Arrays of DNA-functionalized graphene field-effect transistors (gFETs) hold great promise for high-performance vapor sensing. In this chapter, we describe methods for the scalable production of gFET-based vapor sensors with high sensitivity and efficiency in size, cost, and time. Large-area graphene sheets were prepared via chemical vapor deposition (CVD); a standard photolithographic processing for large-area graphene was used to fabricate gFETs with high mobility and low doping level under ambient conditions. The gFETs were functionalized by single-stranded DNA (ssDNA), which binds to the graphene channels through π–π stacking interaction and provides affinity to a wide range of chemical vapors. The resulting sensing arrays demonstrate detection of target vapor molecules down to parts-per-million concentrations with high selectivity among analytes with high chemical similarity including a series of carboxylic acids and structural isomers of carboxylic acids and pinene.
CITATION STYLE
Ping, J., & Johnson, A. T. C. (2019). Scalable Arrays of Chemical Vapor Sensors Based on DNA-Decorated Graphene. In Methods in Molecular Biology (Vol. 2027, pp. 163–170). Humana Press Inc. https://doi.org/10.1007/978-1-4939-9616-2_13
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