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DNA-Decorated Carbon Nanotubes for Chemical Sensing
Open accessAbstract
We demonstrate a new, versatile class of nanoscale chemical sensors based on single-stranded DNA (ss-DNA) 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 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 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.
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Cited by
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Metadata
- Authors
- Staii, C., Johnson, A. T., Chen, M., & Gelperin, A.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2005-08-23
- Volume
- 5
- Issue
- 9
- Pages
- 1774-1778
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W2760907751
- Cited by
- 449
- References
- 0
- FWCI
- 27.01
- Type
- journal article
- Language
- en
- Open access
- green
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