Journal article
Two-Dimensional Transition Metal Carbides
ACS nano, Vol.6(2), pp.1322-1331
28 Feb 2012
PMID: 22279971
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Herein we report on the synthesis of two-dimensional transition metal carbides and carbonitrides by immersing select MAX phase powders in hydrofluoric acid, HF. The MAX phases represent a large (>60 members) family of ternary, layered, machinable transition metal carbides, nitrides, and carbonitrides. Herein we present evidence for the exfoliation of the following MAX phases: Ti2AlC, Ta4AlC3, (Ti0.5,Nb0.5)2AlC, (V0.5,Cr0.5)3AlC2, and Ti3AlCN by the simple immersion of their powders, at room temperature, in HF of varying concentrations for times varying between 10 and 72 h followed by sonication. The removal of the “A” group layer from the MAX phases results in 2-D layers that we are labeling MXenes to denote the loss of the A element and emphasize their structural similarities with graphene. The sheet resistances of the MXenes were found to be comparable to multilayer graphene. Contact angle measurements with water on pressed MXene surfaces showed hydrophilic behavior.
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Details
- Title
- Two-Dimensional Transition Metal Carbides
- Creators
- Michael NaguibOlha MashtalirJoshua CarleVolker PresserJun LuLars HultmanYury GogotsiMichel W Barsoum
- Publication Details
- ACS nano, Vol.6(2), pp.1322-1331
- Publisher
- American Chemical Society; Washington, DC
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Identifiers
- 991014877813204721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology