Oxygen Plasma-Treated Graphene Oxide Surface Functionalization for Sensitivity Enhancement of Thin-Film Piezoelectric Acoustic Gas Sensors.
Oxygen Plasma-Treated Graphene Oxide Surface Functionalization for Sensitivity Enhancement of Thin-Film Piezoelectric Acoustic Gas Sensors.
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DOI：
10.1021/acsami.7b09547
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发表时间：
2017-11
影响因子：
9.5
通讯作者：
Hongyuan Zhao;Shuangqing Fan;Yan Chen;Zhihong Feng;Hao F. Zhang;W. Pang;Daihua Zhang;Menglun Zhang-Men
中科院分区：
文献类型：
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作者：
Hongyuan Zhao;Shuangqing Fan;Yan Chen;Zhihong Feng;Hao F. Zhang;W. Pang;Daihua Zhang;Menglun Zhang-Men
在这项工作中，我们提出了一种薄膜压电声学气体传感器，通过氧等离子体处理的氧化石墨烯（GO）功能化的表面改性策略增强灵敏度。通过暴露于不同浓度的氨蒸汽（NH3）在控制的温度和湿度，GO涂层的声学传感器的特性进行了研究，即，灵敏度，线性度，响应，和恢复时间。氧等离子体处理的GO涂层传感器进一步提高了灵敏度相比，新鲜制备的GO涂层传感器。通过X射线光电子能谱（XPS）、拉曼光谱、扫描电镜（SEM）和精密称重等表征手段，探讨了氧等离子体处理对GO膜传感器性能的影响机理。发现氧等离子体处理向GO薄片引入了许多缺陷，这些缺陷均匀地分布在GO表面上，提供了更多的气体分子结合位点。
In this work, we presented a thin-film piezoelectric acoustic gas sensor with enhanced sensitivity by a surface modification strategy of oxygen plasma treated graphene oxide (GO) functionalization. By exposing to ammonia vapor (NH3) of various concentrations at controlled temperature and humidity, the characteristics of the GO-coated acoustic sensor were investigated, that is, sensitivity, linearity, response, and recovery time. Oxygen plasma treatment of the GO-coated sensor further enhanced the sensitivity compared with the freshly prepared GO-coated sensor. The mechanism of oxygen plasma treatment effect on the GO-coated sensor was discussed based on characterizations of X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, scanning electron microscope (SEM), and precise weighing of the acoustic sensor. It was found that the oxygen plasma treatment introduces numerous defects to GO flakes, which are uniformly distributed across the GO surface, providing more gas molecule binding sites.