Superelasticity of a photo-actuating chiral salicylideneamine crystal.

ABSTRACT: Superelasticity is a type of elastic response to an applied external force, caused by a phase transformation. Actuation of materials is also an elastic response to external stimuli such as light and heat. Although both superelasticity and actuation are deformations resulting from stimulus-induced stress, there is a phenomenological difference between the two with respect to whether force is an input or an output. Here, we report that a molecular crystal manifests superelasticity during photo-actuation under light irradiation. The crystal exhibits stepwise twisted actuation due to two effects, photoisomerization and photo-triggered phase transition, and the actuation behavior is simulated based on a dynamic multi-layer model. The simulation, in turn, reveals how the photoisomerization and p

SUBMITTER: Taniguchi T 

PROVIDER: S-EPMC9814393 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature