Nanopores in suspended WS$_2$ membranes for DNA sequencing

ORAL

Abstract

Recent advances in solid-state nanopore sensor systems for DNA detection and analysis have been supported by using increasingly thinner materials to the point of utilizing atomically thin two-dimensional materials such as graphene and MoS$_2$. However, these materials still have issues with pore wettability and signal-to-noise ratios displayed in DNA translocation measurements. Recently, the fabrication and operation of nanopores in MoS$_2$ have been demonstrated, but the wetting properties and signal-to-noise ratios of transition metal dichalcogenides are yet to be understood and further improved. Here we fabricate suspended WS$_2$ nanopore devices with sub-10 nm pore diameters using a novel nanomaterial transfer method and TEM nanosculpting to study and better understand nanopore wetting properties and performance in DNA translocation measurements.

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Authors

  • Gopinath Danda

    • Department of Electrical and Systems Engineering, University of Pennsylvania

  • Paul Masih Das

    • Department of Physics and Astronomy, University of Pennsylvania

  • Yung-Chien Chou

    • Department of Physics and Astronomy, University of Pennsylvania

  • Jerome Mlack

    • Department of Physics and Astronomy, University of Pennsylvania

  • Carl Naylor

    • Department of Physics and Astronomy, University of Pennsylvania

  • Nestor Perea-Lopez

    • Department of Physics, The Pennsylvania State University

  • Zhong Lin

    • Department of Physics, The Pennsylvania State University

  • Laura Beth Fulton

    • Department of Mechanical Engineering, University of Pittsburgh

  • Mauricio Terrones

    • Department of Physics, The Pennsylvania State University

  • A. T. Charlie Johnson

    • Department of Physics and Astronomy, University of Pennsylvania

  • Marija Drndic

    • Department of Physics and Astronomy, University of Pennsylvania