2024
Dynamics of fluid–structure interaction in paintbrush
S. Moon and J. Ha, Physics of Fluids 36, 112105 (2024) [pdf]
Capillary rise on rounded polygon corners of pillar and array structures
J. Ha, K. Park, and W. Jung, Physics of Fluids 36, 101701 (2024) [pdf]
Small-scale robots inspired by aquatic interfacial biolocomotion
D. Kim, C. J. Park, J.-S. Koh, and J. Ha, MRS Bulletin 49, 1 (2024) - Invited paper [pdf]
2023
Polymorphic display and texture integrated systems controlled by capillarity
J. Ha, Y. S. Kim, C. Li, J. Hwang, S. Leung, R. Siu, and S. Tawfick, Science Advances 9, eadh1321 (2023) [pdf] [NSF]
Plant cell-like tip-growing polymer precipitate with structurally embedded multistimuli sensing ability
C. J. Park, J. Ha, H.-R. Lee, K. Park, J.-Y. Sun, and H.-Y. Kim, Proceedings of the National Academy of Sciences 120, e2211416120 (2023) [pdf] [동아사이언스]
2022
Hygroresponsive movements of plants and soft actuators
K. Park, J. Ha, B. Shin, and H.-Y. Kim, in Soft Matter in Plants: From Biophysics to Biomimetics. Royal Society of Chemistry. pp. 227-240 (2022)
Swelling, Softening, and Elastocapillary Adhesion of Cooked Pasta
J. Hwang, J. Ha, R. Siu, Y. S. Kim, and S. Tawfick, Physics of Fluids 34, 042105 (2022) - Special Topics on Kitchen flows [pdf] [AIP Publishing] [EBS NEWS] [동아사이언스]
Dynamic pattern selection in polymorphic elastocapillarity
J. Ha, Y. S. Kim, R. Siu, and S. Tawfick, Soft Matter 18, 262-271 (2022) [pdf] [Cover]
2021
Coalescence of oil drops and films on micropillared substrates enabled by enhanced water drainage through pillar gaps
C. J. Park, J. Ha, J. H. Lee, and H.-Y. Kim, Soft Matter 17, 5888-5896 (2021) [pdf]
2020
Hydrodynamic elastocapillary morphing of hair bundles
J. Ha, Y. S. Kim, K. Jiang, R. Siu, and S. Tawfick, Physical Review Letters 125, 254503 (2020) [pdf] [Physics Synopsis]
Hygroresponsive coiling of seed awns and soft actuators
J. Ha, S. Choi, B. Shin, M. Lee, W. Jung, and H.-Y. Kim, Extreme Mechanics Letters 38, 100746 (2020) [pdf]
Capillarity in soft porous solids
J. Ha and H.-Y. Kim, Annual Review of Fluid Mechanics 52, 263-284 (2020) [pdf]
2019
Critical AC frequency for stable operation of electrowetting-driven optofluidic devices with polymeric electrolyte solutions
J. Park, J. Ha, K. Choi, J. Bae, and H.-Y. Kim, Journal of Mechanical Science and Technology 33, 1793-1797 (2019) [pdf]
2018
Poro-elasto-capillary wicking of cellulose sponges
J. Ha, J. Kim, Y. Jung, G. Yun, D.-N Kim, and H.-Y. Kim, Science Advances 4, eaao7051 (2018) [pdf] [Nature Research Highlights]
Hygrobot: A self-locomotive ratcheted actuator powered by environmental humidity
B. Shin, J. Ha, M. Lee, G. H. Park, T. H. Choi, K.-J. Cho, and H.-Y. Kim, Science Robotics 3, eaar2629 (2018) [pdf] [Nature Research Highlights]
2017
Capillary rise of non-aqueous liquids in cellulose sponges
J. Kim, J. Ha, and H.-Y. Kim, Journal of Fluid Mechanics 818, R2 (2017) [pdf]
2016
Interfacial waves generated by electrowetting-driven contact line motion
J. Ha, J. Park, Y. Kim, B. Shin, J. Bae, and H.-Y. Kim, Physics of Fluids 28, 102102 (2016) [pdf]