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A charge pumping technique to identify biomolecular charge polarity using a nanogap embedded biotransistor

Source: Appl. Phys. Lett. 97, 073702 (2010); doi:10.1063/1.3473819

Published 19 August 2010

KEYWORDS and PACS
Keywords
PACS
  • 85.65.+h
    Molecular electronic devices
  • 85.30.Tv
    Semiconductor field effect devices
  • YEAR: 2010
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PUBLICATION DATA
ISSN:
1553-9644 (online)
Publisher:
AIP is a member of CrossRef AIP
Sungho Kim,1 Jee-Yeon Kim,1 Jae-Hyuk Ahn,1 Tae Jung Park,2 Sang Yup Lee,2,3 and Yang-Kyu Choi1,3
1Department of Electrical Engineering, KAIST, Daejeon 305-701, South Korea
2BioProcess Engineering Research Center, Center for Systems and Synthetic Biotechnology, and Institute for the BioCentury, KAIST, Daejeon 305-701, South Korea
3Department of Bio and Brain Engineering, Department of Biological Sciences, Bioinformatics Research Center, KAIST, Daejeon 305-701, South Korea
Charge pumping technique is investigated to identify biomolecular charge polarity using a nanogap-embedded biotransistor. Biomolecules immobilized in a nanogap provide additional charges in the gate dielectric. They give rise to a change in the charge pumping current, as detected by applying a designed pulse waveform. The measured results are analyzed with the aid of numerical simulations. The proposed charge pumping technique represents an insightful method of investigating the electrical properties of biomolecules beyond biosensing. ©2010 American Institute of Physics
History: Received 2 March 2010; accepted 12 July 2010; published 19 August 2010
Permalink: http://link.aip.org/link/?APPLAB/97/073702/1

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