Chemically Sensitive Resistors Based on Monolayer-Capped Cubic Nanoparticles: Towards Configurable Nanoporous Sensors

Authors

  • Ekaterina Dovgolevsky,

    1. Department of Chemical Engineering and Russell Berrie Nanotechnology Institute Technion—Israel Institute of Technology Haifa 32000 (Israel)
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  • Ulrike Tisch,

    1. Department of Chemical Engineering and Russell Berrie Nanotechnology Institute Technion—Israel Institute of Technology Haifa 32000 (Israel)
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  • Hossam Haick

    Corresponding author
    1. Department of Chemical Engineering and Russell Berrie Nanotechnology Institute Technion—Israel Institute of Technology Haifa 32000 (Israel)
    • Department of Chemical Engineering and Russell Berrie Nanotechnology Institute Technion—Israel Institute of Technology Haifa 32000 (Israel).
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  • The research was funded by the Marie Curie Excellence Grant of the European Commission, FP6, the Israel Cancer Association through a donation in honor of Helen and Arnold Hoffman's 60th wedding anniversary, and the Technion's Russell Berrie Nanotechnology Institute. H.H. holds the Horev Chair for Leaders in Science and Technology. We thank Carmelina Attalah for support with the ellipsometry measurements.

Abstract

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Cube roots: Chemiresistors based on cubic monolayer-capped nanoparticles (MCNPs) produce a higher electrical response upon exposure to volatile organic compounds than those based on spherical MCNPs. These observations are explained in terms of the higher swellability of cubic MCNPs compared to spherical MCNPs (see picture).

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