Zhang Zeyu, Cheng Bolang, Zhang Yong
School of Physics and Optoelectronics, Xiangtan University, Xiangtan, 411105, P. R. China.
Hunan Institute of Advanced Sensing and Information Technology, Xiangtan University, Xiangtan, 411105, P. R. China.
Adv Sci (Weinh). 2025 May;12(19):e2500389. doi: 10.1002/advs.202500389. Epub 2025 Mar 24.
Ethylene (CH) is an important plant hormone, and its concentration can be used as an essential indicator of fruit quality. However, CH is a non-polar gas with a relatively stable structure, making it challenging to detect and desorb without heating or irradiation. Here, a pulsed electric field modulation mode for non-polar gas detection is proposed, which enables fast and complete recovery of sensors at room temperature. Compared to the nearly impossible desorption without electric field assistance, the recovery time for 9 ppm CH can be reduced to 78 s when the +60 V pulse gate voltage is applied, which is nearly equivalent to the recorded values under heating or irradiation (50 s under 250 °C). Most crucially, with the help of a gate-induced electric field, the sensor achieves complete desorption within 100 s. This work offers a new approach for fast non-polar gas detection at room temperature and on-chip integration of gas sensors.
乙烯（CH）是一种重要的植物激素，其浓度可作为果实品质的重要指标。然而，CH是一种结构相对稳定的非极性气体，在不加热或不进行辐照的情况下进行检测和解吸具有挑战性。在此，提出了一种用于非极性气体检测的脉冲电场调制模式，该模式可使传感器在室温下快速且完全恢复。与没有电场辅助时几乎不可能解吸的情况相比，当施加+60V脉冲栅极电压时，9ppm CH的恢复时间可缩短至78秒，这几乎等同于加热或辐照下记录的值（250°C下为50秒）。最关键的是，在栅极感应电场的帮助下，传感器在100秒内实现了完全解吸。这项工作为室温下快速非极性气体检测以及气体传感器的片上集成提供了一种新方法。
