DNA-decorated carbon nanotubes for chemical and biological sensing

A. T. Johnson, Cristian Staii, Michelle Chen, Sam Khamis, R. Johnson, Alan Gelperin

Research output: Contribution to conferencePaper

Abstract

We demonstrate a new, versatile class of nanoscale chemical sensors based on single-stranded DNA (ssDNA) as the chemical recognition site and single-walled carbon nanotube field effect transistors (swCN FETs) as the electronic read-out component. swCN FETs with a nanoscale coating of ssDNA respond to gas odors that do not cause a detectable conductivity change in bare devices. Responses of DNA-deocrated FETs differ in sign and magnitude for different gases, and can be tuned by choosing the base sequence of the ssDNA. These sensors detect a variety of odors, with rapid response and recovery times on the scale of seconds. The sensor surface is self-regenerating: samples maintain a constant response with no need for sensor refreshing through at least 50 gas exposure cycles. This remarkable set of attributes makes sensors based on ss-DNA decorated nanotubes very promising for "electronic nose" and "electronic tongue" applications ranging from homeland security to disease diagnosis.

Original languageEnglish (US)
Pages256-260
Number of pages5
StatePublished - Dec 1 2006
Externally publishedYes
Event3rd Conference on Foundations of Nanoscience: Self-Assembled Architectures and Devices, FNANO 2006 - Snowbird, UT, United States
Duration: Apr 23 2006Apr 27 2006

Conference

Conference3rd Conference on Foundations of Nanoscience: Self-Assembled Architectures and Devices, FNANO 2006
CountryUnited States
CitySnowbird, UT
Period4/23/064/27/06

All Science Journal Classification (ASJC) codes

  • Hardware and Architecture
  • Electrical and Electronic Engineering

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  • Cite this

    Johnson, A. T., Staii, C., Chen, M., Khamis, S., Johnson, R., & Gelperin, A. (2006). DNA-decorated carbon nanotubes for chemical and biological sensing. 256-260. Paper presented at 3rd Conference on Foundations of Nanoscience: Self-Assembled Architectures and Devices, FNANO 2006, Snowbird, UT, United States.