Fused and unzipped carbon nanotubes, electrochemically treated, for selective determination of dopamine and serotonin
Glassy carbon electrodes (GC) were modified with multiwalled carbon nanotubes (MWCNT/GC) and electrochemically treated first by applying an oxidation potential and then a reduction potential. The resulting electrodes were characterized via scanning electron microscopy, Raman spectroscopy, energy dis...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00134686_v283_n_p338_Bonetto |
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todo:paper_00134686_v283_n_p338_Bonetto2023-10-03T14:10:54Z Fused and unzipped carbon nanotubes, electrochemically treated, for selective determination of dopamine and serotonin Bonetto, M.C. Muñoz, F.F. Diz, V.E. Sacco, N.J. Cortón, E. Dopamine Electrochemical treatment Hybrid film Multiwalled carbon nanotubes Serotonin Amines Ascorbic acid Chemical detection Cyclic voltammetry Electrochemical impedance spectroscopy Energy dispersive spectroscopy Glass membrane electrodes Neurophysiology Oxidation Scanning electron microscopy Yarn Dopamine Electrochemical determination Electrochemical techniques Electrochemical treatments Glassy carbon electrodes Hybrid film Selective determination Serotonin Multiwalled carbon nanotubes (MWCN) Glassy carbon electrodes (GC) were modified with multiwalled carbon nanotubes (MWCNT/GC) and electrochemically treated first by applying an oxidation potential and then a reduction potential. The resulting electrodes were characterized via scanning electron microscopy, Raman spectroscopy, energy dispersive spectroscopy, and electrochemical techniques, particularly cyclic voltammetry using the redox probes Fe(CN)6 3− /4- and Ru(NH3)2+/3+ and electrochemical impedance spectroscopy using Fe(CN)6 3− /4-. These modified electrodes showed an electrochemical determination selective for dopamine (DA) and serotonin (5HT) in the presence of ascorbic acid (AA) and uric acid (UA), simultaneously measured, with a high reproducibility (an RSD of 1.7% for DA and 1.6% for 5HT) and a limit of detection (LOD) of 235 nmol L−1 for DA and 460 nmol L−1 for 5HT. The GC electrodes modified with oxidized MWCNT, subsequently reduced, showed higher selectivity towards the oxidation of DA and 5HT compared with GC bare electrodes or modified with MWCNT or oxidized MWCNT. © 2018 Elsevier Ltd JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00134686_v283_n_p338_Bonetto |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Dopamine Electrochemical treatment Hybrid film Multiwalled carbon nanotubes Serotonin Amines Ascorbic acid Chemical detection Cyclic voltammetry Electrochemical impedance spectroscopy Energy dispersive spectroscopy Glass membrane electrodes Neurophysiology Oxidation Scanning electron microscopy Yarn Dopamine Electrochemical determination Electrochemical techniques Electrochemical treatments Glassy carbon electrodes Hybrid film Selective determination Serotonin Multiwalled carbon nanotubes (MWCN) |
| spellingShingle |
Dopamine Electrochemical treatment Hybrid film Multiwalled carbon nanotubes Serotonin Amines Ascorbic acid Chemical detection Cyclic voltammetry Electrochemical impedance spectroscopy Energy dispersive spectroscopy Glass membrane electrodes Neurophysiology Oxidation Scanning electron microscopy Yarn Dopamine Electrochemical determination Electrochemical techniques Electrochemical treatments Glassy carbon electrodes Hybrid film Selective determination Serotonin Multiwalled carbon nanotubes (MWCN) Bonetto, M.C. Muñoz, F.F. Diz, V.E. Sacco, N.J. Cortón, E. Fused and unzipped carbon nanotubes, electrochemically treated, for selective determination of dopamine and serotonin |
| topic_facet |
Dopamine Electrochemical treatment Hybrid film Multiwalled carbon nanotubes Serotonin Amines Ascorbic acid Chemical detection Cyclic voltammetry Electrochemical impedance spectroscopy Energy dispersive spectroscopy Glass membrane electrodes Neurophysiology Oxidation Scanning electron microscopy Yarn Dopamine Electrochemical determination Electrochemical techniques Electrochemical treatments Glassy carbon electrodes Hybrid film Selective determination Serotonin Multiwalled carbon nanotubes (MWCN) |
| description |
Glassy carbon electrodes (GC) were modified with multiwalled carbon nanotubes (MWCNT/GC) and electrochemically treated first by applying an oxidation potential and then a reduction potential. The resulting electrodes were characterized via scanning electron microscopy, Raman spectroscopy, energy dispersive spectroscopy, and electrochemical techniques, particularly cyclic voltammetry using the redox probes Fe(CN)6 3− /4- and Ru(NH3)2+/3+ and electrochemical impedance spectroscopy using Fe(CN)6 3− /4-. These modified electrodes showed an electrochemical determination selective for dopamine (DA) and serotonin (5HT) in the presence of ascorbic acid (AA) and uric acid (UA), simultaneously measured, with a high reproducibility (an RSD of 1.7% for DA and 1.6% for 5HT) and a limit of detection (LOD) of 235 nmol L−1 for DA and 460 nmol L−1 for 5HT. The GC electrodes modified with oxidized MWCNT, subsequently reduced, showed higher selectivity towards the oxidation of DA and 5HT compared with GC bare electrodes or modified with MWCNT or oxidized MWCNT. © 2018 Elsevier Ltd |
| format |
JOUR |
| author |
Bonetto, M.C. Muñoz, F.F. Diz, V.E. Sacco, N.J. Cortón, E. |
| author_facet |
Bonetto, M.C. Muñoz, F.F. Diz, V.E. Sacco, N.J. Cortón, E. |
| author_sort |
Bonetto, M.C. |
| title |
Fused and unzipped carbon nanotubes, electrochemically treated, for selective determination of dopamine and serotonin |
| title_short |
Fused and unzipped carbon nanotubes, electrochemically treated, for selective determination of dopamine and serotonin |
| title_full |
Fused and unzipped carbon nanotubes, electrochemically treated, for selective determination of dopamine and serotonin |
| title_fullStr |
Fused and unzipped carbon nanotubes, electrochemically treated, for selective determination of dopamine and serotonin |
| title_full_unstemmed |
Fused and unzipped carbon nanotubes, electrochemically treated, for selective determination of dopamine and serotonin |
| title_sort |
fused and unzipped carbon nanotubes, electrochemically treated, for selective determination of dopamine and serotonin |
| url |
http://hdl.handle.net/20.500.12110/paper_00134686_v283_n_p338_Bonetto |
| work_keys_str_mv |
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1807317395087294464 |