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Assessment of Pressure and Density of Confined Water in Graphene Liquid Cells
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2020-05-10 , DOI: 10.1002/admi.201901727 Seyed Mohammadreza Ghodsi 1 , Soroosh Sharifi‐Asl 2 , Pavel Rehak 3 , Petr Král 3, 4 , Constantine M. Megaridis 2 , Reza Shahbazian‐Yassar 2 , Tolou Shokuhfar 1
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2020-05-10 , DOI: 10.1002/admi.201901727 Seyed Mohammadreza Ghodsi 1 , Soroosh Sharifi‐Asl 2 , Pavel Rehak 3 , Petr Král 3, 4 , Constantine M. Megaridis 2 , Reza Shahbazian‐Yassar 2 , Tolou Shokuhfar 1
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Understanding the behavior of confined matter within Van der Waals (VdW) materials is complicated due to the interplay of various factors, including the VdW interaction between the interlayers, the layer interaction with the matter, and the bending strain energy of the layers to accommodate encapsulation. Herein, new insight on the magnitude of pressure and density of water entrapped within confined spaces in VdW materials is provided. This is accomplished by studying the plasmon excitation of water encapsulated between two sheets of graphene membranes in an aberration‐corrected scanning transmission electron microscope. The results indicate ≈12% maximum increase in the density of water under tight graphene encasement, where pressure as high as 400 MPa is expected. The pressure estimation from theoretical analysis considering the effect of VdW forces, Laplace pressure, and strain energy is in agreement with the experimental results. The findings of this work open new opportunities to explore the local physical state of not only water but also other liquid materials under high pressure with imaging and analytical resolutions never achieved before.
中文翻译：
石墨烯液体电池中承压水的压力和密度的评估
由于各种因素的相互作用，包括范德华之间的VdW相互作用，层与物质的相互作用以及层的弯曲应变能（以适应封装），了解范德华（VdW）材料中受限物质的行为十分复杂。 。在此，提供了对VdW材料中密闭空间内截留的水的压力大小和密度的新见解。这是通过在像差校正的扫描透射电子显微镜中研究封装在两片石墨烯膜之间的水的等离子体激元激发来实现的。结果表明，在紧密的石墨烯包裹下，预计压力高达400 MPa，水的密度最大增加≈12％。考虑VdW力，拉普拉斯压力和应变能影响的理论分析得出的压力估算值与实验结果相符。这项工作的发现为探索高压下的水和其他液态物质的局部物理状态提供了新的机会，而这些成像和分析分辨率从未达到过。
更新日期：2020-05-10
中文翻译：
石墨烯液体电池中承压水的压力和密度的评估
由于各种因素的相互作用，包括范德华之间的VdW相互作用，层与物质的相互作用以及层的弯曲应变能（以适应封装），了解范德华（VdW）材料中受限物质的行为十分复杂。 。在此，提供了对VdW材料中密闭空间内截留的水的压力大小和密度的新见解。这是通过在像差校正的扫描透射电子显微镜中研究封装在两片石墨烯膜之间的水的等离子体激元激发来实现的。结果表明，在紧密的石墨烯包裹下，预计压力高达400 MPa，水的密度最大增加≈12％。考虑VdW力，拉普拉斯压力和应变能影响的理论分析得出的压力估算值与实验结果相符。这项工作的发现为探索高压下的水和其他液态物质的局部物理状态提供了新的机会，而这些成像和分析分辨率从未达到过。
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