| 초록 |
Sequence specific interactions of nucleic acids are powerful surface ligands on nanoparticles for program colloidal nanoparticle crystallizations. Various crystal composition, lattice parameters, and crystal habits could be generated and tailored. However, their practical uses are limited due to the relatively weak linkages (DNA hybridization), which are sensitive to the environment. A post-synthetic method relies on Ag+ ions to stabilize the particle connecting DNA duplexes within the crystal lattice, essentially transforming them from loosely bound structures to ones with very strong interparticle links. Such crystals do not dissociate as a function of temperature like normal DNA or DNA-interconnected superlattices, and they can be moved from water to organic media or the solid state, and stay intact. This poste-synthetic approach enables the isolation of large batch of the colloidal single crystals in a pure powder form without matrix. |
