Figure 4: Manipulating droplet motion on a Chlorin dye-sensitized TiO2 surface.
From: Visible light guided manipulation of liquid wettability on photoresponsive surfaces
(a (i)–(iii)) A sequence of images showing visible light guided movement of a droplet of sodium chloride (NaCl, 10 wt% in water) on a patterned Chlorin dye-sensitized TiO2 surface. Scale bar, 1 cm. ((iv)–(vi)) Sequential images captured from contact angle goniometry of anisotropic wetting of an NaCl droplet (9 μl) upon focused visible light illumination. Scale bar, 2 mm. (b) Sequential images of photo-induced coalescence of multiple NaCl droplets placed on a Chlorin dye-sensitized TiO2 surface submerged in dodecane. Scale bar, 1 cm.
