Single-stranded DNA decorated carbon nanotube transistors for chemical sensing

Cristian Staii, Michelle Chen, Alan Gelperin, Alan T. Johnson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We demonstrate that single walled carbon nanotube field effect transistors (swCN-FET) decorated with single stranded DNA (ss-DNA) form a new, versatile, and highly sensitive class of nanoscale chemical sensors. These sensors are based on ss-DNA as the chemical recognition site and swCN-FET as the electronic read-out component. The ss-DNA decorated swCN-FETs are sensitive to chemical species (odors) that do not cause a detectable response in bare, as-fabricated swCN-FETs. Furthermore, odor responses ss-DNA decorated FETs differ in sign and magnitude for different odors, and the response characteristics depend on the base sequence of the ss-DNA used to decorate the swCN. The sensor surface is self-regenerating: samples maintain a constant response with no need for sensor refreshing through at least several dozens gas exposure cycles. These remarkable attributes suggest that DNA-decorated swCN-FET sensors could be created with sensitivity to a large variety of compounds, as required for "electronic-nose" and "electronic tongue" applications in medicine and homeland security.

Original languageEnglish (US)
Title of host publicationNanoparticles and Nanostructures in Sensors and Catalysis
PublisherMaterials Research Society
Pages241-246
Number of pages6
ISBN (Print)1558998543, 9781558998544
DOIs
StatePublished - 2005
Externally publishedYes
Event2005 MRS Fall Meeting - Boston, MA, United States
Duration: Nov 28 2005Dec 2 2005

Publication series

NameMaterials Research Society Symposium Proceedings
Volume900
ISSN (Print)0272-9172

Conference

Conference2005 MRS Fall Meeting
CountryUnited States
CityBoston, MA
Period11/28/0512/2/05

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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