From molten to frozen Janus colloidal clusters

POSTER

Abstract

Colloidal clusters self-assembled from amphiphilic Janus spheres in aqueous solutions are dynamic and interchangeable between different configurations. Here by grafting photosensitive polymeric coumarin onto one hemisphere of Janus particles, we freeze the clusters covalently by forming [2+2] cycloaddition of coumarin upon UV exposure. Monodisperse trimers and tetrahedron are harvested and used as secondary self-assembly building blocks.

Authors

  • Qian Chen

    University of Illinois at Urbana Champaign

  • Joshua Ritchey

    University of Illinois at Urbana Champaign

  • Jing Yan

    University of Illinois at Urbana Champaign

  • Jeffrey Moore

    University of Illinois at Urbana Champaign

  • Steve Granick

    University of Illinois, Department of Materials Science and Engineering, University of Illinois, University of Illinois, Department of Materials Science and Engineering, U of Illinois Urbana-Champaign, University of Illinois at Urbana Champaign, Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, University of Illinois, Urbana Champaign