco Tavella Claudio Ampelli Salvatore Gianluca Leonardi Giovanni Neri |
| author_facet | Francesco Tavella Claudio Ampelli Salvatore Gianluca Leonardi Giovanni Neri |
| author_sort | Francesco Tavella |
| collection | DOAJ |
| description | In this paper, the development of a nanoporous TiO2 array-modified Ti electrode for photo-electrochemical (PEC) sensing of dopamine (DA) is reported. A porous TiO2 array-modified electrode was fabricated from the controlled anodic oxidation of a Ti working electrode of commercial screen-printed electrodes (SPE). The anodization process and the related morphological and microstructural transformation of the bare Ti electrode into a TiO2/Ti electrode was followed by scanning electron microscopy (SEM) and UV-visible reflectance spectroscopy (DR-UV-Vis). The modified electrode was irradiated with a low-power (120 mW) UV-Vis LED lamp (λ = 400 nm) and showed good performance for the detection of DA with a large linear response range, a sensitivity of 462 nA mM−1 cm−2, and a limit of detection of 20 µM. Moreover, it showed higher photocurrents in the presence of DA in comparison to some foreign species such as ascorbic acid, uric acid, glucose, K+, Na+, and Cl−. Thus, this proposed low-cost photo-electrochemical sensor, with the advantage of very simple fabrication, demonstrates potential applications for the determination of dopamine in real samples. |
| first_indexed | 2024-04-11T12:43:33Z |
| format | Article |
| id | doaj.art-dabe046a0c0d4e2996f741b11c0c5046 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T12:43:33Z |
| publishDate | 2018-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-dabe046a0c0d4e2996f741b11c0c50462022-12-22T04:23:25ZengMDPI AGSensors1424-82202018-10-011810356610.3390/s18103566s18103566Photo-Electrochemical Sensing of Dopamine by a Novel Porous TiO2 Array-Modified Screen-Printed Ti ElectrodeFrancesco Tavella0Claudio Ampelli1Salvatore Gianluca Leonardi2Giovanni Neri3Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, I-98166 Messina, ItalyDepartment of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, I-98166 Messina, ItalyDepartment of Engineering, University of Messina, I-98166 Messina, ItalyDepartment of Engineering, University of Messina, I-98166 Messina, ItalyIn this paper, the development of a nanoporous TiO2 array-modified Ti electrode for photo-electrochemical (PEC) sensing of dopamine (DA) is reported. A porous TiO2 array-modified electrode was fabricated from the controlled anodic oxidation of a Ti working electrode of commercial screen-printed electrodes (SPE). The anodization process and the related morphological and microstructural transformation of the bare Ti electrode into a TiO2/Ti electrode was followed by scanning electron microscopy (SEM) and UV-visible reflectance spectroscopy (DR-UV-Vis). The modified electrode was irradiated with a low-power (120 mW) UV-Vis LED lamp (λ = 400 nm) and showed good performance for the detection of DA with a large linear response range, a sensitivity of 462 nA mM−1 cm−2, and a limit of detection of 20 µM. Moreover, it showed higher photocurrents in the presence of DA in comparison to some foreign species such as ascorbic acid, uric acid, glucose, K+, Na+, and Cl−. Thus, this proposed low-cost photo-electrochemical sensor, with the advantage of very simple fabrication, demonstrates potential applications for the determination of dopamine in real samples.http://www.mdpi.com/1424-8220/18/10/3566TiO2dopaminephoto-electrochemical sensors |
| spellingShingle | Francesco Tavella Claudio Ampelli Salvatore Gianluca Leonardi Giovanni Neri Photo-Electrochemical Sensing of Dopamine by a Novel Porous TiO2 Array-Modified Screen-Printed Ti Electrode Sensors TiO2 dopamine photo-electrochemical sensors |
| title | Photo-Electrochemical Sensing of Dopamine by a Novel Porous TiO2 Array-Modified Screen-Printed Ti Electrode |
| title_full | Photo-Electrochemical Sensing of Dopamine by a Novel Porous TiO2 Array-Modified Screen-Printed Ti Electrode |
| title_fullStr | Photo-Electrochemical Sensing of Dopamine by a Novel Porous TiO2 Array-Modified Screen-Printed Ti Electrode |
| title_full_unstemmed | Photo-Electrochemical Sensing of Dopamine by a Novel Porous TiO2 Array-Modified Screen-Printed Ti Electrode |
| title_short | Photo-Electrochemical Sensing of Dopamine by a Novel Porous TiO2 Array-Modified Screen-Printed Ti Electrode |
| title_sort | photo electrochemical sensing of dopamine by a novel porous tio2 array modified screen printed ti electrode |
| topic | TiO2 dopamine photo-electrochemical sensors |
| url | http://www.mdpi.com/1424-8220/18/10/3566 |
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