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Ferroelectric 2D ice under graphene confinement. | LitMetric

AI Article Synopsis

  • - Researchers observed ferroelectric properties in a 2D phase of water ice, created by confining it between two graphene layers at room temperature, demonstrating a strong, permanent dipole influenced by external electric fields.
  • - They found that for ferroelectric ordering to occur, a monolayer of 2D ice is necessary, with findings supported by both simulations and tests on water's partial pressure and temperature.
  • - The unique properties of this 2D ice allow for the development of new nanoelectromechanical devices with memory capabilities, showing significant switching performance and durability without degradation over numerous cycles.

Article Abstract

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 10, 4 bit storage capabilities and no degradation after 10,000 switching cycles.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8560911PMC
http://dx.doi.org/10.1038/s41467-021-26589-xDOI Listing

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