title: Placement and orientation of individual DNA shapes on lithographically patterned surfaces.
abstract: Artificial DNA nanostructures show promise for the organization of functional materials to create nanoelectronic or nano-optical devices. DNA origami, in which a long single strand of DNA is folded into a shape using shorter 'staple strands', can display 6-nm-resolution patterns of binding sites, in principle allowing complex arrangements of carbon nanotubes, silicon nanowires, or quantum dots. However, DNA origami are synthesized in solution and uncontrolled deposition results in random arrangements; this makes it difficult to measure the properties of attached nanodevices or to integrate them with conventionally fabricated microcircuitry. Here we describe the use of electron-beam lithography and dry oxidative etching to create DNA origami-shaped binding sites on technologically useful materials, such as SiO(2) and diamond-like carbon. In buffer with approximately 100 mM MgCl(2), DNA origami bind with high selectivity and good orientation: 70-95% of sites have individual origami aligned with an angular dispersion (+/-1 s.d.) as low as +/-10 degrees (on diamond-like carbon) or +/-20 degrees (on SiO(2)).
authors.affiliation: IBM Almaden Research Center, San Jose, California 95120, USA.
authors.forename: Ryan J
authors.initials: RJ
authors.lastname: Kershner
authors.forename: Luisa D
authors.initials: LD
authors.lastname: Bozano
authors.forename: Christine M
authors.initials: CM
authors.lastname: Micheel
authors.forename: Albert M
authors.initials: AM
authors.lastname: Hung
authors.forename: Ann R
authors.initials: AR
authors.lastname: Fornof
authors.forename: Jennifer N
authors.initials: JN
authors.lastname: Cha
authors.forename: Charles T
authors.initials: CT
authors.lastname: Rettner
authors.forename: Marco
authors.initials: M
authors.lastname: Bersani
authors.forename: Jane
authors.initials: J
authors.lastname: Frommer
authors.forename: Paul W K
authors.initials: PW
authors.lastname: Rothemund
authors.forename: Gregory M
authors.initials: GM
authors.lastname: Wallraff
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D004247:DNA / Q000737:chemistry* / Q000648:ultrastructure*; D004583:Electrons; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D009690:Nucleic Acid Conformation; D010084:Oxidation-Reduction; D013499:Surface Properties
chemical_list: D001672:Biocompatible Materials; D004247:DNA