Determination of Cleavage Energy and Efficient Nanostructuring of Layered Materials by Atomic Force Microscopy.

Autor: Rasche B; Department of Chemistry, University of Cologne, 50939 Cologne, Germany., Brunner J; Leibniz IFW Dresden, Helmholtzstrasse 20, D-01069 Dresden, Germany., Schramm T; Leibniz IFW Dresden, Helmholtzstrasse 20, D-01069 Dresden, Germany., Ghimire MP; Central Department of Physics, Tribhuvan University, Kirtipur 44613, Kathmandu, Nepal., Nitzsche U; Leibniz IFW Dresden, Helmholtzstrasse 20, D-01069 Dresden, Germany., Büchner B; Leibniz IFW Dresden, Helmholtzstrasse 20, D-01069 Dresden, Germany.; Department of Physics, TU Dresden, D-01062 Dresden, Germany., Giraud R; Leibniz IFW Dresden, Helmholtzstrasse 20, D-01069 Dresden, Germany.; Université Grenoble Alpes, CNRS, CEA, Grenoble-INP, Spintec, F-38000 Grenoble, France., Richter M; Leibniz IFW Dresden, Helmholtzstrasse 20, D-01069 Dresden, Germany.; Dresden Center for Computational Materials Science (DCMS), TU Dresden, D-01062 Dresden, Germany., Dufouleur J; Leibniz IFW Dresden, Helmholtzstrasse 20, D-01069 Dresden, Germany.; Center for Transport and Devices, TU Dresden, D-01062 Dresden, Germany.
Jazyk: angličtina
Zdroj: Nano letters [Nano Lett] 2022 May 11; Vol. 22 (9), pp. 3550-3556. Date of Electronic Publication: 2022 Apr 15.
DOI: 10.1021/acs.nanolett.1c04868
Abstrakt: A method is presented to use atomic force microscopy to measure the cleavage energy of van der Waals materials and similar quasi-two-dimensional materials. The cleavage energy of graphite is measured to be 0.36 J/m 2 , in good agreement with literature data. The same method yields a cleavage energy of 0.6 J/m 2 for MoS 2 as a representative of the dichalcogenides. In the case of the weak topological insulator Bi 14 Rh 3 I 9 no cleavage energy is obtained, although cleavage is successful with an adapted approach. The cleavage energies of these materials are evaluated by means of density-functional calculations and literature data. This further validates the presented method and sets an upper limit of about 0.7 J/m 2 to the cleavage energy that can be measured by the present setup. In addition, this method can be used as a tool for manipulating exfoliated flakes, prior to or after contacting, which may open a new route for the fabrication of nanostructures.
Databáze: MEDLINE
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