DNA-decorated carbon nanotubes for chemical sensing

A. T. Charlie Johnson, Cristian Staii, Michelle Chen, Sam Khamis, Robert Johnson, M. L. Klein, A. Gelperin

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


We demonstrate a versatile class of nanoscale chemical sensors based on single-stranded DNA (ssDNA) for chemical recognition and single-walled carbon nanotube field effect transistors (SWNT FETs) for electronic read-out. SWNT FETs with a nanoscale coating of ssDNA respond to vapors that cause no detectable conductivity change in bare devices. Sensor responses differ in sign and magnitude for different gases and can be tuned by choice of the ssDNA base sequence. Sensors respond and recover rapidly (seconds), and the sensor surface is self-regenerating. Preliminary results of all-atom molecular dynamics simulations agree with experiment.

Original languageEnglish (US)
Pages (from-to)3252-3256
Number of pages5
JournalPhysica Status Solidi (B) Basic Research
Issue number13
StatePublished - Nov 2006

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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