| 초록 |
DNA colloids are promising materials that is programmable by designing sequences and thereby deriving sequence specific self-assembly. Stretching, shrinking, folding or melting of DNA duplexes of self-assembled DNA colloid suprastructures can change their shapes or structures which offers great opportunities for designing functional materials. Here, I report the formation of micro-patterned, multi-layered DNA-gold nanoparticle thin film made by Layer-by-Layer (LbL) process. By controlling the binding energy of DNA duplexes, freestanding DNA-GNP films are liberated from the substrate, and then the shape of DNA-GNP thin film is controlled by reversible DNA hybridization. DNA-GNP microstructure is actuated by active DNA-GNP layer whose volume can be reversibly modulated by DNA hybridization of a single stranded gap domain bridging between particles. As a result, bilayer DNA-GNP microstructure with active and passive layers shows reversible folding by DNA hybridization. Finally, dual active DNA-GNP microstructure show programmed folding by independently addressable DNA hybridizations. |
