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. 2018 Mar 26;4:2. doi: 10.1038/s41378-018-0002-9

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — a Measurements of the pumped sample volume versus time for our novel capillary pump. Solid lines are for visualization purposes only. b Capillary volumetric flow rate, Q, versus κ for the sample liquids tested in our novel capillary pump (solid markers) and in standard capillaries (hollow markers). The volumetric flow rate was determined as the ratio of the measured total pumped sample volume over the measured total pumping time. The value depicted for water is the average over ten measurements. c Zoomed view of the novel capillary pump flow rate results with the ten flow rate values for water plotted separately. The solid and dashed lines indicate the average flow rate for water and two times the standard deviation of the flow rate for water, respectively.