Carbon-Based FET-Type Gas Sensor for the Detection of ppb-Level Benzene at Room Temperature DOI Creative Commons
Risheng Cao, Zhengyu Lü, Jinyong Hu

et al.

Chemosensors, Journal Year: 2024, Volume and Issue: 12(9), P. 179 - 179

Published: Sept. 4, 2024

Benzene, as a typical toxic gas and carcinogen, is an important detection object in the field of environmental monitoring. However, it remains challenging for conventional resistance-type sensor to effectively detect low-concentration (ppb-level) benzene molecules, owing their insufficient reaction activation energy, especially when operating at room temperature. Herein, field-effect transistor (FET)-type using carbon nanotubes channel material proposed efficient trace benzene, where (CNTs) with high semiconductor purity act main material, ZnO/WS2 nanocomposites serve gate sensitive material. On basis remarkable amplification effect CNTs-based FET, manifests desirable ability limit low 500 ppb even working temperature, also exhibits fast response speed (90 s), consistency deviation less than 5%, long-term stability up 30 days. Furthermore, utilizing Tenax TA screening unit, as-proposed can achieve feasible selective benzene. These experimental results demonstrate that strategy here provide significant guidance development high-performance sensors

Language: Английский

Amplifying Electron-Donor Signal of the “Water Gate” Enabled Low Detection Ability of a Field-Effect Transistor-Based Humidity Sensor DOI
Bohao Liu, Qingqing Chen, Jinyong Hu

et al.

Analytical Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 28, 2025

Low humidity detection down to the parts per million level is urgently demanded in various industrial applications. The hardly detected tiny electrical signal variations caused by a very small amount of water adsorption are one intrinsic reasons that restrain limit sensors. Herein, carbon-based field-effect transistor (FET) sensor utilizing adsorbed as dual function sensing gate and analyte was proposed. Owing electron donor property "water gate" can serve negative voltage exerted on dielectric layer, conductivity FET's channel be significantly modulated, therefore realizing amplification. proposed presents lower than 1% RH. Besides, fabricated sensors show good batch consistency (response deviation 0.5%), repeatability, long-term stability, acceptable hysteresis (6.3% relative (RH)) detection. We hope our work offer novel strategy for application integration low from device aspect rather materials synthesis.

Language: Английский

Citations

0
Carbon-Based FET-Type Gas Sensor for the Detection of ppb-Level Benzene at Room Temperature DOI Creative Commons
Risheng Cao, Zhengyu Lü, Jinyong Hu

et al.

Chemosensors, Journal Year: 2024, Volume and Issue: 12(9), P. 179 - 179

Published: Sept. 4, 2024

Benzene, as a typical toxic gas and carcinogen, is an important detection object in the field of environmental monitoring. However, it remains challenging for conventional resistance-type sensor to effectively detect low-concentration (ppb-level) benzene molecules, owing their insufficient reaction activation energy, especially when operating at room temperature. Herein, field-effect transistor (FET)-type using carbon nanotubes channel material proposed efficient trace benzene, where (CNTs) with high semiconductor purity act main material, ZnO/WS2 nanocomposites serve gate sensitive material. On basis remarkable amplification effect CNTs-based FET, manifests desirable ability limit low 500 ppb even working temperature, also exhibits fast response speed (90 s), consistency deviation less than 5%, long-term stability up 30 days. Furthermore, utilizing Tenax TA screening unit, as-proposed can achieve feasible selective benzene. These experimental results demonstrate that strategy here provide significant guidance development high-performance sensors

Language: Английский

Citations

2