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Two-Dimensional Transition Metal Carbides
University of Penn.
University of Penn.
University of Penn.
University of Penn.
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2012 (English)In: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 6, no 2, 1322-1331 p.Article in journal (Refereed) Published
Abstract [en]

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 (andgt;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, (Ti-0.5,Nb-0.5)(2)AlC, (V-0.5,Cr-0.5)(3)AlC2, 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.

Place, publisher, year, edition, pages
American Chemical Society , 2012. Vol. 6, no 2, 1322-1331 p.
Keyword [en]
MXene, two-dimensional materials, carbides, carbonitrides, exfoliation
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-76024DOI: 10.1021/nn204153hISI: 000300757900040OAI: oai:DiVA.org:liu-76024DiVA: diva2:512819
Note
Funding Agencies|Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the U.S. Department of Energy|DE-AC02-05CH11231|Batteries for Advanced Transportation Technologies (BATT)|6951370|Commonwealth of Pennsylvania||Alexander von Humboldt Foundation||Available from: 2012-03-29 Created: 2012-03-23 Last updated: 2017-12-07

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Lu, JunHultman, Lars

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