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      Energy Stored in Nanoscale Water Capillary Bridges between Patchy Surfaces.

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          Abstract

          We perform molecular dynamics (MD) simulations of a water capillary bridge (WCB) expanding between two identical chemically heterogeneous surfaces. The model surfaces, based on the structure of silica, are hydrophobic and are decorated by a hydrophilic (hydroxylated silica) patch that is in contact with the WCB. Our MD simulations results, including the WCB profile and forces induced on the walls, are in agreement with capillarity theory even at the smallest wall separations studied, h = 2.5-3 nm. Remarkably, the energy stored in the WCB can be relatively large, with an energy density that is comparable to that harvested by water-responsive materials used in actuators and nanogenerators.

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          Author and article information

          Journal
          Langmuir
          Langmuir : the ACS journal of surfaces and colloids
          American Chemical Society (ACS)
          1520-5827
          0743-7463
          Jul 07 2020
          : 36
          : 26
          Affiliations
          [1 ] International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China.
          [2 ] Department of Physics, Yeshiva University, 500 West 185th Street, New York, New York 10033, United States.
          [3 ] Collaborative Innovation Center of Quantum Matter, Beijing 100000, China.
          [4 ] Department of Physics, Brooklyn College of the City University of New York, Brooklyn, New York 11210, United States.
          [5 ] Ph.D. Programs in Chemistry and Physics, The Graduate Center of the City University of New York, New York, New York 10016, United States.
          Article
          10.1021/acs.langmuir.0c00549
          32460499
          ad73a510-9f3e-42f2-a718-1c469ae848a2
          History

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