Study of electropolymerized PEDOT:PSS transducers for application as electrochemical sensors in aqueous media

• Main Authors: Benoudjit, Abdel Mohsen, Bader, Mamoun M., Wan Salim, Wan Wardatul Amani
• Format: Article
• Language: English; English
• Published: Elsevier BV 2018
• Subjects: Q Science (General); T Technology (General); TA164 Bioengineering; TA170 Environmental engineering
• Online Access: http://irep.iium.edu.my/61508/1/61508_Study%20of%20electropolymerized%20PEDOT_article.pdf; http://irep.iium.edu.my/61508/7/61508_Study%20of%20electropolymerized%20PEDOT_SCOPUS.pdf; http://irep.iium.edu.my/61508/; https://reader.elsevier.com/reader/sd/F6AE1BF784CF6B1BD87EDE69E48295DC0BDD7C9C864C608E1BD95521C2FB30CF3379241C84D0D7D8905724E8C0FA83DF
• Institution: Universiti Islam Antarabangsa Malaysia

Electropolymerized poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) onto screen-printed platinum electrodes was tested for stable charge/discharge cycle using cyclic voltammetry (CV) in aqueous media and its adhesion to the electrode surface was also examined. Electropolymerized PEDOT:PSS maintained most of its initial CV behavior after water-flow test (flow rate = 1 ml/s), whereas drop-cast PEDOT:PSS did not, indicating better adhesion and retention of the polymer's mechanical and electrical properties. Field emission scanning electron microscopy (FESEM) and energy-dispersive X-ray spectroscopy (EDS) suggest that film structure influence the stability of the redox current measurements. These results prove that careful electropolymerization techniques for synthesizing the PEDOT:PSS transducer are worth pursuing in developing robust electrochemical sensors suitable for continuous use in aqueous media. Developing such transducers is important for developing electrochemical sensors for biomedical and/or environmental monitoring where aqueous flow usually occurs on electrode surfaces.