Director configuration in the twist-bend nematic phase of CB11CB

Miglioli, Isabella; Bacchiocchi, Corrado; Arcioni, Alberto; Kohlmeier, Alexandra; Mehl, Georg H.; Zannoni, Claudio

Abstract

The director distribution in the nematic phases exhibited by the 100,1100-bis(4-cyanobiphenyl-40-yl)undecane (CB11CB) liquid crystal has been studied in the bulk with the EPR spin probe technique. EPR spectra confirmed the presence of an higher temperature uniaxial nematic phase and of a lower temperature nematic phase in which the director distribution is not uniform. Spectra recorded in the lower temperature nematic phase were not fully compatible with theoretical EPR spectra calculated according to the recently proposed model for the twist-bend phase in which the local domain director twists around an axis with a fixed tilt angle, θ₀, but were well described by a “distributed-tilt” model in which the director has a relatively narrow distribution, centred at θ₀.

Citation

Miglioli, I., Bacchiocchi, C., Arcioni, A., Kohlmeier, A., Mehl, G. H., & Zannoni, C. (2016). Director configuration in the twist-bend nematic phase of CB11CB. Journal of Materials Chemistry C, 4(41), 9887-9896. https://doi.org/10.1039/c6tc03246j

• Journal Article Type: Article
• Acceptance Date: Sep 27, 2016
• Online Publication Date: Sep 27, 2016
• Publication Date: Oct 7, 2016
• Deposit Date: Sep 28, 2016
• Publicly Available Date: Sep 28, 2016
• Journal: Journal of materials chemistry C
• Print ISSN: 2050-7526
• Electronic ISSN: 2050-7534
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 4
• Issue: 41
• Pages: 9887-9896
• DOI: https://doi.org/10.1039/c6tc03246j
• Keywords: Liquid crystals, CB11CB
• Public URL: https://hull-repository.worktribe.com/output/443556
• Publisher URL: http://pubs.rsc.org/en/content/articlelanding/2016/tc/c6tc03246j#!divAbstract
• Additional Information: : This document is Similarity Check deposited; : Corrado Bacchiocchi (ORCID); : Corrado Bacchiocchi (ResearcherID); : Claudio Zannoni (ResearcherID); : The Royal Society of Chemistry has an exclusive publication licence for this journal; : Single-blind; : Received 29 July 2016; Accepted 27 September 2016; Accepted Manuscript published 27 September 2016; Advance Article published 11 October 2016; Version of Record published 20 October 2016