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. 2020 Sep 16;6(38):eabc1693. doi: 10.1126/sciadv.abc1693

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Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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Fig. 5 — (A) Sequential images showing droplets ascend uphill on the platform tilted at 6°. Laser is turned on at ~−2 s. (B) Chronophotograph showing the droplet’s climbing of the vertical wall. (C) Chronophotograph showing a photo-controlled cargo carrier with four droplet wheels carrying a solid cargo. White dashed circle denotes the driving droplet. (D) Chronophotograph showing the lossless manipulation of a 20 mg ml⁻¹ FITC-BSA droplet on the photopyroelectric microfluidics platform, enhancing the maximum concentration of deliverable protein by 4000-fold. (E) Sequential images showing the detection of glycine using the fundamental fluidic operations on the platform. Photo credit: Wei Li, The University of Hong Kong.