Control of electronic properties of 2D carbides (MXenes) by manipulating their transition metal layers
Abstract
In our study, a transition from metallic to semiconducting-like behavior has been demonstrated in two-dimensional (2D) transition metal carbides by replacing titanium with molybdenum in the outer transition metal (M) layers of M3C2 and M4C3 MXenes. The MXene structure consists of n + 1 layers of near-close packed M layers with C or N occupying the octahedral site between them in an [MX]nM arrangement. Recently, two new families of ordered 2D double transition metal carbides MXenes were discovered, M'2M''C2 and M'2M''2C3 – where M' and M'' are two different early transition metals, such as Mo, Cr, Ta, Nb, V, and Ti. The M' atoms only occupy the outer layers and the M'' atoms fill the middle layers. In other words, M' atomic layers sandwich the middle M''–C layers. Using X-ray atomic pair distribution function (PDF) analysis on Mo2TiC2 and Mo2Ti2C3 MXenes, we present the first quantitative analysis of structures of these novel materials and experimentally confirm that Mo atoms are in the outer layers of the [MC]nM structures. Furthermore, the electronic properties of these Mo-containing MXenes are compared with their Ti3C2 counterparts, and are found to be no longer metallic-like conductors; instead the resistance increases mildly with decreasing temperatures. Densitymore »
- Authors:
-
- Drexel Univ., Philadelphia, PA (United States)
- Columbia Univ., New York, NY (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Columbia Univ., New York, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States); Energy Frontier Research Centers (EFRC) (United States). Fluid Interface Reactions, Structures and Transport Center (FIRST)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); Drexel Univ. (United States); King Abdullah Univ. of Science and Technology (KAUST) (Saudi Arabia); Army Research Office (United States)
- OSTI Identifier:
- 1261289
- Alternate Identifier(s):
- OSTI ID: 1327611
- Grant/Contract Number:
- AC05-00OR22725; AC02-05CH11231; SC0012704; DMR-1534910; CRG 3; W911NF-15-1-0133
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nanoscale Horizons
- Additional Journal Information:
- Journal Volume: 1; Journal Issue: 3; Journal ID: ISSN 2055-6756
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Anasori, Babak, Shi, Chenyang, Moon, Eun Ju, Xie, Yu, Voigt, Cooper A., Kent, Paul R. C., May, Steven J., Billinge, Simon J. L., Barsoum, Michel W., and Gogotsi, Yury. Control of electronic properties of 2D carbides (MXenes) by manipulating their transition metal layers. United States: N. p., 2016.
Web. doi:10.1039/C5NH00125K.
Anasori, Babak, Shi, Chenyang, Moon, Eun Ju, Xie, Yu, Voigt, Cooper A., Kent, Paul R. C., May, Steven J., Billinge, Simon J. L., Barsoum, Michel W., & Gogotsi, Yury. Control of electronic properties of 2D carbides (MXenes) by manipulating their transition metal layers. United States. https://doi.org/10.1039/C5NH00125K
Anasori, Babak, Shi, Chenyang, Moon, Eun Ju, Xie, Yu, Voigt, Cooper A., Kent, Paul R. C., May, Steven J., Billinge, Simon J. L., Barsoum, Michel W., and Gogotsi, Yury. Wed .
"Control of electronic properties of 2D carbides (MXenes) by manipulating their transition metal layers". United States. https://doi.org/10.1039/C5NH00125K. https://www.osti.gov/servlets/purl/1261289.
@article{osti_1261289,
title = {Control of electronic properties of 2D carbides (MXenes) by manipulating their transition metal layers},
author = {Anasori, Babak and Shi, Chenyang and Moon, Eun Ju and Xie, Yu and Voigt, Cooper A. and Kent, Paul R. C. and May, Steven J. and Billinge, Simon J. L. and Barsoum, Michel W. and Gogotsi, Yury},
abstractNote = {In our study, a transition from metallic to semiconducting-like behavior has been demonstrated in two-dimensional (2D) transition metal carbides by replacing titanium with molybdenum in the outer transition metal (M) layers of M3C2 and M4C3 MXenes. The MXene structure consists of n + 1 layers of near-close packed M layers with C or N occupying the octahedral site between them in an [MX]nM arrangement. Recently, two new families of ordered 2D double transition metal carbides MXenes were discovered, M'2M''C2 and M'2M''2C3 – where M' and M'' are two different early transition metals, such as Mo, Cr, Ta, Nb, V, and Ti. The M' atoms only occupy the outer layers and the M'' atoms fill the middle layers. In other words, M' atomic layers sandwich the middle M''–C layers. Using X-ray atomic pair distribution function (PDF) analysis on Mo2TiC2 and Mo2Ti2C3 MXenes, we present the first quantitative analysis of structures of these novel materials and experimentally confirm that Mo atoms are in the outer layers of the [MC]nM structures. Furthermore, the electronic properties of these Mo-containing MXenes are compared with their Ti3C2 counterparts, and are found to be no longer metallic-like conductors; instead the resistance increases mildly with decreasing temperatures. Density functional theory (DFT) calculations suggest that OH terminated Mo–Ti MXenes are semiconductors with narrow band gaps. Measurements of the temperature dependencies of conductivities and magnetoresistances have confirmed that Mo2TiC2Tx exhibits semiconductor-like transport behavior, while Ti3C2Tx is a metal. Finally, this finding opens new avenues for the control of the electronic and optical applications of MXenes and for exploring new applications, in which semiconducting properties are required.},
doi = {10.1039/C5NH00125K},
journal = {Nanoscale Horizons},
number = 3,
volume = 1,
place = {United States},
year = {Wed Feb 24 00:00:00 EST 2016},
month = {Wed Feb 24 00:00:00 EST 2016}
}
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