High–sensitivity pH sensors based on W-doped VO x thin films prepared by chemical solution deposition toward biosensing applications
Abstract
We report the fabrication and evaluation of VOx and W-doped VOx thin films via the chemical solution deposition method, with a focus on their pH response characteristics. VOx and W-doped VOx thin films were prepared from precursor solutions under different conditions. The deposited films were employed as extended electrodes in extended-gate field-effect transistor (EGFET)-type pH sensors. Their pH response and sensitivity were evaluated over a range of neutral to basic conditions. Although the single-phase VOx film exhibited instability under alkaline conditions, the W-doped VOx film demonstrated significantly enhanced stability and achieved highly sensitive pH responses that exceeded the Nernst limit.
Fields of Study & Subjects
Analytical Chemistry and Sensors
Gas Sensing Nanomaterials and Sensors
Transition Metal Oxide Nanomaterials
Publication details
- Journal / source
- Molecular Crystals and Liquid Crystals
- Publisher
- Informa UK Limited
- Volume
- 770
- Issue
- 6
- Pages
- 837–844
- Publication date
- 26 January 2026
- Language
- EN