title: Topotactic interconversion of nanoparticle superlattices.
abstract: The directed assembly of nanoparticle building blocks is a promising method for generating sophisticated three-dimensional materials by design. In this work, we have used DNA linkers to synthesize nanoparticle superlattices that have greater complexity than simple binary systems using the process of topotactic intercalation-the insertion of a third nanoparticle component at predetermined sites within a preformed binary lattice. Five distinct crystals were synthesized with this methodology, three of which have no equivalent in atomic or molecular crystals, demonstrating a general approach for assembling highly ordered ternary nanoparticle superlattices whose structures can be predicted before their synthesis. Additionally, the intercalation process was demonstrated to be completely reversible; the inserted nanoparticles could be expelled into solution by raising the temperature, and the ternary superlattice could be recovered by cooling.
authors: Department of Chemistry, 2145 Sheridan Road, Evanston, IL 60208, USA.
authors: Robert J
authors: RJ
authors: Macfarlane
authors: Matthew R
authors: MR
authors: Jones
authors: Byeongdu
authors: B
authors: Lee
authors: Evelyn
authors: E
authors: Auyeung
authors: Chad A
authors: CA
authors: Mirkin
mesh_terms: D004247:DNA / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles / Q000737:chemistry*; D053838:Scattering, Small Angle; D014961:X-Ray Diffraction
chemical_list: D004247:DNA