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Journal article
Mechanical Exfoliation of Select MAX Phases and Mo4Ce4Al7C3 Single Crystals to Produce MAXenes
Small (Weinheim an der Bergstrasse, Germany), v 16(4), pn/a
01 Jan 2020
PMID: 31867896
Abstract
MXenes-2D carbides/nitrides derived from their bulk nanolamellar M(n)(+1)AX(n) phase (MAX) counterparts-are, for the most part, obtained by chemical etching. Despite the fact that the M-A bonds in the MAX phases are not weak, in this work it is demonstrated that relatively large MAX single crystals can be mechanically exfoliated using the adhesive tape method to produce flakes whose thickness can be reduced down to half a unit cell. The exfoliated flakes, transferred onto SiO2/Si substrates, are analyzed using electric force microscopy (EFM). No appreciable variation in EFM signal with flake thickness is found. EFM contrast between the flakes and SiO2 not only depends on the contact surface potential, but also on the local capacitance. The contribution of the latter can be used to show the metallic character-confirmed by four-contact resistivity measurements-of even the thinnest of flakes. Because the A-layers are preserved, strictly speaking MXenes are not dealt with in this work, but rather MAXenes. This is important in the case where the "A" layers contain magnetic elements such as Mo4Ce4Al7C3, whose structure is a derivative of the MAX structure.
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Details
- Title
- Mechanical Exfoliation of Select MAX Phases and Mo4Ce4Al7C3 Single Crystals to Produce MAXenes
- Creators
- Athanasios Gkountaras - Grenoble Alpes UniversityYoungsoo Kim - Université Grenoble AlpesJohann Coraux - Institut NéelVincent Bouchiat - Institut NéelSimone Lisi - Institut NéelMichel W. Barsoum - Drexel UniversityThierry Ouisse - Grenoble Alpes University
- Publication Details
- Small (Weinheim an der Bergstrasse, Germany), v 16(4), pn/a
- Publisher
- Wiley
- Number of pages
- 8
- Grant note
- Chair-of-Excellence Program of the Nanosciences Foundation (Universite Grenoble-Alpes Foundation) ANR-18-CE09-0041 / Agence Nationale de la Recherche; French National Research Agency (ANR); European Commission Flag-ERA JTC 2017 project
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000503857100001
- Scopus ID
- 2-s2.0-85076815017
- Other Identifier
- 991019168703504721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied
- Physics, Condensed Matter