Phase ordering of the liquid crystalline 'B7' phase by analysis of fractal growth patterns

I. Dierking, H. Sawade, G. Heppke

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The phase ordering process of bent-core mesogenic molecules is qualitatively different from that observed for conventional rod-like (calamitic) mesogens. Fractal dimensional analysis can be employed to characterize the phase ordering process of these unconventional mesogens. The phase transition between the isotropic melt and the liquid crystalline 'B7' phase of a 'banana-molecule' material has been investigated in terms of fractal growth patterns, with respect to sample thickness and rate of temperature change. It is shown, that there is a crossover from confinement dominated phase growth to volume behaviour, while the cooling rate has no influence on the dimension of the fractal patterns observed during the phase ordering process.
    Original languageEnglish
    Pages (from-to)1767-1773
    Number of pages6
    JournalLiquid Crystals
    Volume28
    Issue number12
    DOIs
    Publication statusPublished - 2001

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