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Electrical and Elastic Properties of Individual Single-Layer Nb4C3Tx MXene Flakes

Journal Article · · Advanced Electronic Materials
 [1];  [2];  [3];  [4];  [3];  [3];  [4];  [4];  [5];  [6];  [5]
  1. Univ. of Nebraska, Lincoln, NE (United States); Drexel University
  2. Drexel Univ., Philadelphia, PA (United States). A. J. Drexel Nanotechnology Inst.
  3. Univ. of Nebraska, Lincoln, NE (United States)
  4. Jilin Univ., Changchun (China). Key Lab. of Physics and Technology for Advanced Batteries
  5. Univ. of Nebraska, Lincoln, NE (United States). Center for Materials and Nanoscience
  6. Drexel Univ., Philadelphia, PA (United States). A. J. Drexel Nanotechnology Inst.; Jilin Univ., Changchun (China). Key Lab. of Physics and Technology for Advanced Batteries
2D carbides and nitrides (MXenes) are widely recognized for their exceptional promise for numerous applications. However, physical property measurements of their individual monolayers remain very limited despite their importance for revealing the intrinsic physical properties of MXenes. The first mechanical and electrical measurements of individual single-layer flakes of Nb4C3Tx MXene, which are prepared via an improved synthetic method are reported. Characterization of field-effect transistor devices based on individual single-layer Nb4C3Tx flakes shows an electrical conductivity of 1024 ± 165 S cm-1, which is two orders of magnitude higher than the previously reported values for bulk Nb4C3Tx assemblies, and an electron mobility of 0.41 ± 0.27 cm2 V-1 s-1. Atomic force microscopy nanoindentation measurements of monolayer Nb4C3Tx membranes yield an effective Young's modulus of 386 ± 13 GPa, assuming a membrane thickness of 1.26 nm. This is the highest value reported for nanoindentation measurements of solution-processable 2D materials, revealing the potential of Nb4C3Tx as a primary component for various mechanical applications. In conclusion, the agreement between the mechanical properties of 2D Nb4C3Tx MXene and cubic NbC suggests that the extensive experimental data on bulk carbides could be useful for identifying new MXenes with improved functional characteristics.
Research Organization:
Drexel Univ., Philadelphia, PA (United States)
Sponsoring Organization:
National Science Foundation (NSF); Nebraska Center for Energy Sciences Research (NCESR); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0018618
OSTI ID:
1774206
Journal Information:
Advanced Electronic Materials, Journal Name: Advanced Electronic Materials Journal Issue: 4 Vol. 6; ISSN 2199-160X
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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