Perforating Freestanding Molybdenum Disulfide Monolayers with Highly Charged Ions
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2019Access:
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Kozubek, R. and Tripathi, M. and Ghorbani-Asl, M. and Kretschmer, S. and Madauß , L. and Pollmann, E. and O'Brien, M. and McEvoy, N. and Ludacka, U. and Susi, T. and Duesberg, G.S. and Wilhelm, R.A. and Krasheninnikov, A.V. and Kotakoski, J. and Schleberger, M., Perforating Freestanding Molybdenum Disulfide Monolayers with Highly Charged Ions, Journal of Physical Chemistry Letters, 2019, 10, 5, 904-910Download Item:
Abstract:
Porous single-layer molybdenum disulfide (MoS2) 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 MoS2. 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.
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Grant Number
Science Foundation Ireland (SFI)
15/IA/3131
Science Foundation Ireland (SFI)
12/RC/2278
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http://people.tcd.ie/duesberghttp://people.tcd.ie/mcevoyni
Author: Mc Evoy, Niall; Duesberg, Georg
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Journal of Physical Chemistry Letters;10;
5;
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atomistic simulations, Porous single-layer molybdenum disulfide (MoS2), highly charged ions (HCIs)DOI:
http://dx.doi.org/10.1021/acs.jpclett.8b03666Metadata
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