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

被引：133

作者：

Gui, Ee Ling

Li, Lain-Jong

Zhang, Keke

Xu, Yangping

Dong, Xiaochen

Ho, Xinning

Lee, Pooi See

Kasim, Johnson

Shen, Z. X.

Rogers, John A.

Mhaisalkar, S. G.

机构：

[1] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore

[2] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA

[3] Univ Illinois, Dept Chem, Urbana, IL 61801 USA

[4] Nanyang Technol Univ, Sch Phys & Math Sci, Singapore 639798, Singapore

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2007年 / 129卷 / 46期

关键词：

D O I：

10.1021/ja075176g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：14427 / 14432

页数：6

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