https://scholars.lib.ntu.edu.tw/handle/123456789/606474
標題: | Ferroelectric 2D ice under graphene confinement | 作者: | Chin H.-T Klimes J Hu I.-F Chen D.-R Nguyen H.-T Chen T.-W Ma S.-W Hofmann M Liang C.-T CHI-TE LIANG Mario Hofmann |
關鍵字: | graphene; ice; detection method; temperature effect; two-dimensional modeling; ab initio calculation; Article; chemical phenomena; controlled study; degradation; dipole; electric potential; ferroelectric ordering; measurement; molecular dynamics; partial pressure; phase transition; physical phase; polarization; room temperature; simulation; surface property | 公開日期: | 2021 | 卷: | 12 | 期: | 1 | 來源出版物: | Nature Communications | 摘要: | We here report on the direct observation of ferroelectric properties of water ice in its 2D phase. Upon nanoelectromechanical confinement between two graphene layers, water forms a 2D ice phase at room temperature that exhibits a strong and permanent dipole which depends on the previously applied field, representing clear evidence for ferroelectric ordering. Characterization of this permanent polarization with respect to varying water partial pressure and temperature reveals the importance of forming a monolayer of 2D ice for ferroelectric ordering which agrees with ab-initio and molecular dynamics simulations conducted. The observed robust ferroelectric properties of 2D ice enable novel nanoelectromechanical devices that exhibit memristive properties. A unique bipolar mechanical switching behavior is observed where previous charging history controls the transition voltage between low-resistance and high-resistance state. This advance enables the realization of rugged, non-volatile, mechanical memory exhibiting switching ratios of 106, 4 bit storage capabilities and no degradation after 10,000 switching cycles. ? 2021, The Author(s). |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85118463227&doi=10.1038%2fs41467-021-26589-x&partnerID=40&md5=1c82e7eee7ce9011c8de96a2c51fab4c https://scholars.lib.ntu.edu.tw/handle/123456789/606474 |
ISSN: | 20411723 | DOI: | 10.1038/s41467-021-26589-x |
顯示於: | 物理學系 |
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