Clusters of B7 Fibers Reveal Origin of Blue Phase Stability in a Binary Mixture of Chiral Rod-like and Achiral Bent-Core Molecules

Prutha, N; Pratibha, R.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/7294

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DC Field	Value	Language
dc.contributor.author	Prutha, N	-
dc.contributor.author	Pratibha, R.	-
dc.date.accessioned	2019-09-16T15:16:55Z	-
dc.date.available	2019-09-16T15:16:55Z	-
dc.date.issued	2019-08	-
dc.identifier.citation	Langmuir 2019, Vol.35, p11200−11209	en_US
dc.identifier.issn	0743-7463	-
dc.identifier.issn	1520-5827 (Online)	-
dc.identifier.uri	http://hdl.handle.net/2289/7294	-
dc.description	Restricted Access	en_US
dc.description.abstract	Liquid crystal (LC) blue phases (BPs) have gained relevance because of their potential applicability as tunable photonic band gap materials. However, their narrow temperature range often restricts technical usage. Doping with an LC made of achiral bent-core (BC) molecules is one of the strategies employed to increase BP stability. It is now shown that mixing a BCLC exhibiting the polarization-modulated lamellar B7 phase, with a calamitic chiral LC made of rod-like (R) molecules, enhances the BP range considerably. The special feature in this system is the spontaneous expulsion of clusters of B7 fibers in the chiral nematic (N*) phase occurring below the BPs. This gives a clear indication that islands rich in BC molecules lie interspersed between the R molecules. Based on several experimental studies, it is shown that the BP stability may be attributed to an interplay of conformational and intrinsic chirality of the BC and R molecules across the interface of these islands. This study provides new insights from a molecular point of view and provides a novel technique for designing stable-induced BPs. The additional novelty is the occurrence of a phase transition within the fibers. Further, the electro-responsive fibers may also have a potential to form new materials.	en_US
dc.language.iso	en	en_US
dc.publisher	American Chemical Society Publications	en_US
dc.relation.uri	https://doi.org/10.1021/acs.langmuir.9b01545	en_US
dc.rights	2019 American Chemical Society	en_US
dc.title	Clusters of B7 Fibers Reveal Origin of Blue Phase Stability in a Binary Mixture of Chiral Rod-like and Achiral Bent-Core Molecules	en_US
dc.type	Article	en_US
dc.additional	Supporting information available	en_US
Appears in Collections:	Research Papers (SCM)

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