Issue 1, 2009
From the journal:

Soft Matter

Reversible light-induced critical separation†

Rico F. Tabor,a   Richard J. Oakley,a   Julian Eastoe,*a   Charl F. J. Faul,a   Isabelle Grillob  and  Richard K. Heenanc  

* Corresponding authors

a School of Chemistry, University of Bristol, Bristol, UK

b Institut Max Von Laue Paul Langevin, F-38042 Grenoble, France

c ISIS, STFC, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, Oxfordshire, UK

Abstract

A reversible, critical phase separation induced by UV light at 350 nm has been achieved by doping a small amount of photosensitive surfactant into an AOT-stabilised water-in-decane microemulsion. The initial and separated phases were analysed by small-angle neutron scattering (SANS), which suggests irradiation produces two coexisting water-in-oil microemulsions with relative droplet concentrations of 1 : 3. To better understand the effect of the photosurfactant, drop shape analysis tensiometry was used, showing a change in the effectiveness of the interfacial film under different irradiation conditions.

Graphical abstract: Reversible light-induced critical separation

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Article information

DOI
https://doi.org/10.1039/B813234H
Article type
Communication
Submitted
31 Jul 2008
Accepted
26 Sep 2008
First published
08 Oct 2008

Soft Matter, 2009,5, 78-80

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Reversible light-induced critical separation

R. F. Tabor, R. J. Oakley, J. Eastoe, C. F. J. Faul, I. Grillo and R. K. Heenan, Soft Matter, 2009, 5, 78 DOI: 10.1039/B813234H

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