| 초록 |
2D arrays of colloidal particles have been extensively investigated owing to their great potentials in optical, biological, and physicochemical sensors. This study introduces a facile and straightforward approach for fabrication of Janus microparticles for 2D patterned colloidal array. For this, we generate uniform biphasic emulsion templates, consisting of a hydrogel precursor and a polyurethane prepolymer, in a microfluidic device. In principle, tuning the spreading coefficient for the biphasic emulsion drop allows us to selectively produce core-shell and Janus dumbbell configuration. Consecutive UV irradiation leads to production of uniform PEG/PU biphasic Janus microparticles. Finally, we show that a successful 2D array can be conducted on a pattered stencil substrate by simply changing their asymmetric colloidal geometry. |
