| 초록 |
This study introduces a robust and straightforward approach to synthesize highly uniform conducting Janus magnetic microparticles, in which monodisperse W/O emulsion drops produced in a glass-based microfluidic device are used as templates. Controlled aggregation of magnetic Fe3O4 NPs within the emulsion drops is induced by the depletion force. The magnetic Fe3O4 NPs-separated hydrogel precursor drops are consecutively solidified using photo-polymerization, thus producing Janus magnetic microparticles. To give conductivity to the particles, we alternatively coat them with PEDOT-PSS layers by using the layer-by-layer deposition. Then, 2D forced colloidal array enables the precision registry of our Janus magnetic microparticles on the target position. Finally we show that our particle system displays a pressure sensing performance with excellent sensitivity and repeatability. |
