Analysis of physical mechanisms for the detection of DNA in carbon nanotube field effect transistors for bio-sensing applications
Zhao, Yang
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https://hdl.handle.net/2142/29457
Description
Title
Analysis of physical mechanisms for the detection of DNA in carbon nanotube field effect transistors for bio-sensing applications
Author(s)
Zhao, Yang
Issue Date
2012-02-01T00:47:08Z
Director of Research (if dissertation) or Advisor (if thesis)
Liu, Gang Logan
Department of Study
Electrical & Computer Eng
Discipline
Electrical & Computer Engr
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
Carbon nanotubes
Deoxyribonucleic acid (DNA)
bio-sensing
mobility
Abstract
This thesis discusses the use of carbon nanotube field effect transistors as sensors for DNA. It proposes a band-gap modulation as the underlying physical mechanism by which detection occurs. Previous works have established that either Schottky--barrier modulation or electro--static gating are the most significant mechanisms, depending on the particular device. By analyzing field effect mobilities it can be seen that the band-gap modulation effect shows up in every device and can be a reliable means by which detection of hybridized DNA molecules can occur.
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