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. 2018 Mar 14;15(140):20170868. doi: 10.1098/rsif.2017.0868

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© 2018 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 5. — (a) Snapshots of a water drop falling at the critical tilting for R = 3.75 mm. (b) Experimentally determined critical tilting angle, θ_c, as a function of κR with N = 9 ribs. Inset: definition of θ_c. (c) Schematic illustration of the pipetting process using our device motivated by liverwort. (d) The rescaled (maximum) grabbed mass, m/ρR³ (open symbol) and the rescaled mass dropped at the critical tilting, m_drop/ρR³ (filled symbol), plotted as a function of the shape parameter Φ for R = 3.125 mm (box) and for R = 3.75 mm (circle) with N = 9. (e) Pipetting efficiency χ = m × m_drop/(ρR³)² as a function of Φ. The data and the symbol legend are the same as in (d). All data shown here are obtained for tap water. (Online version in colour.)