ウェアラブルデバイスが指の曲げ伸ばしで記憶と電源を作る(Wearable device makes memories and powers up with the flex of a finger)

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2023-10-19 ロイヤルメルボルン工科大学(RMIT)

◆新たなイノベーションは、指に取り付けられる伸縮性ケーシングに単一のナノ材料を使用し、指を曲げることで電力を生成でき、メモリタスクも実行可能。通常の多機能デバイスとは異なり、高精度なナノ材料の積層を必要としない。
◆ビスマスの低温液体金属から製造し、医療用ウェアラブルデバイスから銀行券のエンコードまで幅広い応用が見込まれる。研究は優れた反応性を示し、将来のウェアラブルテクノロジーに大きな可能性を持つ。

<関連情報>

液体金属ビスマスから多機能原子状薄膜酸化物を開発 Multi-Functional Atomically Thin Oxides from Bismuth Liquid Metal

Xiangyang Guo, Chung Kim Nguyen, Nitu Syed, Anil Ravindran, Md Akibul Islam, Tobin Filleter, Kun Cao, Yichao Wang, Aishani Mazumder, Chenglong Xu, Sumeet Walia, Mohammad B. Ghasemian, Kourosh Kalantar-Zadeh, Sam C. Scholten, Islay O. Robertson, Alexander J. Healey, Jean-Philippe Tetienne, Teng Lu, Yun Liu, Aaron Elbourne, Torben Daeneke, Anthony Holland, Salvy P. Russo, Yongxiang Li, Ali Zavabeti
Advanced Functional Materials  Published: 19 September 2023
DOI:https://doi.org/10.1002/adfm.202307348

ウェアラブルデバイスが指の曲げ伸ばしで記憶と電源を作る(Wearable device makes memories and powers up with the flex of a finger)

Abstract

Atomically thin, mechanically flexible, memory-functional, and power-generating crystals play a crucial role in the technological advancement of portable devices. However, the adoption of these crystals in such technologies is sometimes impeded by expensive and laborious synthesis methods, as well as the need for large-scale, mechanically stable, and air-stable materials. Here, an instant-in-air liquid metal printing process utilizing liquid bismuth (Bi) is presented, forming naturally occurring, air-stable, atomically thin, mechanically flexible nanogenerators and ferroelectric oxides. Despite the centrosymmetric nature of the monoclinic P21/c system of achieved α-Bi2O3-δ the high kinetics of liquid metal synthesis leads to the formation of vacancies that disrupt the symmetry which is confirmed by density functional theory (DFT) calculations. The polarization switching is measured and utilized for ferroelectric nanopatterning. The exceptional attributes of these atomically thin multifunctional stable oxides, including piezoelectricity, mechanical flexibility, and polarizability, present significant opportunities for developing nano-components that can be seamlessly integrated into a wide range of devices.

0402電気応用
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