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