State Key Laboratory of Reliability and Intelligence of Electrical Equipment, School of Health Sciences and Biomedical Engineering, Hebei University of Technology, Tianjin, 300130, P. R. China.
State Key Laboratory for Reliability and Intelligence of Electrical Equipment, Hebei Key Laboratory of Smart Sensing and Human-Robot Interaction, School of Mechanical Engineering, Hebei University of Technology, Tianjin, 300130, P. R. China.
Adv Mater. 2023 Apr;35(14):e2210322. doi: 10.1002/adma.202210322. Epub 2023 Mar 1.
Monitoring nitrogen utilization efficiency and soil temperature in agricultural systems for timely intervention is essential for crop health with reduced environmental pollution. Herein, this work presents a high-performance multi-parameter sensor based on vanadium oxide (VO )-doped laser-induced graphene (LIG) foam to completely decouple nitrogen oxides (NO ) and temperature. The highly porous 3D VO -doped LIG foam composite is readily obtained by laser scribing vanadium sulfide (V S )-doped block copolymer and phenolic resin self-assembled films. The heterojunction formed at the LIG/VO interface provides the sensor with enhanced response to NO and an ultralow limit of detection of 3 ppb (theoretical estimate of 451 ppt) at room temperature. The sensor also exhibits a wide detection range, fast response/recovery, good selectivity, and stability over 16 days. Meanwhile, the sensor can accurately detect temperature over a wide linear range of 10-110 °C. The encapsulation of the sensor with a soft membrane further allows for temperature sensing without being affected by NO . The unencapsulated sensor operated at elevated temperature removes the influences of relative humidity and temperature variations for accurate NO measurements. The capability to decouple nitrogen loss and soil temperature paves the way for the development of future multimodal decoupled electronics for precision agriculture and health monitoring.
监测农业系统中的氮利用效率和土壤温度对于作物健康至关重要，可以减少环境污染。在此，本工作提出了一种基于氧化钒（VO ）掺杂激光诱导石墨烯（LIG）泡沫的高性能多参数传感器，可完全分离氮氧化物（NO ）和温度。高度多孔的 3D VO 掺杂 LIG 泡沫复合材料可通过激光刻蚀硫化钒（V S ）掺杂嵌段共聚物和酚醛树脂自组装膜来轻易获得。LIG/VO 界面形成的异质结为传感器提供了对 NO 的增强响应，在室温下的检测限低至 3 ppb（理论估计为 451 ppt）。该传感器还具有较宽的检测范围、快速的响应/恢复速度、良好的选择性和超过 16 天的稳定性。同时，该传感器可以在 10-110°C 的宽线性范围内准确地检测温度。通过软膜对传感器进行封装，进一步实现了在不受 NO 影响的情况下进行温度感应。在高温下运行的未封装传感器可消除相对湿度和温度变化对准确测量 NO 的影响。这种分离氮损失和土壤温度的能力为未来用于精准农业和健康监测的多模态解耦电子设备的发展铺平了道路。
