<br>基于 6,6′,6″-(Nitrilotris(苯-4,1-二基))三(5-苯基吡嗪-2,3-二甲腈)传感材料的自修复、层压、低电阻 NH3 传感器，可在室温下运行温度,ACS Sensors

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基于 6,6′,6″-(Nitrilotris(苯-4,1-二基))三(5-苯基吡嗪-2,3-二甲腈)传感材料的自修复、层压、低电阻 NH3 传感器，可在室温下运行温度
ACS Sensors ( IF 8.2 ) Pub Date : 2023-12-30 , DOI: 10.1021/acssensors.3c01804
Junming He ₁ , Baoyan Liang ₂ , Weibo Kong ₃ , Jianan Dai ₁ , Fangmeng Liu _{1,

4} , Si Pan ₁ , Chenguang Wang ₁ , Peng Sun _{1,

4} , Bonan Kang ₁ , Yue Wang ₅ , Geyu Lu _{1,

4}

Affiliation

随着物联网概念的快速发展，具有模拟人类嗅觉功能的气体传感器成为不可替代的关键元件。其中氨（NH ₃ ）传感器在呼吸测试、环境监测、安全等领域发挥着重要作用。然而，制造具有高稳定性和抗机械损伤的高性能器件仍然是一个挑战。本工作以具有优异自修复能力的聚氨酯（PU）为基材，通过应用具有吸收NH ₃基团的有机分子和层压结构，从新型敏感材料设计和器件结构优化出发设计了传感器。结构缩短电子传输路径以实现低电阻状态和良好的传感性能。据此，成功研制出基于6,6′,6″-(次氮基三(苯-4,1-二基))三(5-苯基吡嗪-2,3-二甲腈)(TPA-3DCNPZ)的室温柔性NH ₃传感器。发达。该装置可以通过热蒸发辅助方法进行自我修复。它在 98% 相对湿度 (RH) 下表现出 1 ppm 的检测限，并具有出色的稳定性、选择性、弯曲灵活性和自愈特性。通过复阻抗图（CIP）和密度泛函理论（DFT）进一步研究了高相对湿度下NH ₃传感性能的改善，这归因于NH ₃吸附的增强。基于TPA-3DCNPZ的NH ₃传感器被证明在模拟呼气以确定肾脏疾病的严重程度和治疗进展方面具有巨大的应用潜力。该工作也为构建高性能室温NH ₃传感器提供了新思路。

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Self-Healing, Laminated, and Low Resistance NH3 Sensor Based on 6,6′,6″-(Nitrilotris(benzene-4,1-diyl))tris(5-phenylpyrazine-2,3-dicarbonitrile) Sensing Material Operating at Room Temperature

With the rapid development of the concept of the Internet of Things (IoT), gas sensors with the function of simulating the human sense of smell became irreplaceable as a key element. Among them, ammonia (NH₃) sensors played an important role in respiration tests, environmental monitoring, safety, and other fields. However, the fabrication of the high-performance device with high stability and resistance to mechanical damages was still a challenge. In this work, polyurethane (PU) with excellent self-healing ability was applied as the substrate, and the sensor was designed from new sensitive material design and device structure optimization, through applying the organic molecule with groups which could absorb NH₃ and the laminated structure to shorten the electronic transmission path to achieve a low resistance state and favorable sensing properties. Accordingly, a room temperature flexible NH₃ sensor based on 6,6′,6″-(nitrilotris(benzene-4,1-diyl))tris(5-phenylpyrazine-2,3-dicarbonitrile) (TPA-3DCNPZ) was successfully developed. The device could self-heal by means of a thermal evaporation assisted method. It exhibited a detection limit of 1 ppm at 98% relative humidity (RH), as well as great stability, selectivity, bending flexibility, and self-healing properties. The improved NH₃ sensing performance under high RH was further investigated by complex impedance plots (CIPs) and density functional theory (DFT), attributing to the enhanced adsorption of NH₃. The TPA-3DCNPZ based NH₃ sensors proved to have great potential for application on simulated exhaled breath to determine the severity of kidney diseases and the progress of treatment. This work also provided new ideas for the construction of high-performance room temperature NH₃ sensors.

更新日期：2023-12-30

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