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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 (CC BY 3.0).
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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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