Room temperature ammonia gas sensor based on ionic conductive biomass hydrogels
Room temperature ammonia gas sensor based on ionic conductive biomass hydrogels
复制标题
基于离子导电生物质水凝胶的室温氨气传感器
DOI：
10.1016/j.snb.2020.128318
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发表时间：
2020-10-01
影响因子：
8.4
通讯作者：
Zhang, Tong
中科院分区：
文献类型：
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作者：
Liu, Lichao;Fei, Teng;Zhang, Tong
对呼气中氨(NH3)的灵敏检测，可能为肾脏疾病的早期诊断提供有用的信息。传统的NH3化学传感器通常会受到环境湿度的影响。在本工作中，基于生物质水凝胶聚L-谷氨酸和L-谷氨酸(PGA/GA)，研制了一种在25℃的高湿度下工作的NH3传感器，具有增强的响应和选择性。优化的PGA/GA传感器在80%相对湿度(RH)下对50ppm NH3的响应达到8.4，可以检测到0.5ppm的NH3。利用复阻抗曲线和石英晶体微天平对PGA/GA传感器特殊的离子导电NH3机理进行了深入的研究。生物材料的高响应、低检测限、高稳定性和无毒特性表明，PGA/GA传感器在呼气分析仪中具有广阔的应用前景。
Sensitive detection of ammonia (NH3) in exhaled human breath, may offer useful information for early diagnosis of kidney disease. Traditional chemical NH3 sensors usually suffer from ambient humidity. In this work, NH3 sensor operating under high humidity at 25 celcius with enhanced response and selectivity has been achieved based on biomass hydrogel poly-L-glutamic acid and L-glutamic acid (PGA/GA). The response of the optimum PGA/GA sensor to 50 ppm NH3 at 80% relative humidity (RH) reaches 8.4, and the sensor can detect 0.5 ppm NH3. The special ionic conductive NH3 mechanism of the PGA/GA sensor was intensively studied by complex impedance plots and a quartz crystal microbalance. The high response, low detection limit, high stability and the non-toxic characteristics of biomaterials suggest PGA/GA sensors are promising for exhaled breath analyzer.