Self-driven flow in surface grooves fabricated by femtosecond laser

The self-driven flow in microfluidic devices has attracted much attention due to its efficient, fast and convenient properties. We investigated the effect of femtosecond laser pulse overlap on the liquid flow characters in surface grooves both in experimental evidence and theoretical analysis. With the increase of the femtosecond laser pulse overlap, the speed of water flowing in grooves is increased. Both the surface granular protrusions microstructures and the surface chemical composition can influence the liquid dynamics in grooves. Femtosecond laser may have potential applications in self-driven microfluidic devices.