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Highly sensitive carbon nanotube-embedding gas sensors operating at atmospheric pressure

机译：在大气压下运行的高灵敏度碳纳米管嵌入式气体传感器

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摘要

Highly sensitive palladium (Pd) decorated carbon nanotube (CNT) embedding gas sensors working at atmospheric pressure were fabricated. Two types of gas sensors of bare CNTs and Pd nanoparticle decorated CNTs were synthesized by dielectrophoresis. The CNT-containing solution was dropped onto the patterned-platinum electrodes with ac bias. The CNT-embedding sensors sensitively detected 100 ppb level of NO2 in an atmospheric pressure condition. The Pd decoration on CNTs forming the depletion region was found to be an effective way to enhance the sensor response by the control of carrier mobility and density. Raman spectroscopy revealed a low defect ratio of D/G(-) by heat treatment at 450 degrees C. Moreover, it was investigated that there exists an optimum temperature to enhance the sensor response.
机译：制备了在大气压下工作的高灵敏度钯（Pd）装饰的碳纳米管（CNT）嵌入式气体传感器。通过介电电泳法合成了裸露的碳纳米管和钯纳米颗粒修饰的碳纳米管两种气体传感器。将含CNT的溶液以交流偏压滴加到图案化的铂电极上。 CNT嵌入传感器在大气压条件下灵敏地检测到100 ppb的NO2水平。发现在形成耗尽区的CNT上进行Pd装饰是通过控制载流子迁移率和密度来增强传感器响应的有效方法。拉曼光谱显示通过在450℃下的热处理，D / G（-）的缺陷率低。此外，研究了存在用于增强传感器响应的最佳温度。

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