期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 2, 期 3, 页码 556-566出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3tc32137a
关键词
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资金
- Engineering and Physical Sciences Research Council (EPSRC) [EP/J007714/1]
- EPSRC [EP/J007714/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/J007714/1] Funding Source: researchfish
A detailed microscopy study of the mesophases of 1,11-di- (1-cyanobiphenyL-4-yOundecane (CB11CB) was undertaken, with an emphasis on attempting to relate the recent helicaltwist-bend model of the N-TB phase to the observed opticaltextures. Our ability to draw a freestanding film indicates that the phase is unlikely to be nematic and possesses Long range periodicity. No electrooptic response could be detected in the NTB phase, with or without addition of a chiral dopant aLthough dielectric breakdown and space charge were observed at high voltage Leading to field dependent pulsing of the sample. No optical rotation associated with a macroscopic helical structure could be discerned in the NTB phase. However, this observation could be taken to be in keeping with the extremely short pitch of a proposed twist-bend model.
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