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. 2018 Feb 21;9:752. doi: 10.1038/s41467-018-03095-1

Fig. 4.

Fig. 4

Actuation mechanism of graphdiyne materials. a Schematic for actuation strain of graphdiyne when encountering electric stimulus. b Alkene–alkyne complex transition mechanism in one graphdiyne unit. c Linear strain of graphdiyne, graphene, and carbon nanotube films under various applied voltages by SECM method. Inset shows TEM images of the three materials. d Strain retention of theoretical value of the three materials