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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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