Perforating Freestanding Molybdenum Disulfide Monolayers with Highly Charged Ions

Research output: Contribution to journalArticleScientificpeer-review

Researchers

  • 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 Krasheninnikov

  • Jani Kotakoski
  • Marika Schleberger

Research units

  • University of Duisburg-Essen
  • University of Vienna
  • Helmholtz-Zentrum Dresden-Rossendorf
  • Trinity College Dublin
  • Universität der Bundeswehr München
  • Vienna University of Technology

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.

Details

Original languageEnglish
Pages (from-to)904-910
Number of pages7
JournalJournal of Physical Chemistry Letters
Publication statusPublished - 1 Jan 2019
MoE publication typeA1 Journal article-refereed

ID: 32390803