title: Epitaxial growth of DNA-assembled nanoparticle superlattices on patterned substrates.
abstract: DNA-functionalized nanoparticles, including plasmonic nanoparticles, can be assembled into a wide range of crystalline arrays via synthetically programmable DNA hybridization interactions. Here we demonstrate that such assemblies can be grown epitaxially on lithographically patterned templates, eliminating grain boundaries and enabling fine control over orientation and size of assemblies up to thousands of square micrometers. We also demonstrate that this epitaxial growth allows for orientational control, systematic introduction of strain, and designed defects, which extend the range of structures that can be made using superlattice assembly. Ultimately, this will open the door to integrating self-assembled plasmonic nanoparticle materials into on-chip optical or optoelectronic platforms.
authors.affiliation: Kavli Nanoscience Institute, California Institute of Technology , Pasadena, California 91125, United States.
authors.forename: Sondra L
authors.initials: SL
authors.lastname: Hellstrom
authors.forename: Youngeun
authors.initials: Y
authors.lastname: Kim
authors.forename: James S
authors.initials: JS
authors.lastname: Fakonas
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Senesi
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Macfarlane
authors.forename: Chad A
authors.initials: CA
authors.lastname: Mirkin
authors.forename: Harry A
authors.initials: HA
authors.lastname: Atwater
mesh_terms: D004247:DNA / Q000737:chemistry*; D006046:Gold / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry; D055095:Optics and Photonics
chemical_list: D006046:Gold; D004247:DNA