Mo-CHS-15 - Tuning Selectivity of Electrochemical Sensors through Polymer Modifications
- Event
- EUROSENSORS 2026
2026-09-06 - 2026-09-09
Zurich - Band
- Poster
- Chapter
- Chemical Sensors
- Author(s)
- I. C. Weber - Chalmers University of Technology,Göteborg (Sweden), Y. Zosso, D. Uruchurtu Patino, L. Rijns, A. Düsselberg, Z. Bao - Stanford University,Stanford (USA)
- Pages
- 418 - 419
- DOI
- 10.5162/eurosensors2026/Mo-CHS-15
- ISBN
- 978-3-910600-12-6
- Price
- free
Abstract
Electrochemical sensors are highly promising for emerging applications, including health and environmental monitoring. Yet, a key bottleneck of today's sensors is limited selectivity. While electrode material development can enhance sensor performance, it is often insufficient to achieve the desired selectivity. Here, we introduce a different approach: modifying electrode surfaces with neutral polymeric coatings. Specifically, we demonstrate that poly(4-vinylpyridine) (P4VP) coatings deposited on glassy carbon electrodes systematically shift the oxidation potentials of ascorbic acid (AA) and serotonin (5-HT), thereby separating their oxidation peaks and enabling simultaneous detection in mixture. Importantly, we show that this concept is not limited to this specific example, but can be expanded to varying polymers, additional biomarkers (i.e., estradiol and melatonin), and other carbon electrode materials. Overall, this work demonstrates an alternative strategy to controlling the apparent oxidation potential and selectivity of electrochemical sensors, promising for next-generation sensing applications.