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Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites
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Ti C MXenes with fully saturated and thermally stable Cl terminations
1Thin Film Physics Division, Department of Physics, Chemistry and Biology (IFM), Linköping University SE-581 83 Linköping Sweden per.persson@liu.se.
Nanoscale Advances
|September 22, 2022
Summary
Researchers discovered atomic chlorine (Cl) as a new, stable surface termination for MXenes, expanding their potential applications. This robust Cl termination overcomes limitations of traditional fluorine and oxygen terminations, enhancing material properties.
Area of Science:
- Materials Science
- Nanotechnology
- Surface Chemistry
Background:
- MXenes are 2D materials with tunable properties, but their performance is limited by surface terminations like fluorine (F) and oxygen (O).
- A need exists for novel, robust surface terminations to enhance MXene functionality and expand their application scope.
Purpose of the Study:
- To investigate novel surface terminations on MXenes synthesized via Lewis acidic melts.
- To characterize the stability and properties of these new terminations.
Main Methods:
- High-resolution scanning transmission electron microscopy (STEM) and image simulations.
- First-principles calculations.
- In situ STEM-electron energy loss spectroscopy (EELS) heating experiments.
Main Results:
- Atomic chlorine (Cl) was identified as the primary surface termination on synthesized MXenes.
- Other termination species were present only in residual amounts.
- Cl terminations demonstrated stability up to 750 °C.
Conclusions:
- Atomic chlorine is a stable and attractive new termination for MXenes.
- This discovery significantly broadens the functionalization possibilities for MXenes.
- The findings enable new applications for this versatile class of 2D materials.
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