Fig. 7: The versatility of SEMRs.
From: Spontaneous droplet transport on shape-evolving microfiber rails
a Time-sequence images showing the continuous transport of multiple drops (2 μL) along the SEMR. b Variations in droplet transport velocity and water loss versus the number of droplets transported. c Optical images showing the transport of a 0.5 μL water droplet along the coated SEMR. In the upper image, the dashed line marks the boundary between regions with (right) and without (left) the non-hygroscopic coating. d Comparison of transport distance per droplet volume (Lt/Ω) among surfaces without external energy input. The green, red, and yellow columns indicate the reported transport performances for surfaces with wettability gradients, geometry structures, and their combinations, respectively (Supplementary Fig. S19).
