Room Temperature Ionic Liquid-Gated Carbon Nanotube FETs for Stable Hydrogen Sensing at Elevated Temperatures.

ABSTRACT: A novel hydrogen sensor, harnessing the synergy of room temperature ionic liquid (RTIL) and carbon nanotube field-effect transistors (CNT FETs), is proposed to improve the stability and long-term reliability of gas sensors. Utilizing RTIL as an electrolyte gate dielectric enhances sensitivity and markedly improves stability under elevated temperatures and harsh environmental conditions. The sensor maintains a low subthreshold slope (SS ≈ 100 mV/dec) and a stable on/off ratio (>10⁴) after long-term operation at 80°C. At 1000 ppm H₂, it exhibits a strong response of 86%, with rapid response/recovery times of 76/230 s. Selectivity measurements show negligible responses to 10 ppm NO₂, NH₃, and H₂S (<16%), indicating good anti-interf

SUBMITTER: Liu Y 

PROVIDER: S-EPMC12224109 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature