Electro-osmosis and flexo-electricity in the dowser texture

Pawel Pieranski, Maria Helena Godinho

Research output: Contribution to journalArticle

2 Citations (Scopus)


Abstract.: Due to its low symmetry, the long-lived pseudo-planar texture, dubbed “the dowser texture”, has a flexo-electric spontaneous polarisation 퐏fe. Being degenerated, the dowser texture is easily aligned by the electric torque Γ= 퐏fe× 퐄 acting on 퐏. The dowser texture can also be aligned by Poiseuille flows driven by electro-osmosis. The hydrodynamic torques due to the electro-osmotic flows are linear in 퐄 like the electrical one. It is shown that in 5CB the electro-osmotic flows can alter measurements of the flexo-electric polarisation. Graphical abstract: [Figure not available: see fulltext.].

Original languageEnglish
Article number69
JournalEuropean Physical Journal E
Issue number6
Publication statusPublished - 1 Jun 2019


  • Soft Matter: Liquid crystals

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