Photonic Bandgap in Achiral Liquid Crystals—A Twist on a Twist

Damian Pociecha; Nataša Vaupotič; Magdalena Majewska; Ewan Cruickshank; Rebecca Walker; John M.D. Storey; Corrie T. Imrie; Cheng Wang; Ewa Gorecka

doi:10.1002/adma.202103288

Photonic Bandgap in Achiral Liquid Crystals—A Twist on a Twist

Damian Pociecha^*, Nataša Vaupotič, Magdalena Majewska, Ewan Cruickshank, Rebecca Walker, John M.D. Storey, Corrie T. Imrie, Cheng Wang, Ewa Gorecka

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

Achiral mesogenic molecules are shown to be able to spontaneously assemble into liquid crystalline smectic phases having either simple or double-helical structures. At the transition between these phases, the double-helical structure unwinds. As a consequence, in some temperature range, the pitch of the helix becomes comparable to the wavelength of visible light and the selective reflection of light in the visible range is observed. The photonic bandgap phenomenon is reported for achiral liquid crystals.

Original language	English
Article number	2103288
Journal	Advanced Materials
Early online date	16 Aug 2021
DOIs	https://doi.org/10.1002/adma.202103288
Publication status	Published - 1 Oct 2021

Bibliographical note

Funding Information:
The work was financed by the National Science Centre (Poland) under the grant no. 2016/22/A/ST5/00319 (EG). N.V. acknowledges the support of the Slovenian Research Agency (ARRS), through the research core funding no. P1‐0055. The beamline 11.0.1.2 at the Advanced Light Source at the Lawrence Berkeley National Laboratory is supported by the Director of the Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE‐AC02‐05CH11231.

Keywords

chirality
helical structures
liquid crystals
photonic bandgap
twist–bend phases

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10.1002/adma.202103288Licence: CC BY-NC

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title = "Photonic Bandgap in Achiral Liquid Crystals—A Twist on a Twist",

abstract = "Achiral mesogenic molecules are shown to be able to spontaneously assemble into liquid crystalline smectic phases having either simple or double-helical structures. At the transition between these phases, the double-helical structure unwinds. As a consequence, in some temperature range, the pitch of the helix becomes comparable to the wavelength of visible light and the selective reflection of light in the visible range is observed. The photonic bandgap phenomenon is reported for achiral liquid crystals.",

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AU - Pociecha, Damian

AU - Vaupotič, Nataša

AU - Majewska, Magdalena

AU - Cruickshank, Ewan

AU - Walker, Rebecca

AU - Storey, John M.D.

AU - Imrie, Corrie T.

AU - Wang, Cheng

AU - Gorecka, Ewa

N1 - Funding Information: The work was financed by the National Science Centre (Poland) under the grant no. 2016/22/A/ST5/00319 (EG). N.V. acknowledges the support of the Slovenian Research Agency (ARRS), through the research core funding no. P1‐0055. The beamline 11.0.1.2 at the Advanced Light Source at the Lawrence Berkeley National Laboratory is supported by the Director of the Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE‐AC02‐05CH11231.

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N2 - Achiral mesogenic molecules are shown to be able to spontaneously assemble into liquid crystalline smectic phases having either simple or double-helical structures. At the transition between these phases, the double-helical structure unwinds. As a consequence, in some temperature range, the pitch of the helix becomes comparable to the wavelength of visible light and the selective reflection of light in the visible range is observed. The photonic bandgap phenomenon is reported for achiral liquid crystals.

AB - Achiral mesogenic molecules are shown to be able to spontaneously assemble into liquid crystalline smectic phases having either simple or double-helical structures. At the transition between these phases, the double-helical structure unwinds. As a consequence, in some temperature range, the pitch of the helix becomes comparable to the wavelength of visible light and the selective reflection of light in the visible range is observed. The photonic bandgap phenomenon is reported for achiral liquid crystals.

KW - chirality

KW - helical structures

KW - liquid crystals

KW - photonic bandgap

KW - twist–bend phases

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JO - Advanced Materials

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M1 - 2103288

ER -

Photonic Bandgap in Achiral Liquid Crystals—A Twist on a Twist

Abstract

Bibliographical note

Keywords

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