期刊
CHEMISTRY OF MATERIALS
卷 26, 期 7, 页码 2374-2381出版社
AMER CHEMICAL SOC
DOI: 10.1021/cm500641a
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资金
- Swedish Research Council (VR) [621-2012-4430, 621-2011-4420]
- VR Linnaeus Strong Research Environment LiLi-NFM
- Swedish Foundation for Strategic Research (SSF) through the Synergy Grant FUN-CASE
- Ingvar Carlsson Award [3]
- Knut and Alice Wallenberg Foundation
- U.S. Office of Naval Research [ONR N00014-11-1-0109]
- U.S. Army Research Office [W911NF-11-1-0283]
- US Department of Energy, Energy Storage Systems Research Program through Sandia National Laboratory
Since the discovery of graphene, the quest for two-dimensional (2D) materials has intensified greatly. Recently, a new family of 2D transition metal carbides and carbonitrides (MXenes) was discovered that is both conducting and hydrophilic, an uncommon combination. To date MXenes have been produced as powders, flakes, and colloidal solutions. Herein, we report on the fabrication of similar to 1 x 1 cm(2) Ti3C2 films by selective etching of Al, from sputter-deposited epitaxial Ti3AlC2 films, in aqueous HF or NH4HF2. Films that were about 19 nm thick, etched with NH4HF2, transmit similar to 90% of the light in the visible-to-infrared range and exhibit metallic conductivity down to similar to 100 K. Below 100 K, the films' resistivity increases with decreasing temperature and they exhibit negative magnetoresistance-both observations consistent with a weak localization phenomenon characteristic of many 2D defective solids. This advance opens the door for the use of MXenes in electronic, photonic, and sensing applications.
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