What is it about?
Laser pulses can form bubbles in liquid. If the liquid is contained in a small flexible PDMS micro channel, the walls of the channel deform. How much can PDMS stand these cycles of expansion and collapse?
Why is it important?
PDMS has been used, and it seems it will continue to be used, widely in the scientific community busy in microfluidics and other fields. Biologist, fluid dynamicists, chemists, etc. use it for all types of purposes. This was a small study about the material's property regarding bubble cavitation events in confinement. Ideally the results and cited references can help others in their research.
Read the Original
This page is a summary of: On the Resilience of PDMS Microchannels After Violent Optical Breakdown Microbubble Cavitation, January 2008, ASME International, DOI: 10.1115/icnmm2008-62385.
You can read the full text:
Video of laser generated bubble in a PDMS channel
Recorded with a Shimadzu camera at 250 000 fps Energy of the Laser 1.5 mJ Att 400 Trigger 0.0005 Pulse Duration 0.0001 Date 07 - 01 - 2007 Conditions Using PDMS chips bonded with Glass. A big bubble is generated. VIOLENT COLLAPSE. Dirt in between the PDMS and glass makes a "short" detachment. David Fernandez Rory Dijkink Chao Sun
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