Figure 4 | Scientific Reports

Figure 4

From: Biomimetic Transferable Surface for a Real Time Control over Wettability and Photoerasable Writing with Water Drop Lens

Figure 4

Water drop as a lens.

(a) Erasable writing with water lens on ‘PVDF-10 wt.% SPO’ random fiber mat. Scale bar, 1 cm. (b) Schematic of the water lens system along with enlarged, top view of one of the spots constituting the letter ‘L’. (c) Optical micrograph of the impression made by water lens on SPO loaded PVDF fibers and film, after UV exposure. (d) PVDF-10 wt.% SPO fibers with water lenses of pure water and that loaded with silver and gold nanoparticles, before (left) and after (right) exposure to white light containing a weak part of UV. Water drop removed after exposure to light in order to show the intensity of the dark impression made by the exposure.

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