Issue 30, 2012

Photo-induced transformation of wormlike micelles to spherical micelles in aqueous solution

Abstract

A photo-responsive system composed of an imidazolium-type surfactant 1-hexadecyl-3-methylimidazolium bromide ([C16mim]Br) and a commonly photosensitive aromatic compound trans-cinnamic acid (trans-CA) was studied through UV spectra, 1H NMR, and rheological measurements. In aqueous solution, the compounds [C16mim]Br and trans-CA can self-assemble to form viscoelastic wormlike micelles. Through UV irradiation, the CA molecules exhibit molecular photoisomerization from trans- to cis-, which results in a change of the molecular critical packing. The wormlike micelles transform into spherical micelles after UV irradiation, which is also confirmed by rheological measurements.

Graphical abstract: Photo-induced transformation of wormlike micelles to spherical micelles in aqueous solution

Article information

Article type
Paper
Submitted
30 Jan 2012
Accepted
28 May 2012
First published
28 Jun 2012

Soft Matter, 2012,8, 7858-7864

Photo-induced transformation of wormlike micelles to spherical micelles in aqueous solution

J. Li, M. Zhao, H. Zhou, H. Gao and L. Zheng, Soft Matter, 2012, 8, 7858 DOI: 10.1039/C2SM25218J

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