Shape-Deformable and Locomotive MXene (Ti3C2Tx)-Encapsulated Magnetic Liquid Metal for 3D-Motion-Adaptive Synapses

Ho Yeon Kim, Kyuho Lee, Jin Woo Oh, Youngwoo Kim, Jung Eun Park, Jihye Jang, Seung Won Lee, Seokyeong Lee, Chong Min Koo, Cheolmin Park

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1 Citation (Scopus)


Owing to their unique surface chemistry, room-temperature pseudoliquidity, and high electrical conductivity, gallium-based liquid metals (LMs) exhibit multifunctionality. To grant deformable and self-flowing characteristics to LMs, magnetic particles are incorporated for precisely controlling the LM motion and shape deformability. However, LM surface-adhesion and corrosivity hinders the integration of LMs into complex circuits and devices owing to potential alloying with other metals and contamination of their surroundings. In this study, a highly conductive Ti3C2Tx (MXene)-encapsulated magnetic LM (MX–MLM) is developed using a feasible fabrication method. The MX–MLM comprises magnetic particles suspended within its core and self-assembled MXene flakes on the surface to maintain the nonwettability and high electrical conductivity of a liquid droplet. The noncorrosivity and increased magnetism of the MX–MLM enable nonstick magnetic-field-induced locomotion and shape deformation on various surfaces including metals, oxides, and polymers. Furthermore, the MX–MLM exhibits recyclability and magnetic-field-induced self-healing. To demonstrate its functionality, the MX–MLM is employed as a magnetointeractive, shape-deformable, and locomotive top gate electrode in a transistor fabricated using a ferroelectric polymer gate insulator. The device exhibits excellent magnetointeractive synaptic capability for detecting and learning 3D path information.

Original languageEnglish
Article number2210385
JournalAdvanced Functional Materials
Issue number5
Publication statusPublished - 2023 Jan 26

Bibliographical note

Funding Information:
This research was supported by the Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (No. 2018M3D1A1058536). This research was also supported by a grant from National Research Foundation of Korea (NRF) funded by the Korean government (MEST) (No. 2020R1A2B5B03002697). This work was partially supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) and the Korea Institute of Science and Technology (KIST) (No. 2021M3H4A1A03047331).

Publisher Copyright:
© 2022 Wiley-VCH GmbH.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics


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