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Research Article

Tunable diameter electrostatically formed nanowire for high sensitivity gas sensing

Alex HenningNandhini SwaminathanAndrey GodkinGil ShalevIddo AmitYossi Rosenwaks( )
Department of Physical ElectronicsSchool of Electrical EngineeringTel-Aviv UniversityRamat-Aviv69978Israel
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Abstract

We report on an electrostatically formed nanowire (EFN)-based sensor with tunable diameters in the range of 16 nm to 46 nm and demonstrate an EFNbased field-effect transistor as a highly sensitive and robust room temperature gas sensor. The device was carefully designed and fabricated using standard integrated processing to achieve the 16 nm EFN that can be used for sensing without any need for surface modification. The effective diameter for the EFN was determined using Kelvin probe force microscopy accompanied by threedimensional electrostatic simulations. We show that the EFN transistor is capable of detecting 100 parts per million of ethanol gas with bare SiO2.

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Nano Research
Pages 2206-2215
Cite this article:
Henning A, Swaminathan N, Godkin A, et al. Tunable diameter electrostatically formed nanowire for high sensitivity gas sensing. Nano Research, 2015, 8(7): 2206-2215. https://doi.org/10.1007/s12274-015-0730-1

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Received: 04 September 2014
Revised: 15 January 2015
Accepted: 16 January 2015
Published: 27 May 2015
© Tsinghua University Press and Springer‐Verlag Berlin Heidelberg 2015
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