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Chemical Sensing with SWNT FETs

  • Kyeong-Jae Lee
  • Jing Kong
Chapter
Part of the Integrated Circuits and Systems book series (ICIR)

Introduction

SWNTs possess unique properties that make them excellent candidates for sensing technology. Because the properties of a SWNT depend sensitively on its structure and because a SWNT is composed entirely of surface atoms, a slight variation of its environment tends to have a noticeable effect on its properties. Many types of sensors have been demonstrated using nanotubes, such as chemical [1, 2, 3], biological [4], flow [5], strain [6], pressure [7, 8], thermal [9], and mass [10] sensors. In this chapter, we will focus on the chemical sensing using SWNT FET devices.

Chemical sensors based on individual SWNTs were first demonstrated in year 2000 [ 11, 12]. The devices were constructed in the field effect transistor scheme. In Ref. [ 11], a constant bias was applied between the source and the drain electrodes and the current of the SWNT was monitored while gas molecules were introduced into the chamber. It was found that the electrical resistance of a semiconducting SWNT...

Keywords

Surface Coverage Schottky Barrier Metal Contact Conductance Change Schottky Barrier Height 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

Part of the work presented in this chapter was based on Dr. Jing Kong’s thesis with Prof. Hongjie Dai at Stanford University. We deeply appreciate the valuable advices and contribution from Prof. Dai. The authors would also like to thank Prof. Anantha Chandrakasan at MIT for the encouragement and support for this work. This work was funded in part by the MARCO IFC Focus Research Center Program and Intel Corporation.

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Kyeong-Jae Lee
    • 1
  • Jing Kong
  1. 1.Department of Electrical Engineering and Computer ScienceMassachusetts Institute of TechnologyCambridgeUSA

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