Laser Preparing Tunable Wrinkles on the Surface of PDMS with Assistance of Pre-strain Stress
Abstract(#br)Micro directional wrinkles are widely used to functionalize the surface inside micro chips. In this paper, a nano-second laser, with the assistance of pre-strain stress, was applied to prepare tunable wrinkles on the surface of PDMS (polydimethylsiloxane). Experiments were carried out to investigate the impact of the pre-strain stress and the laser fluence on the wrinkles, like the direction and the wavelength. It was noticed that wrinkles prepared in the process grown vertically to the direction of the pre-strain stress.