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DNA sensing by field-effect transistors based on networks of carbon nanotubes.

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DNA sensing by field-effect transistors based on networks of carbon nanotubes.

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Title: DNA sensing by field-effect transistors based on networks of carbon nanotubes.
Author: Gui, Ee Ling.; Li, Lain-Jong.; Zhang, Keke.; Xu, Yangping.; Dong, Xiaochen.; Ho, Xinning.; Lee, Pooi See.; Kasim, Johnson.; Shen, Zexiang.; Rogers, John A.; Mhaisalkar, Subodh Gautam.
Copyright year: 2007
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.
Subject: DRNTU::Engineering::Materials.
Type: Journal Article
Series/ Journal Title: Journal of the American chemical society
School: School of Materials Science and Engineering
Rights: © 2007 American Chemical Society

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