Dear MEMS colleague,

I want to inject controlled pore glass beads (beads diameter: 37-74um, pore
size 500A) coated with enzyme into microfludic chamber for biosensing. I
used syringe to inject the glass beads. However, only very few glass beads
traveled to the mcirofludic chamber. Most of the beads were stuck at the
entrance of the syringe needle. Others were precipitated in the guiding
tubing. I'm wondering if there are any special syringe which can inject
dense glass beads. Or are there any other more effective ways to transport
glass beads?

Thanks in advance.

Li Wang
Ph.D. student
Mechanical Engineering Department
Carnegie Mellon University