Tribonucleation of bubbles



Journal Title

Journal ISSN

Volume Title


Proceedings of the National Academy of Sciences


We report on the nucleation of bubbles on solids that are gently rubbed against each other in a liquid. The phenomenon is found to depend strongly on the material and roughness of the solid surfaces. For a given surface, temperature, and gas content, a trail of growing bubbles is observed if the rubbing force and velocity exceed a certain threshold. Direct observation through a transparent solid shows that each bubble in the trail results from the early coalescence of several microscopic bubbles, themselves detaching from microscopic gas pockets forming between the solids. From a detailed study of the wear tracks, with atomic force and scanning electron microscopy imaging, we conclude that these microscopic gas pockets originate from a local fracturing of the surface asperities, possibly enhanced by chemical reactions at the freshly created surfaces. Our findings will be useful either for preventing undesired bubble formation or, on the contrary, for “writing with bubbles,” i.e., creating controlled patterns of microscopic bubbles.





Copyright 2014 Proceedings of the National Academy of Sciences. Recommended citation: Wildeman, Sander, Henri Lhuissier, Chao Sun, Detlef Lohse, and Andrea Prosperetti. "Tribonucleation of bubbles." Proceedings of the National Academy of Sciences 111, no. 28 (2014): 10089-10094. DOI: 10.1073/pnas.1321194111 URL: Reproduced in accordance with the original publisher’s licensing terms and with permission from the author(s).