title: A polycatenated DNA scaffold for the one-step assembly of hierarchical nanostructures.
abstract: A unique DNA scaffold was prepared for the one-step self-assembly of hierarchical nanostructures onto which multiple proteins or nanoparticles are positioned on a single template with precise relative spatial orientation. The architecture is a topologically complex ladder-shaped polycatenane in which the "rungs" of the ladder are used to bring together the individual rings of the mechanically interlocked structure, and the "rails" are available for hierarchical assembly, whose effectiveness has been demonstrated with proteins, complementary DNA, and gold nanoparticles. The ability of this template to form from linear monomers and simultaneously bind two proteins was demonstrated by chemical force microscopy, transmission electron microscopy, and confocal fluorescence microscopy. Finally, fluorescence resonance energy transfer between adjacent fluorophores confirmed the programmed spatial arrangement between two different nanomaterials. DNA templates that bring together multiple nanostructures with precise spatial control have applications in catalysis, biosensing, and nanomaterials design.
authors.affiliation: Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
authors.forename: Yossi
authors.initials: Y
authors.lastname: Weizmann
authors.forename: Adam B
authors.initials: AB
authors.lastname: Braunschweig
authors.forename: Ofer I
authors.initials: OI
authors.lastname: Wilner
authors.forename: Zoya
authors.initials: Z
authors.lastname: Cheglakov
authors.forename: Itamar
authors.initials: I
authors.lastname: Willner
mesh_terms: D000327:Adsorption; D043864:DNA, Catenated / Q000138:chemical synthesis*; D004277:DNA, Single-Stranded; D046529:Microscopy, Electron, Transmission; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*
chemical_list: D043864:DNA, Catenated; D004277:DNA, Single-Stranded