Perforating Freestanding Molybdenum Disulfide Monolayers with Highly Charged Ions

Author(s)
Roland Kozubek, Mukesh Tripathi, Mahdi Ghorbani-Asl, Silvan Kretschmer, Lukas Madauß, Erik Pollmann, Maria O'Brien, Niall McEvoy, Ursula Ludacka, Toma Susi, Georg S. Duesberg, Richard A. Wilhelm, Arkady V. Krasheninnikov, Jani Kotakoski, Marika Schleberger
Abstract

Porous single-layer molybdenum disulfide (MoS

2

) is a promising material for applications such as DNA sequencing and water desalination. In this work, we introduce irradiation with highly charged ions (HCIs) as a new technique to fabricate well-defined pores in MoS

2

. Surprisingly, we find a linear increase of the pore creation efficiency over a broad range of potential energies. Comparison to atomistic simulations reveals the critical role of energy deposition from the ion to the material through electronic excitation in the defect creation process and suggests an enrichment in molybdenum in the vicinity of the pore edges at least for ions with low potential energies. Analysis of the irradiated samples with atomic resolution scanning transmission electron microscopy reveals a clear dependence of the pore size on the potential energy of the projectiles, establishing irradiation with highly charged ions as an effective method to create pores with narrow size distributions and radii between ca. 0.3 and 3 nm.

Organisation(s)
Physics of Nanostructured Materials
Journal
Journal of Physical Chemistry Letters
Volume
10
Pages
904-910
No. of pages
7
ISSN
1948-7185
DOI
https://doi.org/10.1021/acs.jpclett.8b03666
Publication date
03-2019
Publication status
Published
Peer reviewed
Yes
Austrian Fields of Science 2012
103042 Electron microscopy, 103018 Materials physics, 210004 Nanomaterials, 103008 Experimental physics
ASJC Scopus subject areas
Materials Science(all), Physical and Theoretical Chemistry
Portal url
https://ucris.univie.ac.at/portal/en/publications/perforating-freestanding-molybdenum-disulfide-monolayers-with-highly-charged-ions(405ab852-c216-4ff5-b5f1-0190d2bab87f).html