About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Surface Engineering VIII
|
| Presentation Title |
Fabrication of a Highly Stable and Sensitive Iridium Oxide Nano-Needle pH Sensor Using Electrochemical Deposition |
| Author(s) |
Kyu Hwan Lee, Min-Yeong Kim |
| On-Site Speaker (Planned) |
Kyu Hwan Lee |
| Abstract Scope |
Iridium Oxide Nano-Needles (IrOx NNs) were synthesized using a simple electrochemical deposition method and integrated onto a Screen-Printed Carbon Electrode (SPCE) to develop a novel pH sensor. The nano-needle structure was controlled by adjusting the annealing temperature, with optimal morphology achieved at 650 °C. This unique structure enhanced the surface area and electron transfer, leading to improved sensor performance. The fabricated sensor, using a two-electrode system with an Ag/AgCl reference, showed a near-Nernstian response of 58.27 mV/pH over a wide pH range (2–12) at 25 °C. Surface chemistry was analyzed by XPS, and the active surface area was evaluated electrochemically. The sensor demonstrated excellent sensitivity, stability, response time, reproducibility, and selectivity, highlighting the strong potential of IrOx NNs for advanced pH sensing applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Surface Modification and Coatings, Thin Films and Interfaces, |