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MXene‐Derived Ferroelectric Crystals
Author(s) -
Tu Shaobo,
Ming Fangwang,
Zhang Junwei,
Zhang Xixiang,
Alshareef Husam N.
Publication year - 2019
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201806860
Subject(s) - materials science , ferroelectricity , nanotechnology , crystallography , optoelectronics , dielectric , chemistry
This study demonstrates the first synthesis of MXene‐derived ferroelectric crystals. Specifically, high‐aspect‐ratio potassium niobate (KNbO 3 ) ferroelectric crystals is successfully synthesized using 2D Nb 2 C, MXene, and potassium hydroxide (KOH) as the niobium and potassium source, respectively. Material analysis confirms that a KNbO 3 orthorhombic phase with Amm 2 symmetry is obtained. Additionally, ferroelectricity in KNbO 3 is confirmed using standard ferroelectric, dielectric, and piezoresponse force microscopy measurements. The KNbO 3 crystals exhibit a saturated polarization of ≈21 µC cm −2 , a remnant polarization of ≈17 µC cm −2 , and a coercive field of ≈50 kV cm −1 . This discovery illustrates that the 2D nature of MXenes can be exploited to grow ferroelectric crystals.