Issue 42, 2014
From the journal:

Soft Matter

Temperature dependent cubic and hexagonal close packing in micellar structures

Nicole Wolff,a   Stefan Gerth,a   Philipp Gutfreundb  and  Max Wolff*c  

* Corresponding authors

a Crystallography and Structural Physics, University of Erlangen-Nürnberg, 91058 Erlangen, Germany

b Institut Laue-Langevin, B.P. 156, 38042 Grenoble, France

c Department of Physics and Astronomy, Uppsala University, 75121 Uppsala, Sweden
E-mail: max.wolff@physics.uu.se

Abstract

The interfacial structure and phase diagram of a micellar solution formed by the three block copolymer (EO20–PO70–EO20) also known as P123 solved in deuterated water close to a solid boundary is investigated with respect to temperature. We find a hysteretic behavior of the d-spacing of the micellar crystal and a spontaneous change in the lateral correlation length going hand in hand with a structural reorganization between cubic and hexagonal. The phase transitions may be initiated by a change in the shape of the micelles from spherical to elongated together with a minimization of the polymer water interface.

Graphical abstract: Temperature dependent cubic and hexagonal close packing in micellar structures

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Article information

DOI
https://doi.org/10.1039/C4SM01569J
Article type
Paper
Submitted
16 Jul 2014
Accepted
01 Sep 2014
First published
12 Sep 2014

Soft Matter, 2014,10, 8420-8426

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Temperature dependent cubic and hexagonal close packing in micellar structures

N. Wolff, S. Gerth, P. Gutfreund and M. Wolff, Soft Matter, 2014, 10, 8420 DOI: 10.1039/C4SM01569J

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