Fig. 9
Stepwise bending of a thin plate-like crystal of enol-(S)-1 upon photoirradiation. a–g Snapshots of the stepwise bending from the side view of the plate-like crystal (Supplementary Movie 3). a, b Fast bending with twisting of the β-phase upon ultraviolet (UV) light irradiation. c Sudden disappearance of the twist due to the photo-triggered phase transition β → γ. d Bending without twist of the γ-phase under UV light irradiation. e Thermal relaxation of the bending without twist in the γ-phase. f Gradual appearance of twist due to the reverse phase transition γ → β. g Returning to the initial shape at the β-phase. The scale bar is 0.5 mm
