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Journal article
Multimodal Spectroscopic Study of Surface Termination Evolution in Cr2TiC2Tx MXene
Advanced materials interfaces, v 8(5), pn/a
09 Mar 2021
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Control of surface functionalization of MXenes holds great potential, and in particular, may lead to tuning of magnetic and electronic order in the recently reported magnetic Cr2TiC2Tx. Here, vacuum annealing experiments of Cr2TiC2Tx are reported with in situ electron energy loss spectroscopy and novel in situ Cr K‐edge extended energy loss fine structure analysis, which directly tracks the evolution of the MXene surface coordination environment. These in situ probes are accompanied by benchmarking synchrotron X‐ray absorption fine structure measurements and density functional theory calculations. With the etching method used here, the MXene has an initial termination chemistry of Cr2TiC2O1.3F0.8. Annealing to 600 °C results in the complete loss of F, but O termination is thermally stable up to (at least) 700 °C. These findings demonstrate thermal control of F termination in Cr2TiC2Tx and offer a first step toward termination engineering this MXene for magnetic applications. Moreover, this work demonstrates high energy electron spectroscopy as a powerful approach for surface characterization in 2D materials.
Surface termination evolution of 2D magnetic MXene Cr2TiC2Tx is investigated during vacuum annealing within a transmission electron microscope. Novel electron spectroscopy methods determine that F termination can be completely removed with annealing up to 600 °C, but O termination is stable up to ≥700 °C. This work opens the door for termination engineering Cr2TiC2Tx.
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Details
- Title
- Multimodal Spectroscopic Study of Surface Termination Evolution in Cr2TiC2Tx MXene
- Creators
- James L. Hart - University of BaltimoreKanit Hantanasirisakul - Drexel UniversityAndrew C. Lang - American Society For Engineering EducationYuanyuan Li - Stony Brook UniversityFaisal Mehmood - Wright-Patterson Air Force BaseRuth Pachter - Wright-Patterson Air Force BaseAnatoly I. Frenkel - Stony Brook UniversityYury Gogotsi - Drexel UniversityMitra L. Taheri - University of BaltimoreBrookhaven National Lab. (BNL), Upton, NY (United States)
- Publication Details
- Advanced materials interfaces, v 8(5), pn/a
- Publisher
- Wiley
- Number of pages
- 6
- Grant note
- Basic Energy Sciences (DE‐SC0018618) Brookhaven National Laboratory (DE‐ SC0012704) National Science Foundation (DMR‐1429661; DMR‐1911592) U.S. Department of Energy Office of Science
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000606807700001
- Scopus ID
- 2-s2.0-85099229084
- Other Identifier
- 991019167560904721
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InCites Highlights
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Materials Science, Multidisciplinary