Trapping bubbles, removing bubbles etc. in microfluidic devices is
almost a science in itself (with many articles, patents etc.). The
simplest way is de-gassing the liquid in advance, by pumping on it and
exposing it to ultrasound. If you can accept the presence of the
bubbles, having the liquid run around it, another primitive solution you
could try is that sketched in "A unique solution for preventing clogging
of flow channels by gas bubbles", Kohnle et al, IEEE?? 2002, p. 77

http://www.imtek.de/content/pdf/public/2002/solutionpreventingcloggingfl
owbubbles.pdf

Martin

> -----Original Message-----
> I work on the microfluidic devices. I found it really
> annoying that when
> I inject the flow there will be always some air bubbles
> trapped in the
> microfluidic devices (made of PDMS and glass). Is there any
> way to get rid
> of them?