Strain-Induced Change of Gas Adsorption Properties of Graphene and its Application to a Gas Sensor
Strain-Induced Change of Gas Adsorption Properties of Graphene and its Application to a Gas Sensor
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DOI：
10.23919/icep58572.2023.10129780
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发表时间：
2023-04
期刊：
影响因子：
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通讯作者：
Xiangyu Qiao;Meng Yin;Ken Suzuki;H. Miura
中科院分区：
文献类型：
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作者：
Xiangyu Qiao;Meng Yin;Ken Suzuki;H. Miura
石墨烯优异的机械和电学性能以及对气体的吸附能力使其成为一种很有前途的柔性气敏材料。通过第一性原理计算发现，应变改变了气体分子在石墨烯表面的吸附能。为了验证分析结果，将石墨烯转移到柔性聚合物基片上，制备了石墨烯柔性气体传感器，并研究了该传感器对NO2分子的响应。已经证实，石墨烯对这种气体表现出可重复的响应。在弯曲变形下，对2-ppm NO2的响应提高了约6倍，这有力地表明了机械应变控制石墨烯气体吸附行为的可能性。
The excellent mechanical and electrical properties and gas adsorption ability make graphene a promising candidate for flexible gas sensing material. The strain has been found to change the adsorption energy of gas molecules on graphene surfaces by first-principles calculations. To validate this analysis result, a graphene-based flexible gas sensor was fabricated by transferring graphene onto a soft polymer substrate and the response of the sensor to NO2 molecules was investigated. It was confirmed that graphene shows a repeatable response to this gas. Under the application of bending deformation, the response to 2-ppm NO2 was increased by about 6 times, which strongly indicated the possibility of controlling the gas adsorption behavior of graphene by mechanical strain.