Monolayer WS2 Nanopores for DNA Translocation with Light-Adjustable Sizes

Gopinath Danda; Paul Masih Das; Yung Chien Chou; Jerome T. Mlack; William M. Parkin; Carl H. Naylor; Kazunori Fujisawa; Tianyi Zhang; Laura Beth Fulton; Mauricio Terrones; Alan T.Charlie Johnson; Marija Drndić

doi:10.1021/acsnano.6b08028

Monolayer WS₂ Nanopores for DNA Translocation with Light-Adjustable Sizes

Gopinath Danda, Paul Masih Das, Yung Chien Chou, Jerome T. Mlack, William M. Parkin, Carl H. Naylor, Kazunori Fujisawa, Tianyi Zhang, Laura Beth Fulton, Mauricio Terrones, Alan T.Charlie Johnson, Marija Drndić

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119 Scopus citations

Abstract

Two-dimensional materials are promising for a range of applications, as well as testbeds for probing the physics of low-dimensional systems. Tungsten disulfide (WS₂) monolayers exhibit a direct band gap and strong photoluminescence (PL) in the visible range, opening possibilities for advanced optoelectronic applications. Here, we report the realization of two-dimensional nanometer-size pores in suspended monolayer WS₂ membranes, allowing for electrical and optical response in ionic current measurements. A focused electron beam was used to fabricate nanopores in WS₂ membranes suspended on silicon-based chips and characterized using PL spectroscopy and aberration-corrected high-resolution scanning transmission electron microscopy. It was observed that the PL intensity of suspended WS₂ monolayers is ∼10-15 times stronger when compared to that of substrate-supported monolayers, and low-dose scanning transmission electron microscope viewing and drilling preserves the PL signal of WS₂ around the pore. We establish that such nanopores allow ionic conductance and DNA translocations. We also demonstrate that under low-power laser illumination in solution, WS₂ nanopores grow slowly in size at an effective rate of ∼0.2-0.4 nm/s, thus allowing for atomically controlled nanopore size using short light pulses.

Original language	English (US)
Pages (from-to)	1937-1945
Number of pages	9
Journal	ACS nano
Volume	11
Issue number	2
DOIs	https://doi.org/10.1021/acsnano.6b08028
State	Published - Feb 28 2017

All Science Journal Classification (ASJC) codes

General Materials Science
General Engineering
General Physics and Astronomy

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10.1021/acsnano.6b08028

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title = "Monolayer WS2 Nanopores for DNA Translocation with Light-Adjustable Sizes",

abstract = "Two-dimensional materials are promising for a range of applications, as well as testbeds for probing the physics of low-dimensional systems. Tungsten disulfide (WS2) monolayers exhibit a direct band gap and strong photoluminescence (PL) in the visible range, opening possibilities for advanced optoelectronic applications. Here, we report the realization of two-dimensional nanometer-size pores in suspended monolayer WS2 membranes, allowing for electrical and optical response in ionic current measurements. A focused electron beam was used to fabricate nanopores in WS2 membranes suspended on silicon-based chips and characterized using PL spectroscopy and aberration-corrected high-resolution scanning transmission electron microscopy. It was observed that the PL intensity of suspended WS2 monolayers is ∼10-15 times stronger when compared to that of substrate-supported monolayers, and low-dose scanning transmission electron microscope viewing and drilling preserves the PL signal of WS2 around the pore. We establish that such nanopores allow ionic conductance and DNA translocations. We also demonstrate that under low-power laser illumination in solution, WS2 nanopores grow slowly in size at an effective rate of ∼0.2-0.4 nm/s, thus allowing for atomically controlled nanopore size using short light pulses.",

author = "Gopinath Danda and {Masih Das}, Paul and Chou, {Yung Chien} and Mlack, {Jerome T.} and Parkin, {William M.} and Naylor, {Carl H.} and Kazunori Fujisawa and Tianyi Zhang and Fulton, {Laura Beth} and Mauricio Terrones and Johnson, {Alan T.Charlie} and Marija Drndi{\'c}",

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AU - Danda, Gopinath

AU - Masih Das, Paul

AU - Chou, Yung Chien

AU - Mlack, Jerome T.

AU - Parkin, William M.

AU - Naylor, Carl H.

AU - Fujisawa, Kazunori

AU - Zhang, Tianyi

AU - Fulton, Laura Beth

AU - Terrones, Mauricio

AU - Johnson, Alan T.Charlie

AU - Drndić, Marija

PY - 2017/2/28

Y1 - 2017/2/28

N2 - Two-dimensional materials are promising for a range of applications, as well as testbeds for probing the physics of low-dimensional systems. Tungsten disulfide (WS2) monolayers exhibit a direct band gap and strong photoluminescence (PL) in the visible range, opening possibilities for advanced optoelectronic applications. Here, we report the realization of two-dimensional nanometer-size pores in suspended monolayer WS2 membranes, allowing for electrical and optical response in ionic current measurements. A focused electron beam was used to fabricate nanopores in WS2 membranes suspended on silicon-based chips and characterized using PL spectroscopy and aberration-corrected high-resolution scanning transmission electron microscopy. It was observed that the PL intensity of suspended WS2 monolayers is ∼10-15 times stronger when compared to that of substrate-supported monolayers, and low-dose scanning transmission electron microscope viewing and drilling preserves the PL signal of WS2 around the pore. We establish that such nanopores allow ionic conductance and DNA translocations. We also demonstrate that under low-power laser illumination in solution, WS2 nanopores grow slowly in size at an effective rate of ∼0.2-0.4 nm/s, thus allowing for atomically controlled nanopore size using short light pulses.

AB - Two-dimensional materials are promising for a range of applications, as well as testbeds for probing the physics of low-dimensional systems. Tungsten disulfide (WS2) monolayers exhibit a direct band gap and strong photoluminescence (PL) in the visible range, opening possibilities for advanced optoelectronic applications. Here, we report the realization of two-dimensional nanometer-size pores in suspended monolayer WS2 membranes, allowing for electrical and optical response in ionic current measurements. A focused electron beam was used to fabricate nanopores in WS2 membranes suspended on silicon-based chips and characterized using PL spectroscopy and aberration-corrected high-resolution scanning transmission electron microscopy. It was observed that the PL intensity of suspended WS2 monolayers is ∼10-15 times stronger when compared to that of substrate-supported monolayers, and low-dose scanning transmission electron microscope viewing and drilling preserves the PL signal of WS2 around the pore. We establish that such nanopores allow ionic conductance and DNA translocations. We also demonstrate that under low-power laser illumination in solution, WS2 nanopores grow slowly in size at an effective rate of ∼0.2-0.4 nm/s, thus allowing for atomically controlled nanopore size using short light pulses.

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Monolayer WS₂ Nanopores for DNA Translocation with Light-Adjustable Sizes

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