DNA-decorated carbon nanotubes for chemical sensing

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dc.creatorStaii, Cristian
dc.creatorChen, Michelle
dc.creatorGelperin, Alan
dc.creatorJohnson Jr, Alan T.
dc.date2005-09-02
dc.date.accessioned2026-07-07T03:06:30Z
dc.date.available2026-07-07T03:06:30Z
dc.descriptionWe demonstrate a new, versatile class of nanoscale chemical sensors based on single-stranded DNA (ss-DNA) as the chemical sensors recognition site and single-walled carbon nanotube field effect transistors (swCN-FET) as the electronic read-out component. swCN-FETs with a nanoscale coating of ss-DNA respond to gas odors that do not cause a detectable conductivity change in bare devices. Responses of ss-DNA/swCN-FETs differ in sign and magnitude for different gases, and can be tuned by choosing the base sequence of the ss-DNA. ss-DNA/swCN-FET 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 very 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.
dc.description9 pages, 5 figures, Nano Letters web release: 23-Aug-2005
dc.identifierhttps://arxiv.org/abs/cond-mat/0509047
dc.identifierhttp://arxiv.org/abs/cond-mat/0509047
dc.identifierdoi:10.1021/nl051261f
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/26827
dc.subjectMaterials Science
dc.subjectStrongly Correlated Electrons
dc.titleDNA-decorated carbon nanotubes for chemical sensing
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