| 초록 |
This study reports a colloidal bioelectric sensor platform from the bottom-up approach. For the generation of monodisperse functional polymer microparticles that are used as a reversibly deformable sensing matrix, we utilize the drop-based microfluidic technology. Designed solidification of monodisperse oil-in-water emulsion drops generated by coaxial flow-focusing of immiscible fluids allows fabrication of uniform and elastomeric polyurethane microparticles. Functional nano-objects, including carbon nanotubes, conducting polymers, metal nanowires, are then layered on the surface of microparticles to form a thin functional film layer by using the layer-by-layer deposition. This combined synthetic approach employed in our study has such prominence to control the particle size, shell thickness, and composition. The functional polymer microparticles were then assembled on a hole-patterned stencil, thus allowing us to obtain uniform 2-D array of particles. Use of this array technique is so advantageous for exactly controlling the particle density, so that any signal change can be transduced by particle deformation in response to the external stress. |
