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首页> 外文期刊>ACS nano >Differentiation of complex vapor mixtures using versatile DNA-carbon nanotube chemical sensor arrays
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Differentiation of complex vapor mixtures using versatile DNA-carbon nanotube chemical sensor arrays

机译：使用通用的DNA-碳纳米管化学传感器阵列区分复杂的蒸气混合物

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摘要

Vapor sensors based on functionalized carbon nanotubes (NTs) have shown great promise, with high sensitivity conferred by the reduced dimensionality and exceptional electronic properties of the NT. Critical challenges in the development of NT-based sensor arrays for chemical detection include the demonstration of reproducible fabrication methods and functionalization schemes that provide high chemical diversity to the resulting sensors. Here, we outline a scalable approach to fabricating arrays of vapor sensors consisting of NT field effect transistors functionalized with single-stranded DNA (DNA-NT). DNA-NT sensors were highly reproducible, with responses that could be described through equilibrium thermodynamics. Target analytes were detected even in large backgrounds of volatile interferents. DNA-NT sensors were able to discriminate between highly similar molecules, including structural isomers and enantiomers. The sensors were also able to detect subtle variations in complex vapors, including mixtures of structural isomers and mixtures of many volatile organic compounds characteristic of humans.
机译：基于功能化碳纳米管（NTs）的蒸汽传感器已显示出巨大的希望，因为NT的尺寸减小和非凡的电子性能使其具有很高的灵敏度。用于化学检测的基于NT的传感器阵列开发中的关键挑战包括可再现的制造方法和功能化方案的演示，这些方法和功能化方案可为所得传感器提供高度的化学多样性。在这里，我们概述了一种可伸缩的方法来制造由单链DNA（DNA-NT）功能化的NT场效应晶体管组成的蒸汽传感器阵列。 DNA-NT传感器具有很高的重现性，其响应可以通过平衡热力学来描述。即使在大范围的挥发性干扰物背景下也可以检测到目标分析物。 DNA-NT传感器能够区分高度相似的分子，包括结构异构体和对映异构体。这些传感器还能够检测复杂蒸气中的细微变化，包括结构异构体的混合物以及人类特有的多种挥发性有机化合物的混合物。

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