title: Ordering in Polymer Micelle-Directed Assemblies of Colloidal Nanocrystals.
abstract: Assembly of presynthesized nanocrystals by block copolymer micelles can be rationalized by the incorporation of nanocrystals into micellar coronas of constant width. As determined by quantitative analysis using small-angle X-ray scattering, high loading of small nanocrystals yields composites exhibiting order on two length scales, whereas intermediate loading of nanocrystals larger than the coronal width produces single nanocrystal networks. The resulting structures obey expectations of thermodynamically driven assembly on the nanocrystal length scale, whereas kinetically frozen packing principles dictate order on the polymer micelle length scale.
authors.affiliation: McKetta Department of Chemical Engineering, University of Texas at Austin , Austin, Texas 78712, United States.|Department of Materials Science and Engineering, University of California-Berkeley , Berkeley, California 94720, United States.
authors.forename: Gary K
authors.initials: GK
authors.lastname: Ong
authors.affiliation: Graduate Group in Applied Science & Technology, University of California-Berkeley , Berkeley, California 94720, United States.|The Molecular Foundry, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States.
authors.forename: Teresa E
authors.initials: TE
authors.lastname: Williams
authors.affiliation: McKetta Department of Chemical Engineering, University of Texas at Austin , Austin, Texas 78712, United States.
authors.forename: Ajay
authors.initials: A
authors.lastname: Singh
authors.affiliation: The Advanced Light Source, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States.
authors.forename: Eric
authors.initials: E
authors.lastname: Schaible
authors.affiliation: The Molecular Foundry, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States.
authors.forename: Brett A
authors.initials: BA
authors.lastname: Helms
authors.affiliation: McKetta Department of Chemical Engineering, University of Texas at Austin , Austin, Texas 78712, United States.
authors.forename: Delia J
authors.initials: DJ
authors.lastname: Milliron
keywords: X-ray scattering; block copolymer; composite; mesoporous; self-assembly