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Updated: Jan 15, 2026
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A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
Published on: April 8, 2018
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A 2D Van Der Waals Molecular Ferroelectric.
Xiao-Gang Chen1, Yan Qin1, Hui-Peng Lv1
1Ordered Matter Science Research Center, Nanchang University, Nanchang, 330031, P. R. China.
Advanced Materials (Deerfield Beach, Fla.)
|October 14, 2025
Summary
A new molecular 2D van der Waals ferroelectric, sodium 2,2,3,3-tetrafluoropropionate (2,2,3,3-TFPS), exhibits robust room-temperature ferroelectricity in ultrathin flakes down to 9 nm.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Two-dimensional (2D) van der Waals (vdW) ferroelectrics are crucial for advanced applications like in-memory computing.
- Existing 2D ferroelectrics are scarce, primarily inorganic, limiting material diversity.
- Developing new categories of 2D vdW ferroelectrics is essential for novel phenomena.
Purpose of the Study:
- To design and synthesize a novel molecular 2D vdW ferroelectric material.
- To investigate the ferroelectric properties of the new material, particularly in ultrathin forms.
- To expand the range of 2D vdW ferroelectrics for nanoscale device applications.
Main Methods:
- Molecular design through H/F substitution to create sodium 2,2,3,3-tetrafluoropropionate (2,2,3,3-TFPS).
- Characterization of the layered crystal structure and vdW interactions.
- Measurement of ferroelectric properties in mechanically exfoliated ultrathin flakes.
Main Results:
- Successfully designed and synthesized the molecular 2D vdW ferroelectric 2,2,3,3-TFPS with a unique layered structure.
- Demonstrated robust room-temperature ferroelectricity in 2,2,3,3-TFPS flakes as thin as 9 nm.
- Achieved ferroelectricity in sub-10 nm thickness, a first for molecular 2D vdW ferroelectrics.
Conclusions:
- 2,2,3,3-TFPS represents the first molecular 2D vdW ferroelectric exhibiting robust ferroelectricity at ultrathin thicknesses.
- This discovery broadens the scope of 2D vdW ferroelectrics.
- Highlights potential for molecular 2D vdW ferroelectrics in low-dimensional and nanoscale electronic devices.
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