Supersensitive Detection of Explosives by Silicon Nanowire Arrays

Authors

  • Yoni Engel,

    1. School of Chemistry, The Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978 (Israel), Fax: (+972) 3-640-7137
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    • These authors contributed equally to this work.

  • Roey Elnathan,

    1. School of Chemistry, The Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978 (Israel), Fax: (+972) 3-640-7137
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    • These authors contributed equally to this work.

  • Alexander Pevzner,

    1. School of Chemistry, The Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978 (Israel), Fax: (+972) 3-640-7137
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  • Guy Davidi,

    1. School of Chemistry, The Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978 (Israel), Fax: (+972) 3-640-7137
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  • Prof. Eli Flaxer,

    1. School of Chemistry, The Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978 (Israel), Fax: (+972) 3-640-7137
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  • Prof. Fernando Patolsky

    1. School of Chemistry, The Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978 (Israel), Fax: (+972) 3-640-7137
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  • This work was in part financially supported by the Legacy Fund–Israel Science Foundation (ISF) and the German–Israeli Foundation (GIF).

Abstract

original image

Dog on a chip: Explosives can be detected with unprecedented sensitivity by using arrays of silicon nanowire field-effect transistors modified with an electron-rich aminosilane monolayer, which form complexes with the analytes (see picture). These “nanosniffers” can be used to sense the presence of TNT at concentrations as low as 1×10−6 ppt, which is superior to that of sniffer dogs or any other known explosive detection method.

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