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Title: DNA sensing by field-effect transistors based on networks of carbon nanotubes
Authors: Rogers, John A.
Dong, Xiaochen
Ho, Xinning
Lee, Pooi See
Kasim, Johnson
Shen, Zexiang
Mhaisalkar, Subodh Gautam
Gui, Ee Ling
Li, Lain-Jong
Zhang, Keke
Xu, Yangping
Keywords: DRNTU::Engineering::Materials
Issue Date: 2007
Source: Gui, E. L., Li, L. J., Zhang, K., Xu, Y., Dong, X., Ho, X., et al. (2007). DNA sensing by field-effect transistors based on networks of carbon nanotubes. Journal of the American chemical society, 129(46), 14427-14432.
Series/Report no.: Journal of the American chemical society
Abstract: We report on the sensing mechanism of electrical detection of deoxyribonucleic acid (DNA) hybridization for Au- and Cr-contacted field effect transistors based on single-walled carbon nanotube (SWCNT) networks. Barrier height extraction via low-temperature electrical measurement provides direct evidence for the notion that the energy level alignment between electrode and SWCNTs can be affected by DNA immobilization and hybridization. The study of location-selective capping using photoresist provides comprehensive evidence that the sensing of DNA is dominated by the change in metal−SWCNT junctions rather than the channel conductance.
DOI: 10.1021/ja075176g
Rights: © 2007 American Chemical Society
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles

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