Differentiation of Complex Vapor Mixtures Using Versatile DNA–Carbon Nanotube Chemical Sensor Arrays
Citations Over TimeTop 10% of 2013 papers
Abstract
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.
Related Papers
- → Predicted low thermal conductivities in antimony films and the role of chemical functionalization(2016)29 cited
- → A study on the effect of different chemical routes on functionalization of MWCNTs by various groups (-COOH, -SO3H, -PO3H2)(2011)15 cited
- → Monolithic methacrylate polymeric sorbents: Development of methods for chemical modification of the surface for the subsequent bioaffine functionalization(2008)6 cited
- → Effects of Chemical Functionalization on Single-Walled Carbon Nanotubes by Mild Hydrogen Peroxide for PV Applications(2019)1 cited
- → Carbon Nanotubes(2023)3 cited