Evaporation dynamics of femtoliter water capillary bridges

ORAL

Abstract

Capillary bridges are usually formed by a small liquid volume in confined space between two solid surfaces and particularly they have lower internal pressure than 1 atm at femtoliter scales. Femtoliter capillary bridges exhibit rapid evaporation rates. To quantify detailed evaporation kinetics of femtoliter bridges, we present a feasible protocol to directly visualize femtoliter water bridges that evaporate in still air between a microsphere and a flat substrate by utilizing transmission X-ray microscopy. Precise measurements of evaporation kinetics for water bridges indicate that lower water pressure than 1 atm can significantly decelerate evaporation by suppression of vapor diffusion. This finding would provide a consensus to understand evaporation of ultrasmall capillary bridges. \newline

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Authors

  • Kun Cho

    School of Advanced Materials Science and Engineering, Sungkyunkwan University

  • In Gyu Hwang

    School of Advanced Materials Science and Engineering, Sungkyunkwan University

  • Yeseul Kim

    SKKU Advanced Institute of Nanotechnology(SAINT), Sungkyunkwan University, SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, School of Advanced Materials Science and Engineering, Sungkyunkwan University

  • Su Jin Lim

    SKKU Advanced Institute of Nanotechnology(SAINT), Sungkyunkwan University, SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, School of Advanced Materials Science and Engineering, Sungkyunkwan University

  • Jun Lim

    Beamline Division, Pohang Light Source

  • Joon Heon Kim

    Advanced Photonics Research Institute (APRI), Gwangju Institute of Science and Technology (GIST)

  • Bopil Gim

    Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST)

  • Jung Gu Kim

    School of Advanced Materials Science and Engineering, Sungkyunkwan University

  • Byung Mook Weon

    SKKU Advanced Institute of Nanotechnology(SAINT), Sungkyunkwan University, School of Advanced Materials Science and Engineering, SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, School of Advanced Materials Science and Engineering, Sungkyunkwan University