Orientation Control of Chromonic Nano Columns via Capillary Bridge
발표자
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초록
내용
Well-ordered chromonic nano columns composed of 1D aggregates of disc-shaped molecules in water are widely used for sensor, display, and biotechnology. Commonly, chromonic nano columns have been controlled to 1D or 2D self-assembled structure with surface modification. However, it has limitation to fabricate complex 3D structures that can be used in chiral applications with previous methods. Here, we suggested a new approach to assemble chromonic nano columns from 1D to 3D structures via the capillary bridge. When chromonic solution is injected into microcavity composed with patterned microchannel and glass substrates, capillary bridge is spontaneously generated due to inhomogeneous capillary action. Various structures of nano columns from 1D to 3D are spontaneously generated by adjusting the effect of interface of capillary bridge. This simple method can control the nano columns in large area and be applied on chiral application which have not been accessed with conventional methods.