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Self-assembling, macroscopically oriented, polymer filaments; a doubly nematic organogel

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Self-assembling, macroscopically oriented, polymer filaments; a doubly nematic organogel. / Gleeson, Helen F.; Kaur, Sarabjot; Srigengan, Shajeth; Gortz, Verena; Mandle, Richard; Lydon, John; Liu, Harry.

In: Soft Matter, 29.10.2018.

Research output: Contribution to journalArticle

Harvard

Gleeson, HF, Kaur, S, Srigengan, S, Gortz, V, Mandle, R, Lydon, J & Liu, H 2018, 'Self-assembling, macroscopically oriented, polymer filaments; a doubly nematic organogel', Soft Matter. https://doi.org/10.1039/C8SM01638K

APA

Gleeson, H. F., Kaur, S., Srigengan, S., Gortz, V., Mandle, R., Lydon, J., & Liu, H. (2018). Self-assembling, macroscopically oriented, polymer filaments; a doubly nematic organogel. Soft Matter. https://doi.org/10.1039/C8SM01638K

Vancouver

Gleeson HF, Kaur S, Srigengan S, Gortz V, Mandle R, Lydon J et al. Self-assembling, macroscopically oriented, polymer filaments; a doubly nematic organogel. Soft Matter. 2018 Oct 29. https://doi.org/10.1039/C8SM01638K

Author

Gleeson, Helen F. ; Kaur, Sarabjot ; Srigengan, Shajeth ; Gortz, Verena ; Mandle, Richard ; Lydon, John ; Liu, Harry. / Self-assembling, macroscopically oriented, polymer filaments; a doubly nematic organogel. In: Soft Matter. 2018.

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@article{520560f507434facba0218dc2a098b9a,
title = "Self-assembling, macroscopically oriented, polymer filaments; a doubly nematic organogel",
abstract = "Nanoscale phase separation and self-organisation in liquid crystals leads to the formation of remarkable hierarchicalstructures. There are several examples of heliconical nanofilament structures including in the nematic twist-bend (NTB)phase, the B4 phase and liquid crystal gels formed from the B4 phase. Both the formation of the polymer-like structuresthat permeate the soft-solids and their hierarchical structures are fascinating, not least because of the analogies that canbe drawn with naturally-occurring structures. Here, we report a remarkably simple binary system formed from a nonsymmetricBC molecule and the rod-like liquid crystal, 5CB. The pure bent-core system exhibits both nematic and darkconglomerate liquid crystal phases. At very low concentrations of the BC material (5-10{\%}) this binary systemspontaneously self-assembles into a soft solid formed from nanoscale filaments that are aligned by their nematicenvironment. Macroscopically, the soft solid shows behaviour that can be associated with both polymers and gels.Interestingly, the sub-micron scale structure of the filaments appears remarkably similar to some organised fibrousstructures in nature (e.g. chitin, cellulose, insect cuticle, plant cell walls) something we attribute to self-assembly and selforganisationin an aligned liquid crystalline environment. The nanoscale structure of the filaments show no features thatcan be associated with heliconical ordering down to length scales of tens of nanometers. However, the x-ray data suggeststhat a metastable rectangular columnar phase which is highly ordered in one dimension initially forms, changing to ahexagonal lattice on a timescale of tens of minutes.",
author = "Gleeson, {Helen F.} and Sarabjot Kaur and Shajeth Srigengan and Verena Gortz and Richard Mandle and John Lydon and Harry Liu",
note = "{\circledC} The Royal Society of Chemistry 2018. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.",
year = "2018",
month = "10",
day = "29",
doi = "10.1039/C8SM01638K",
language = "English",
journal = "Soft Matter",
issn = "1744-683X",
publisher = "Royal Society of Chemistry",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Self-assembling, macroscopically oriented, polymer filaments; a doubly nematic organogel

AU - Gleeson, Helen F.

AU - Kaur, Sarabjot

AU - Srigengan, Shajeth

AU - Gortz, Verena

AU - Mandle, Richard

AU - Lydon, John

AU - Liu, Harry

N1 - © The Royal Society of Chemistry 2018. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.

PY - 2018/10/29

Y1 - 2018/10/29

N2 - Nanoscale phase separation and self-organisation in liquid crystals leads to the formation of remarkable hierarchicalstructures. There are several examples of heliconical nanofilament structures including in the nematic twist-bend (NTB)phase, the B4 phase and liquid crystal gels formed from the B4 phase. Both the formation of the polymer-like structuresthat permeate the soft-solids and their hierarchical structures are fascinating, not least because of the analogies that canbe drawn with naturally-occurring structures. Here, we report a remarkably simple binary system formed from a nonsymmetricBC molecule and the rod-like liquid crystal, 5CB. The pure bent-core system exhibits both nematic and darkconglomerate liquid crystal phases. At very low concentrations of the BC material (5-10%) this binary systemspontaneously self-assembles into a soft solid formed from nanoscale filaments that are aligned by their nematicenvironment. Macroscopically, the soft solid shows behaviour that can be associated with both polymers and gels.Interestingly, the sub-micron scale structure of the filaments appears remarkably similar to some organised fibrousstructures in nature (e.g. chitin, cellulose, insect cuticle, plant cell walls) something we attribute to self-assembly and selforganisationin an aligned liquid crystalline environment. The nanoscale structure of the filaments show no features thatcan be associated with heliconical ordering down to length scales of tens of nanometers. However, the x-ray data suggeststhat a metastable rectangular columnar phase which is highly ordered in one dimension initially forms, changing to ahexagonal lattice on a timescale of tens of minutes.

AB - Nanoscale phase separation and self-organisation in liquid crystals leads to the formation of remarkable hierarchicalstructures. There are several examples of heliconical nanofilament structures including in the nematic twist-bend (NTB)phase, the B4 phase and liquid crystal gels formed from the B4 phase. Both the formation of the polymer-like structuresthat permeate the soft-solids and their hierarchical structures are fascinating, not least because of the analogies that canbe drawn with naturally-occurring structures. Here, we report a remarkably simple binary system formed from a nonsymmetricBC molecule and the rod-like liquid crystal, 5CB. The pure bent-core system exhibits both nematic and darkconglomerate liquid crystal phases. At very low concentrations of the BC material (5-10%) this binary systemspontaneously self-assembles into a soft solid formed from nanoscale filaments that are aligned by their nematicenvironment. Macroscopically, the soft solid shows behaviour that can be associated with both polymers and gels.Interestingly, the sub-micron scale structure of the filaments appears remarkably similar to some organised fibrousstructures in nature (e.g. chitin, cellulose, insect cuticle, plant cell walls) something we attribute to self-assembly and selforganisationin an aligned liquid crystalline environment. The nanoscale structure of the filaments show no features thatcan be associated with heliconical ordering down to length scales of tens of nanometers. However, the x-ray data suggeststhat a metastable rectangular columnar phase which is highly ordered in one dimension initially forms, changing to ahexagonal lattice on a timescale of tens of minutes.

U2 - 10.1039/C8SM01638K

DO - 10.1039/C8SM01638K

M3 - Article

JO - Soft Matter

T2 - Soft Matter

JF - Soft Matter

SN - 1744-683X

ER -