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Materials 2009, 2(3), 1305-1322; doi:10.3390/ma2031305
Article

Photo-Induced Phase Transitions to Liquid Crystal Phases: Influence of the Chain Length from C8E4 to C14E4

* ,
,
 and
*
Department of Structural Dynamics of (Bio)chemical Systems, Max Planck Institute for Biophysical Chemistry, 37070 Göttingen, Germany
* Authors to whom correspondence should be addressed.
Received: 28 August 2009 / Revised: 14 September 2009 / Accepted: 16 September 2009 / Published: 17 September 2009
(This article belongs to the Special Issue Liquid Crystals)
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Abstract

Photo-induced phase transitions are characterized by the transformation from phase A to phase B through the absorption of photons. We have investigated the mechanism of the photo-induced phase transitions of four different ternary systems CiE4/alkane (i) with n = 8, 10, 12, 14; cyclohexane/H2O. We were interested in understanding the effect of chain length increase on the dynamics of transformation from the microemulsion phase to the liquid crystal phase. Applying light pump (pulse)/x-ray probe (pulse) techniques, we could demonstrate that entropy and diffusion control are the driving forces for the kind of phase transition investigated.
Keywords: photo-induced phase-transition; time-resolved; small angle x-ray scattering (SAXS); self-assembly; entropy-driven photo-induced phase-transition; time-resolved; small angle x-ray scattering (SAXS); self-assembly; entropy-driven
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Petri, M.; Busse, G.; Quevedo, W.; Techert, S. Photo-Induced Phase Transitions to Liquid Crystal Phases: Influence of the Chain Length from C8E4 to C14E4. Materials 2009, 2, 1305-1322.

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