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Poulsen, Carl Esben
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Publications (5/5 displayed)
- 2016All-polymer microfluidic systems for droplet based sample analysis:Bringing droplet technologies to life: Bridging the gap between academia and industry
- 2016Laser ablated micropillar energy directors for ultrasonic welding of microfluidic systemscitations
- 2016MICRO-SCALE ENERGY DIRECTORS FOR ULTRASONIC WELDING
- 2015Ultrasonic welding for fast bonding of self-aligned structures in lab-on-a-chip systemscitations
- 2014Fabrication and modelling of injection moulded all-polymer capillary microvalves for passive microfluidic controlcitations
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article
Laser ablated micropillar energy directors for ultrasonic welding of microfluidic systems
Abstract
We present a new type of energy director (ED) for ultrasonic welding of microfluidic systems. These micropillar EDs are based on the replication of cone like protrusion structures introduced using a pico-second laser and may therefore be added to any mould surface accessible to a pico-second laser beam. The technology is demonstrated on an injection moulded microfluidic device featuring high-aspect ratio (h × w = 2000 μm × 550 μm) and free-standing channel walls, where bonding is achieved with no detectable channel deformation. The bonding strength is similar to conventional EDs and the fabricated system can withstand pressures of over 9.5 bar.