Figure 1
From: Hydrodynamic particle focusing enhanced by femtosecond laser deep grooving at low Reynolds numbers
Femtosecond pulse laser engraved glass surficial microstructures for particle focusing in a microchannel. (a) Schematic illustration of the laser engraving system. (b) Schematic illustration of the microfluidic device for continuous focusing of microparticles. (c) SEM images of top and bird’s-eye views of the grooves engraved by four different pulse energies: 0.7, 1.4, 2.1 and 2.8 µJ/pulse. (d) Plots of width and depth of grooves against the engraving pulse energy.
