The effects of adsorption orientations on transport through a nanotube gas sensor

ORAL

Abstract

We calculate the quantum transport of a nanoelectronic gas sensor for various adsorption orentations of the gas molecules. The nanosensor employs electronic transport properties of a carbon nanotube exposed to NO$_2$ molecules. The calculations are based on ab initio electronic structures, combined with the Green's function formulation of Landauer's transport theory. Our results show that different energetically equivalent orientations of the NO$_2$ molecules result in different details of transport characteristics. The main features of transport modulation, however, are the same for all the orientations. Implications for nanotube-based gas sensors are discussed.

*This work is supported by the National Science Foundation grant ECCS-0925939.

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Authors

  • Amir A. Farajian

    • Department of Mechanical and Materials Engineering, Wright State University

  • Arta Sadrzadeh

    • Department of Mechanical Engineering and Materials Science, Rice University

  • Olga V. Pupysheva

    • Department of Mechanical Engineering and Materials Science, Rice University

  • Boris Yakobson

    • Rice University
    • Department of Mechanical Engineering and Materials Science, Rice University, Houston, TX 77006
    • Department of Mechanical Engineering and Materials Science, Rice University