Fig. 7: Optical drive for VSe2 nanosheets at the frequency of 1 Hz.
From: Photoacoustic 2D actuator via femtosecond pulsed laser action on van der Waals interfaces

a, b The state of VSe2 nanosheets at 0 min and 5 min. The arrows represent the moving direction from 0 to 5 min. The laser source is the fs pulsed laser at 1040 nm with the repetition frequency of 1 Hz (See Supplementary Movie 3).