Laser-assisted fabrication of deterministic lateral displacement structures on P20 die steel masters for microfluidic particle separation

Design and fabrication of a polydimethylsiloxane device for evaluating the effect of pillar geometry and configuration in the flow separation using deterministic lateral displacement

“…The zero velocity zones are observed at the walls of the circular pillars. 29 The recovery factor in these devices is also dependent on the congurations, it is seen that the recovery rate varied from 44% to 81%, and C-35 and T-30 result in the highest recovery factor when the pillars with the pointed vertices are considered. The recovery factors for the devices with pillars having rounded vertices were found to vary between 74% and 100%, this suggests that the rounded triangular micropillars provided a higher recovery in comparison to the pointed micropillars.…”

“…In our previous study, the P20 die steel moulds were prepared using femtosecond lasers to fabricate PDMS-based microchannels with DLD structures. 29 Thus, the current structures are fabricated considering the limitations of laser micromachining in fabricating the DLD structures.…”