Using rather well known theory about capillary bridges between two electrodes we calculate the tensile force that can be applied to liquid metal contacts in the micrometer regime. Assuming circular symmetry, full wetting of the electrodes, and neglecting gravity, we present a brief review of the necessary theory and find numerically the forces to be in the 100μN range for liquid metals as mercury and liquid Gallium suspended between electrodes of 20μm radius.
Forces in Liquid Metal Contacts
Duggen, L, & Mátéfi-Tempfli, S. "Forces in Liquid Metal Contacts." Proceedings of the ASME 2014 12th Biennial Conference on Engineering Systems Design and Analysis. Volume 3: Engineering Systems; Heat Transfer and Thermal Engineering; Materials and Tribology; Mechatronics; Robotics. Copenhagen, Denmark. July 25–27, 2014. V003T15A004. ASME. https://doi.org/10.1115/ESDA2014-20114
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