沙林
甲基膦酸二甲酯
石墨烯
软件可移植性
分析物
材料科学
纳米技术
质谱法
化学
计算机科学
有机化学
色谱法
酶
程序设计语言
乙酰胆碱酯酶
作者
Natalia Alzate-Carvajal,Jae-Woo Park,Martin Pykal,Petr Lazar,Ranjana Rautela,Samantha Scarfe,Lukas Scarfe,Jean‐Michel Ménard,Michal Otyepka,Adina Luican‐Mayer
标识
DOI:10.1021/acsami.1c17770
摘要
Real time, rapid, and accurate detection of chemical warfare agents (CWA) is an ongoing security challenge. Typical detection methods for CWA are adapted from traditional chemistry techniques such as chromatography and mass spectrometry, which lack portability. Here, we address this challenge by evaluating graphene field effect transistors (GFETs) as a sensing platform for sarin gas using both experiment and theory. Experimentally, we measure the sensing response of GFETs when exposed to dimethyl methylphosphonate (DMMP), a less toxic compound used as simulant due to its chemical similarities to sarin. We find low detection limits of 800 ppb, the highest sensitivity reported up to date for this type of sensing platform. In addition to changes in resistance, we implement an in-operando monitor of the GFETs characteristics during and after exposure to the analyte, which gives insights into the graphene-DMMP interactions. Moreover, using theoretical calculations, we show that DMMP and sarin interact similarly with graphene, implying that GFETs should be highly sensitive to detecting sarin. GFETs offer a versatile platform for the development of compact and miniaturized devices that can provide real-time detection of dangerous chemicals in the local environment.
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