| 초록 |
We present a flow coating technique to make various structures which is induced by an evaporative self-assembly method. This versatile method utilized the phenomenon known as a “coffee ring effect” coupled confined convective flow with controlled stick-slip motion. The evaporation rate and intended stick-slip motions determine a shape or morphology of patterns. Modification of conditions for a patterning process makes it possible to achieve micron-scale linear patterns, dewetted arrangements of polymeric materials, and particular shapes of gathered particles (v-shape, trapezoid-shape, etc). Furthermore, photonic structures that has different thickness and colors were fabricated within single-step of process. In this study, not only polymeric materials but also the other substances are adopted for functional patterns. They have potential applications for OFET, solar cells, photonic crystals and sensors without complex patterning process in a short time. |
