title: Temperature dependent cubic and hexagonal close packing in micellar structures.
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.
authors.affiliation: Crystallography and Structural Physics, University of Erlangen-Nürnberg, 91058 Erlangen, Germany.
authors.forename: Nicole
authors.initials: N
authors.lastname: Wolff
authors.forename: Stefan
authors.initials: S
authors.lastname: Gerth
authors.forename: Philipp
authors.initials: P
authors.lastname: Gutfreund
authors.forename: Max
authors.initials: M
authors.lastname: Wolff