Nematic Twist-Bend Phase with Nanoscale Modulation of Molecular Orientation

V. Borshch, Y K Kim, J Xiang, M. Gao, A Jakli, V P Panov, J K Vij, C T Imrie, M G Tampa, G H Mehl, O D Lavrentovich

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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).
Original languageEnglish
Article number2635
JournalNature Communications
Volume4
DOIs
Publication statusPublished - 5 Nov 2013

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Liquid Crystals
Molecular orientation
Transmission Electron Microscopy
Modulation
modulation
Molecules
helices
molecules
Nematic liquid crystals
Optical microscopy
rods
Display devices
liquid crystals
Transmission electron microscopy
microscopy
transmission electron microscopy

Cite this

Borshch, V., Kim, Y. K., Xiang, J., Gao, M., Jakli, A., Panov, V. P., ... Lavrentovich, O. D. (2013). Nematic Twist-Bend Phase with Nanoscale Modulation of Molecular Orientation. Nature Communications, 4, [2635]. https://doi.org/10.1038/ncomms3635

Nematic Twist-Bend Phase with Nanoscale Modulation of Molecular Orientation. / Borshch, V.; Kim, Y K ; Xiang, J ; Gao, M.; Jakli, A; Panov, V P ; Vij, J K ; Imrie, C T; Tampa, M G ; Mehl, G H ; Lavrentovich, O D .

In: Nature Communications, Vol. 4, 2635, 05.11.2013.

Research output: Contribution to journalArticle

Borshch, V, Kim, YK, Xiang, J, Gao, M, Jakli, A, Panov, VP, Vij, JK, Imrie, CT, Tampa, MG, Mehl, GH & Lavrentovich, OD 2013, 'Nematic Twist-Bend Phase with Nanoscale Modulation of Molecular Orientation', Nature Communications, vol. 4, 2635. https://doi.org/10.1038/ncomms3635
Borshch, V. ; Kim, Y K ; Xiang, J ; Gao, M. ; Jakli, A ; Panov, V P ; Vij, J K ; Imrie, C T ; Tampa, M G ; Mehl, G H ; Lavrentovich, O D . / Nematic Twist-Bend Phase with Nanoscale Modulation of Molecular Orientation. In: Nature Communications. 2013 ; Vol. 4.
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