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DNA‐decorated carbon nanotubes for chemical sensing
Author(s) -
Johnson A. T. Charlie,
Staii Cristian,
Chen Michelle,
Khamis Sam,
Johnson Robert,
Klein M. L.,
Gelperin A.
Publication year - 2006
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200669148
Subject(s) - carbon nanotube , nanoscopic scale , nanotechnology , materials science , field effect transistor , transistor , dna , conductivity , chemistry , physics , biochemistry , quantum mechanics , voltage
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. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)