Abstract
A new microcapsule generation technique is presented. The microcapsule system has been built based on conventional flow cytometry. The results show that the current system can control the jet diameters of each component solution comprising a compound jet, in addition to the resultant microcapsule diameter, using the pressure balance between adjacent fluids in the hydrodynamic focusing region. It has been also shown that the synchronized breakup of the compound jet is critical for the reservoir-type morphology of the microcapsules.