Fig. 1: Optical drive for 2D materials nanosheets on sapphire substrate.
From: Photoacoustic 2D actuator via femtosecond pulsed laser action on van der Waals interfaces
a Schematic of 2D nanosheet actuator on polished sapphire substrate. The laser direction is along z-axis, and the nanosheet moves on the x,y-plane. b Sequencing images of a VSe2 nanosheet (3.7 μm × 3.1 μm) moving on the sapphire substrate under the manipulation of the near-flat fs pulsed laser (See Supplementary Movie 1). The laser was at 1040 nm with the energy and the repetition frequency of approximately 13 nJ and 1 kHz. c Optical image of the VSe2 nanosheet. d 3D atomic force microscopy characterization of VSe2 nanosheet.
