| 초록 |
This study introduces a facile and straightforward approach for fabrication of Janus microdumbbell particles of which shape anisotropy is exactly controlled. Monodisperse biphasic emulsion templates, consisting of a hydrogel precursor and a polyurethane precursor, were generated in a microfluidic device. Tuning the spreading coefficient between phases led to dumbbell drop configuration. The degree of Janusity of the particles was regulated by changing the flow rates of the two dispersion fluids that were injected from a theta shaped capillary. Consecutive photo-polymerization led to Janus microparticles. We then positioned the Janus microparticles on a patterned stencil, thus displaying the colloidal registry on the targeted position. This enables us to develop a new technology useful for 2D patterning of particles, eventually leading to the micro-writing technology. |
