Indication of a twist-grain-boundary-twist-bend phase of flexible core bent-shape chiral dimers
Abstract
The consequence of the molecular chirality of chiral additives on the nanostructure of the twist-bend nematic (NTB) liquid crystal phase with ambidextrous chirality and nanoscale pitch due to spontaneous symmetry breaking is studied. It is observed that the ambidextrous nanoscale pitch of the NTB phase increases by 50% due to 3% chiral additive, and the chiral transfer among the biphenyl groups disappears in the NTB* phase. Most significantly, a twist-grain boundary (TGB) type phase is found at c > 1.5 wt% chiral additive concentrations below the usual N* phase and above the non-CD active NTB* phase. In such a TGB type phase, the adjacent blocks of pseudo-layers of the nanoscale pitch rotate across the grain boundaries.
- Authors:
-
[1];
[6];
[1];
[1]
- Kent State Univ., Kent, OH (United States)
- Kent State Univ., Kent, OH (United States); College of Wooster, OH (United States)
- Kent State Univ., Kent, OH (United States); Univ. of Nebraska, Omaha, NE (United States)
- Advanced Precision Systems, Inc., Chagrin Falls, OH (United States)
- Kent State Univ., Kent, OH (United States); Univ. of Pennsylvania, Philadelphia, PA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1580828
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Soft Matter
- Additional Journal Information:
- Journal Volume: 15; Journal Issue: 16; Journal ID: ISSN 1744-683X
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 74 ATOMIC AND MOLECULAR PHYSICS
Citation Formats
Murachver, Matthew T., Nemati, Ahlam, Salamończyk, Mirosław, Bullock, Carson, Sabata, Zachary, Rahmani, Haumed, Vorobiova, Tetiana, Izadnegahdar, Alain, Salili, Seyyed Muhammad, Norman, Victoria, Zhu, Chenhui, Hegmann, Torsten, Sprunt, Samuel N., Gleeson, James T., and Jakli, Antal I. Indication of a twist-grain-boundary-twist-bend phase of flexible core bent-shape chiral dimers. United States: N. p., 2019.
Web. doi:10.1039/c8sm02338g.
Murachver, Matthew T., Nemati, Ahlam, Salamończyk, Mirosław, Bullock, Carson, Sabata, Zachary, Rahmani, Haumed, Vorobiova, Tetiana, Izadnegahdar, Alain, Salili, Seyyed Muhammad, Norman, Victoria, Zhu, Chenhui, Hegmann, Torsten, Sprunt, Samuel N., Gleeson, James T., & Jakli, Antal I. Indication of a twist-grain-boundary-twist-bend phase of flexible core bent-shape chiral dimers. United States. https://doi.org/10.1039/c8sm02338g
Murachver, Matthew T., Nemati, Ahlam, Salamończyk, Mirosław, Bullock, Carson, Sabata, Zachary, Rahmani, Haumed, Vorobiova, Tetiana, Izadnegahdar, Alain, Salili, Seyyed Muhammad, Norman, Victoria, Zhu, Chenhui, Hegmann, Torsten, Sprunt, Samuel N., Gleeson, James T., and Jakli, Antal I. Fri .
"Indication of a twist-grain-boundary-twist-bend phase of flexible core bent-shape chiral dimers". United States. https://doi.org/10.1039/c8sm02338g. https://www.osti.gov/servlets/purl/1580828.
@article{osti_1580828,
title = {Indication of a twist-grain-boundary-twist-bend phase of flexible core bent-shape chiral dimers},
author = {Murachver, Matthew T. and Nemati, Ahlam and Salamończyk, Mirosław and Bullock, Carson and Sabata, Zachary and Rahmani, Haumed and Vorobiova, Tetiana and Izadnegahdar, Alain and Salili, Seyyed Muhammad and Norman, Victoria and Zhu, Chenhui and Hegmann, Torsten and Sprunt, Samuel N. and Gleeson, James T. and Jakli, Antal I.},
abstractNote = {The consequence of the molecular chirality of chiral additives on the nanostructure of the twist-bend nematic (NTB) liquid crystal phase with ambidextrous chirality and nanoscale pitch due to spontaneous symmetry breaking is studied. It is observed that the ambidextrous nanoscale pitch of the NTB phase increases by 50% due to 3% chiral additive, and the chiral transfer among the biphenyl groups disappears in the NTB* phase. Most significantly, a twist-grain boundary (TGB) type phase is found at c > 1.5 wt% chiral additive concentrations below the usual N* phase and above the non-CD active NTB* phase. In such a TGB type phase, the adjacent blocks of pseudo-layers of the nanoscale pitch rotate across the grain boundaries.},
doi = {10.1039/c8sm02338g},
journal = {Soft Matter},
number = 16,
volume = 15,
place = {United States},
year = {2019},
month = {3}
}
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Works referencing / citing this record:
The Chiral Twist‐Bend Nematic Phase (N* TB )
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