MXene-Derived Ferroelectric Crystals

Shao Bo Tu, Fangwang Ming, Junwei Zhang, Xixiang Zhang, Husam N. Alshareef

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

This study demonstrates the first synthesis of MXene-derived ferroelectric crystals. Specifically, high-aspect-ratio potassium niobate (KNbO3 ) ferroelectric crystals is successfully synthesized using 2D Nb2 C, MXene, and potassium hydroxide (KOH) as the niobium and potassium source, respectively. Material analysis confirms that a KNbO3 orthorhombic phase with Amm2 symmetry is obtained. Additionally, ferroelectricity in KNbO3 is confirmed using standard ferroelectric, dielectric, and piezoresponse force microscopy measurements. The KNbO3 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.
Original languageEnglish (US)
Pages (from-to)1806860
JournalAdvanced Materials
Volume31
Issue number14
DOIs
StatePublished - Feb 14 2019

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