Advanced Functional Materials
© WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Editor-in-Chief: Joern Ritterbusch, Deputy Editors: Mary De Vita, Yan Li, Hakim Meskine
Online ISSN: 1616-3028
Associated Title(s): Advanced Electronic Materials, Advanced Energy Materials, Advanced Engineering Materials, Advanced Healthcare Materials, Advanced Materials, Advanced Materials Interfaces, Advanced Materials Technologies, Advanced Optical Materials, Advanced Science, Particle & Particle Systems Characterization, Small
Stimuli-Responsive Materials: Light-Controlled Reversible Manipulation of Microgel Particle Size Using Azobenzene-Containing Surfactant (Adv. Funct. Mater. 23/2012)
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.