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Metallic Ti3C2Tx MXene Gas Sensors with Ultrahigh Signal-to-Noise Ratio
ACS Nano ( IF 15.8 ) Pub Date : 2018-01-25 00:00:00 , DOI: 10.1021/acsnano.7b07460 Seon Joon Kim , Hyeong-Jun Koh , Chang E. Ren 1 , Ohmin Kwon , Kathleen Maleski 1 , Soo-Yeon Cho , Babak Anasori 1 , Choong-Ki Kim , Yang-Kyu Choi , Jihan Kim , Yury Gogotsi 1 , Hee-Tae Jung
ACS Nano ( IF 15.8 ) Pub Date : 2018-01-25 00:00:00 , DOI: 10.1021/acsnano.7b07460 Seon Joon Kim , Hyeong-Jun Koh , Chang E. Ren 1 , Ohmin Kwon , Kathleen Maleski 1 , Soo-Yeon Cho , Babak Anasori 1 , Choong-Ki Kim , Yang-Kyu Choi , Jihan Kim , Yury Gogotsi 1 , Hee-Tae Jung
Affiliation
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Achieving high sensitivity in solid-state gas sensors can allow the precise detection of chemical agents. In particular, detection of volatile organic compounds (VOCs) at the parts per billion (ppb) level is critical for the early diagnosis of diseases. To obtain high sensitivity, two requirements need to be simultaneously satisfied: (i) low electrical noise and (ii) strong signal, which existing sensor materials cannot meet. Here, we demonstrate that 2D metal carbide MXenes, which possess high metallic conductivity for low noise and a fully functionalized surface for a strong signal, greatly outperform the sensitivity of conventional semiconductor channel materials. Ti3C2Tx MXene gas sensors exhibited a very low limit of detection of 50–100 ppb for VOC gases at room temperature. Also, the extremely low noise led to a signal-to-noise ratio 2 orders of magnitude higher than that of other 2D materials, surpassing the best sensors known. Our results provide insight in utilizing highly functionalized metallic sensing channels for developing highly sensitive sensors.
中文翻译：
具有超高信噪比的金属Ti 3 C 2 T x MXene气体传感器
在固态气体传感器中实现高灵敏度可以实现化学试剂的精确检测。特别是，对十亿分之一（ppb）含量的挥发性有机化合物（VOC）的检测对于疾病的早期诊断至关重要。为了获得高灵敏度，需要同时满足两个要求：（i）低电噪声和（ii）强信号，这是现有传感器材料无法满足的。在这里，我们证明了二维金属碳化物MXene具有极大的性能优于常规半导体通道材料，该二维金属碳化物MXene具有低噪音的高金属电导率和强信号的功能齐全的表面。钛3 C 2 T xMXene气体传感器在室温下对VOC气体的检测极限为50–100 ppb。而且，极低的噪声导致信噪比比其他2D材料的信噪比高2个数量级，超过了已知的最佳传感器。我们的结果为利用高度功能化的金属感测通道开发高度灵敏的传感器提供了见识。
更新日期：2018-01-25
中文翻译：
具有超高信噪比的金属Ti 3 C 2 T x MXene气体传感器
在固态气体传感器中实现高灵敏度可以实现化学试剂的精确检测。特别是，对十亿分之一（ppb）含量的挥发性有机化合物（VOC）的检测对于疾病的早期诊断至关重要。为了获得高灵敏度，需要同时满足两个要求：（i）低电噪声和（ii）强信号，这是现有传感器材料无法满足的。在这里，我们证明了二维金属碳化物MXene具有极大的性能优于常规半导体通道材料，该二维金属碳化物MXene具有低噪音的高金属电导率和强信号的功能齐全的表面。钛3 C 2 T xMXene气体传感器在室温下对VOC气体的检测极限为50–100 ppb。而且，极低的噪声导致信噪比比其他2D材料的信噪比高2个数量级，超过了已知的最佳传感器。我们的结果为利用高度功能化的金属感测通道开发高度灵敏的传感器提供了见识。
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