title: Crystalline Gibbs monolayers of DNA-capped nanoparticles at the air-liquid interface.
abstract: Using grazing-incidence small-angle X-ray scattering in a special configuration (parallel SAXS, or parSAXS), we mapped the crystallization of DNA-capped nanoparticles across a sessile droplet, revealing the formation of crystalline Gibbs monolayers of DNA-capped nanoparticles at the air-liquid interface. We showed that the spatial crystallization can be regulated by adjusting both ionic strength and DNA sequence length and that a modified form of the Daoud-Cotton model could describe and predict the resulting changes in interparticle spacing. Gibbs monolayers at the air-liquid interface provide an ideal platform for the formation and study of equilibrium nanostructures and may afford exciting routes toward the design of programmable 2D plasmonic materials and metamaterials.
authors: Department of Biomedical Engineering, Cornell University, Ithaca, New York 14853, United States.
authors: Michael J
authors: MJ
authors: Campolongo
authors: Shawn J
authors: SJ
authors: Tan
authors: Detlef-M
authors: DM
authors: Smilgies
authors: Mervin
authors: M
authors: Zhao
authors: Yi
authors: Y
authors: Chen
authors: Iva
authors: I
authors: Xhangolli
authors: Wenlong
authors: W
authors: Cheng
authors: Dan
authors: D
authors: Luo
mesh_terms: D000388:Air; D003460:Crystallization; D004247:DNA / Q000737:chemistry*; D008958:Models, Molecular; D053758:Nanoparticles / Q000737:chemistry*; D009690:Nucleic Acid Conformation; D009994:Osmolar Concentration
chemical_list: D004247:DNA