Study on the Influence of Fs-laser Power on the Entrance Morphology of Vessel Microfluidic Chips

摘要

The law of energy conservation and the heat conduction equation were used to study theinfluence characteristics of the fs-laser power density on the entrance morphology of vesselmicro-channels. Meanwhile, PMMA basis material of fs-laser irradiation was studied in this research,and the theoretical analysis model was established to deduce the relational expression between laserpower and the melting temperature of PMMA basis material. The finite element software wasadopted to make a simulation analysis of the temperature field changes of PMMA basis material atmicro-channel entrance when the fs-laser was set at different powers. In addition, the ultra-fielddepth digital 3D microscope, scanning electronic microscope (herein referred to as SEM) and whitelight interferometer were also used to test and analyze the influence of fs-laser at different powers on themorphological and structural characteristics of the post-irradiation PMMA basis material. Test resultsshowed that: PMMA melting conditions could be satisfied but the thermal conditions could not be metat the laser power (1W) and the spot radius (1mm). The processed micro-channel entrance was roundand good in surface quality.