Dielectric and phase behaviors of blue-phase liquid crystals

Sheng Chieh Chen, Po Chang Wu, Wei Lee*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Dielectric spectra of two pristine blue-phase liquid crystals and a polymer-stabilized counterpart were acquired at various temperatures in conjunction with simultaneous observations of their optical transmission spectra and birefringent textures. The temperature-dependent dielectric data at 5.5 kHz were specifically retrieved for further examination of the feasibility of the dielectric technique as a means to identify phase transitions. With complementary identification by optical images at specific temperatures, it is suggested that investigations of the second derivative of the real-part permittivity with respect to the temperature can be considered as one of the applicable ways to depict the phase sequence of the blue-phase liquid crystals on the cooling process from the isotropic phase through the chiral nematic phase.

Original languageEnglish
Pages (from-to)2392-2400
Number of pages9
JournalOptical Materials Express
Issue number11
StatePublished - 1 Jan 2014

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