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Nematic twist-bend phase with nanoscale modulation of molecular orientation

Borshch, V.; Borshch, Volodymyr; Kim, Y. -K.; Gao, Min; Xiang, J.; Gao, M.; Mehl, G. H.; Imrie, Corrie; Jákli, A; Jákli, A.; Kim, Young-Ki; Panov, V. P.; Lavrentovich, Oleg; Vij, J. K.; Panov, Vitaly; Imrie, C. T.; Vij, Jagdish; Tamba, M. G.; Mehl, G. H.; Lavrentovich, O. D.; Xiang, J.

Authors

V. Borshch

Volodymyr Borshch

Y. -K. Kim

Min Gao

J. Xiang

M. Gao

G. H. Mehl

Corrie Imrie

A Jákli

A. Jákli

Young-Ki Kim

V. P. Panov

Oleg Lavrentovich

J. K. Vij

Vitaly Panov

C. T. Imrie

Jagdish Vij

M. G. Tamba

O. D. Lavrentovich

J. Xiang

Abstract

A state of matter in which molecules show a long-range orientational order and no positional order is called a nematic liquid crystal. The best known and most widely used (for example, in modern displays) is the uniaxial nematic, with the rod-like molecules aligned along a single axis, called the director. When the molecules are chiral, the director twists in space, drawing a right-angle helicoid and remaining perpendicular to the helix axis; the structure is called a chiral nematic. Here using transmission electron and optical microscopy, we experimentally demonstrate a new nematic order, formed by achiral molecules, in which the director follows an oblique helicoid, maintaining a constant oblique angle with the helix axis and experiencing twist and bend. The oblique helicoids have a nanoscale pitch. The new twist-bend nematic represents a structural link between the uniaxial nematic (no tilt) and a chiral nematic (helicoids with right-angle tilt).

Publication Date Nov 5, 2013
Journal Nature Communications
Electronic ISSN 2041-1723
Publisher Nature Publishing Group
Peer Reviewed Peer Reviewed
Volume 4
Article Number ARTN 2635
Institution Citation Borshch, V., Kim, Y. -., Xiang, J., Gao, M., Jákli, A., Panov, V. P., …Lavrentovich, O. D. (2013). Nematic twist-bend phase with nanoscale modulation of molecular orientation. Nature communications, 4, https://doi.org/10.1038/ncomms3635
DOI https://doi.org/10.1038/ncomms3635
Keywords Physical sciences, Materials science
Additional Information Copy of article published in Nature Communications v.4, 2013 at: http://dx.doi.org/10.1038/ncomms3635

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