6.1.2 - Polymorph-Dependent Electronic Transduction in WO3 during Molecular Sensing through Experiment and DFT
- Event
- EUROSENSORS 2026
2026-09-06 - 2026-09-09
Zurich - Band
- Lectures
- Chapter
- Chemical Sensors
- Author(s)
- M. Yin, K. Suzuki, Y. Chen - Tohoku University,Sendai (Japan), M. D’Andria, S. Neuhauser, A. T. Güntner, V. G. Mavrantzas - ETH Zurich,Zurich (Switzerland), V. G. Mavrantzas - University of Patras,Patras (Greece)
- Pages
- 188 - 189
- DOI
- 10.5162/eurosensors2026/6.1.2
- ISBN
- 978-3-910600-12-6
- Price
- free
Abstract
Tungsten trioxide (WO 3 ) polymorphs have been widely studied for molecular sensing, yet the origin of their different chemoresistive behaviors remains unclear. Here, structural and spectroscopic characterization, in situ DRIFTS, and density functional theory (DFT) simulations reveal that both γ- and ε-WO ₃ exhibit similar surface-level activation of acetone, whereas only ε-WO 3 stabilizes analyte-induced electronic states derived from W(5d) orbitals. These subsurface electronic rearrangements may explain its superior transduction efficiency despite similar receptor chemistry. Our findings provide a new framework for rational transducer design rooted in intrinsic electronic structure.