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Stimuli‐Responsive Materials: Light‐Controlled Reversible Manipulation of Microgel Particle Size Using Azobenzene‐Containing Surfactant (Adv. Funct. Mater. 23/2012)
Author(s) -
Zakrevskyy Yuriy,
Richter Marcel,
Zakrevska Svitlana,
Lomadze Nino,
von Klitzing Regine,
Santer Svetlana
Publication year - 2012
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201290143
Subject(s) - azobenzene , pulmonary surfactant , materials science , swelling , chemical engineering , contraction (grammar) , particle size , photochemistry , polymer chemistry , composite material , polymer , chemistry , engineering , medicine
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.