Tailoring Electrochemical Properties of PEDOT‐Based Platinum Electrode via Controlled Polymerization in Simulated Physiological Conditions
Abstract Optimizing the polymerization parameters of poly(3,4‐ethylenedioxythiophene) (PEDOT) is vital for enhancing neural electrode performance. This study systematically investigated the effects of 3,4‐ethylenedioxythiophene (EDOT) monomer concentration, the concentrations of dopants, including s...
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Wiley-VCH
2025-07-01
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| Series: | Advanced Materials Interfaces |
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| Online Access: | https://doi.org/10.1002/admi.202500263 |
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| author | Mohammad Taghi Tourchi Moghadam Karolina Cysewska |
| author_facet | Mohammad Taghi Tourchi Moghadam Karolina Cysewska |
| author_sort | Mohammad Taghi Tourchi Moghadam |
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| description | Abstract Optimizing the polymerization parameters of poly(3,4‐ethylenedioxythiophene) (PEDOT) is vital for enhancing neural electrode performance. This study systematically investigated the effects of 3,4‐ethylenedioxythiophene (EDOT) monomer concentration, the concentrations of dopants, including sodium polystyrene sulfonate (NaPSS) and lithium perchlorate (LiClO₄), and solvent choice (water vs. acetonitrile) on the electrochemical and morphological properties of PEDOT coatings on platinum (Pt) electrodes. Electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and current‐injection limit (CIL) measurements are used to evaluate performance, while scanning electron microscopy with energy‐dispersive X‐ray spectroscopy (SEM‐EDX) characterizes surface morphology. Results show that 0.01 m EDOT led to more uniform films and lower impedance compared to higher concentrations (0.03 to 0.05 m). Among dopants, 2.5 mg mL⁻¹ NaPSS in water with 0.01 m EDOT achieved the lowest impedance (5 Ω cm2 at 1 kHz) and significantly improved charge storage capacity (CSC) and CIL, approximately six and five times greater, respectively, than bare Pt electrodes. Electrodes prepared with 0.1 m LiClO₄ in acetonitrile at EDOT concentrations (0.03 to 0.05 m) exhibited higher impedance than those using NaPSS. Optimized conditions, consisting of 0.01 m EDOT and 2.5 mg mL⁻¹ NaPSS in water, produced PEDOT film with the highest CSC and CIL values, while maintaining 94 and 96% of their impedance at 10 Hz and 1 kHz, respectively, over 24 h of continuous EIS cycling. |
| format | Article |
| id | doaj-art-d2099dbc96ae4b3eb51e3fbcf0f5cde6 |
| institution | Kabale University |
| issn | 2196-7350 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Wiley-VCH |
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| series | Advanced Materials Interfaces |
| spelling | doaj-art-d2099dbc96ae4b3eb51e3fbcf0f5cde62025-08-20T03:58:36ZengWiley-VCHAdvanced Materials Interfaces2196-73502025-07-011214n/an/a10.1002/admi.202500263Tailoring Electrochemical Properties of PEDOT‐Based Platinum Electrode via Controlled Polymerization in Simulated Physiological ConditionsMohammad Taghi Tourchi Moghadam0Karolina Cysewska1Faculty of Electronics Telecommunications and Informatics and Advanced Materials Centre Gdansk University of Technology ul. Narutowicza 11/12 Gdańsk 80–233 PolandFaculty of Electronics Telecommunications and Informatics and Advanced Materials Centre Gdansk University of Technology ul. Narutowicza 11/12 Gdańsk 80–233 PolandAbstract Optimizing the polymerization parameters of poly(3,4‐ethylenedioxythiophene) (PEDOT) is vital for enhancing neural electrode performance. This study systematically investigated the effects of 3,4‐ethylenedioxythiophene (EDOT) monomer concentration, the concentrations of dopants, including sodium polystyrene sulfonate (NaPSS) and lithium perchlorate (LiClO₄), and solvent choice (water vs. acetonitrile) on the electrochemical and morphological properties of PEDOT coatings on platinum (Pt) electrodes. Electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and current‐injection limit (CIL) measurements are used to evaluate performance, while scanning electron microscopy with energy‐dispersive X‐ray spectroscopy (SEM‐EDX) characterizes surface morphology. Results show that 0.01 m EDOT led to more uniform films and lower impedance compared to higher concentrations (0.03 to 0.05 m). Among dopants, 2.5 mg mL⁻¹ NaPSS in water with 0.01 m EDOT achieved the lowest impedance (5 Ω cm2 at 1 kHz) and significantly improved charge storage capacity (CSC) and CIL, approximately six and five times greater, respectively, than bare Pt electrodes. Electrodes prepared with 0.1 m LiClO₄ in acetonitrile at EDOT concentrations (0.03 to 0.05 m) exhibited higher impedance than those using NaPSS. Optimized conditions, consisting of 0.01 m EDOT and 2.5 mg mL⁻¹ NaPSS in water, produced PEDOT film with the highest CSC and CIL values, while maintaining 94 and 96% of their impedance at 10 Hz and 1 kHz, respectively, over 24 h of continuous EIS cycling.https://doi.org/10.1002/admi.202500263conductive polymerselectrical interface parameterselectrochemical polymerizationneural electrodePEDOT:PSS |
| spellingShingle | Mohammad Taghi Tourchi Moghadam Karolina Cysewska Tailoring Electrochemical Properties of PEDOT‐Based Platinum Electrode via Controlled Polymerization in Simulated Physiological Conditions Advanced Materials Interfaces conductive polymers electrical interface parameters electrochemical polymerization neural electrode PEDOT:PSS |
| title | Tailoring Electrochemical Properties of PEDOT‐Based Platinum Electrode via Controlled Polymerization in Simulated Physiological Conditions |
| title_full | Tailoring Electrochemical Properties of PEDOT‐Based Platinum Electrode via Controlled Polymerization in Simulated Physiological Conditions |
| title_fullStr | Tailoring Electrochemical Properties of PEDOT‐Based Platinum Electrode via Controlled Polymerization in Simulated Physiological Conditions |
| title_full_unstemmed | Tailoring Electrochemical Properties of PEDOT‐Based Platinum Electrode via Controlled Polymerization in Simulated Physiological Conditions |
| title_short | Tailoring Electrochemical Properties of PEDOT‐Based Platinum Electrode via Controlled Polymerization in Simulated Physiological Conditions |
| title_sort | tailoring electrochemical properties of pedot based platinum electrode via controlled polymerization in simulated physiological conditions |
| topic | conductive polymers electrical interface parameters electrochemical polymerization neural electrode PEDOT:PSS |
| url | https://doi.org/10.1002/admi.202500263 |
| work_keys_str_mv | AT mohammadtaghitourchimoghadam tailoringelectrochemicalpropertiesofpedotbasedplatinumelectrodeviacontrolledpolymerizationinsimulatedphysiologicalconditions AT karolinacysewska tailoringelectrochemicalpropertiesofpedotbasedplatinumelectrodeviacontrolledpolymerizationinsimulatedphysiologicalconditions |