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Transparent Conductive Two-Dimensional Titanium Carbide Epitaxial Thin Films
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High Resolution Image Download MS PowerPoint Slide 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 ∼1 × 1 cm 2 Ti 3 C 2 films by selective etching of Al, from sputter-deposited epitaxial Ti 3 AlC 2 films, in aqueous HF or NH 4 HF 2 . Films that were about 19 nm thick, etched with NH 4 HF 2, transmit ∼90% of the light in the visible-to-infrared range and exhibit metallic conductivity down 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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Metadata
- Authors
- Halim, J., Lukatskaya, M. R., Cook, K. M., Lu, J., Smith, C. R., Näslund, L.-Å., May, S. J., Hultman, L., Gogotsi, Y., Eklund, P., & Barsoum, M. W.
- Venue
- Chemistry of Materials
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-03-19
- Volume
- 26
- Issue
- 7
- Pages
- 2374-2381
- ISSN
- 0897-4756 (ISSN-L)
- 1520-5002
- OpenAlex
- W2038020702
- Cited by
- 1,698
- References
- 3
- FWCI
- 20.70
- Type
- journal article
- Language
- en
- Open access
- hybrid
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