Advertisement

Stimuli-Responsive Materials: Light-Controlled Reversible Manipulation of Microgel Particle Size Using Azobenzene-Containing Surfactant (Adv. Funct. Mater. 23/2012)

Authors

  • Yuriy Zakrevskyy,

    Corresponding author
    1. Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24/25, 14476 Potsdam, Germany
    • Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24/25, 14476 Potsdam, Germany.
    Search for more papers by this author
  • Marcel Richter,

    1. Applied Physical Chemistry, Institute of Chemistry, Technical University Berlin, Straße des 17. Juni 124, 10623 Berlin, Germany
    Search for more papers by this author
  • Svitlana Zakrevska,

    1. Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24/25, 14476 Potsdam, Germany
    Search for more papers by this author
  • Nino Lomadze,

    1. Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24/25, 14476 Potsdam, Germany
    Search for more papers by this author
  • Regine von Klitzing,

    1. Applied Physical Chemistry, Institute of Chemistry, Technical University Berlin, Straße des 17. Juni 124, 10623 Berlin, Germany
    Search for more papers by this author
  • Svetlana Santer

    1. Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24/25, 14476 Potsdam, Germany
    Search for more papers by this author

Abstract

original image

As reported by Yuriy Zakrevskyy and co-workers on page 5000, all-optical reversible control of the swelling/contraction transition of a microgel is realized using an azobenzene-containing surfactant. The azobenzene unit is switched between the more hydrophobic trans (blue light) and the more hydrophilic cis (UV light) state, which alters the surfactant's affinity to the microgel. The trans-surfactant binds to the gel triggering its contraction and the cissurfactant unbinds leading to microgel swelling.

Ancillary