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


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
Number of pages6
ISBN (Print)1558998543, 9781558998544
StatePublished - 2005
Event2005 MRS Fall Meeting - Boston, MA, United States
Duration: Nov 28 2005Dec 2 2005

Publication series

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


Conference2005 MRS Fall Meeting
Country/TerritoryUnited States
CityBoston, MA

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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