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Electronic transport properties of a single-wall carbon nanotube field effect transistor with deoxyribonucleic acid conjugation

✍ Scribed by J.S. Hwang; H.T. Kim; M.H. Son; J.H. Oh; S.W. Hwang; D. Ahn

Publisher: Elsevier Science
Year: 2008
Tongue: English
Weight: 195 KB
Volume: 40
Category: Article
ISSN: 1386-9477
DOI: 10.1016/j.physe.2007.08.019

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✦ Synopsis

We investigate the electronic transport properties of a deoxyribonucleic acid (DNA)-conjugated carbon nanotube (CNT) field effect transistor (CNTFET) device. The CNTFET exhibited a strong decrease of the drain current after DNA conjugation. The observed decrease can be explained by the formation of new scattering centers induced from defects at CNT-DNA binding spots. These surface scattering centers will decrease the transmission probability in CNTs. These results can be applied to biosensors, which detect the amount of conjugated DNA molecules.

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