Journal article
Elementary processes governing V 2 AlC chemical etching in HF
RSC advances, v 10(42), pp 25266-25274
29 Jun 2020
PMID: 35517448
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The literature on MXenes, an important class of 2D materials discovered in 2011, is now abundant. Yet, the lack of well-defined structures, with definite crystal orientations, has so far hindered our capability to identify some key aspects ruling MXene's chemical exfoliation from their parent MAX phase. Herein the chemical exfoliation of V
AlC is studied by using well-defined square pillars with lateral sizes from 7 μm up to 500 μm, processed from centimeter-sized V
AlC single crystals. The MXene conversion kinetics are assessed with μm spatial resolution by combining Raman spectroscopy with scanning electron and optical microscopies. HF penetration, and the loss of the Al species, take place through the edges. At room temperature, and on a reasonable time scale, no etching can takes place by HF penetration through the basal planes,
normal to the basal planes. In defect-free pillars, etching through the edges is isotropic. Initially the etching rate is linear with a rate of 2.2 ± 0.3 μm h
at 25 °C. At a distance of ≈45 μm, the etching rate is greatly diminished.
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Details
- Title
- Elementary processes governing V 2 AlC chemical etching in HF
- Creators
- Youngsoo Kim - Institut polytechnique de GrenobleAthanasios Gkountaras - Grenoble Institute of TechnologyOdette Chaix-Pluchery - Grenoble Institute of TechnologyIsabelle Gélard - Grenoble Institute of TechnologyJohann Coraux - Institut NéelClaude Chapelier - Grenoble Alpes UniversityMichel W Barsoum - Drexel UniversityThierry Ouisse - Grenoble Institute of Technology
- Publication Details
- RSC advances, v 10(42), pp 25266-25274
- Publisher
- Royal Society of Chemistry
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000545357500049
- Scopus ID
- 2-s2.0-85087790539
- Other Identifier
- 991019167769404721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary