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Monolayer WS2 Nanopores for DNA Translocation with Light-Adjustable Sizes.
Danda, Gopinath; Masih Das, Paul; Chou, Yung-Chien; Mlack, Jerome T; Parkin, William M; Naylor, Carl H; Fujisawa, Kazunori; Zhang, Tianyi; Fulton, Laura Beth; Terrones, Mauricio; Johnson, Alan T Charlie; Drndic, Marija.
Afiliação
  • Danda G; Department of Physics and Astronomy and ‡Department of Electrical and Systems Engineering, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States.
  • Masih Das P; Department of Physics, Center for 2-Dimensional and Layered Materials, ∥Department of Chemistry, and ⊥Department of Materials Science and Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States.
  • Chou YC; Department of Physics and Astronomy and ‡Department of Electrical and Systems Engineering, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States.
  • Mlack JT; Department of Physics, Center for 2-Dimensional and Layered Materials, ∥Department of Chemistry, and ⊥Department of Materials Science and Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States.
  • Parkin WM; Department of Physics and Astronomy and ‡Department of Electrical and Systems Engineering, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States.
  • Naylor CH; Department of Physics, Center for 2-Dimensional and Layered Materials, ∥Department of Chemistry, and ⊥Department of Materials Science and Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States.
  • Fujisawa K; Department of Physics and Astronomy and ‡Department of Electrical and Systems Engineering, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States.
  • Zhang T; Department of Physics, Center for 2-Dimensional and Layered Materials, ∥Department of Chemistry, and ⊥Department of Materials Science and Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States.
  • Fulton LB; Department of Physics and Astronomy and ‡Department of Electrical and Systems Engineering, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States.
  • Terrones M; Department of Physics, Center for 2-Dimensional and Layered Materials, ∥Department of Chemistry, and ⊥Department of Materials Science and Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States.
  • Johnson AT; Department of Physics and Astronomy and ‡Department of Electrical and Systems Engineering, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States.
  • Drndic M; Department of Physics, Center for 2-Dimensional and Layered Materials, ∥Department of Chemistry, and ⊥Department of Materials Science and Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States.
ACS Nano ; 11(2): 1937-1945, 2017 02 28.
Article em En | MEDLINE | ID: mdl-28125779
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.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Tungstênio / DNA / Dissulfetos / Nanoporos / Luz Idioma: En Revista: ACS Nano Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Tungstênio / DNA / Dissulfetos / Nanoporos / Luz Idioma: En Revista: ACS Nano Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Estados Unidos