Image 2 (IMAGE)
Caption
Oxalis corniculata at its (A) open state during the daytime and (B) close state during nighttime. Left insets: Top view of its open and close states, respectively. Right insets: Unfolded and folded states of the corresponding origami structure, respectively. (C) Schematic drawing of the TOM at its unfolded state when the temperature is high and light irradiates; folded state when the temperature is low and humidity is high. The insets show the schematic dehydration and hydration in the pNIPAM hydrogel layer of the actuating unit at the unfolded and folded states. (D) Bright-field images (channel is filled with blue dye) and dark-field images (channel is filled with fluorescent dye) of TOM’s two states. Scale bars, 10 mm.
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The University of Hong Kong
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