Probing and controlling liquid crystal helical nanofilaments.
basic_science · Level V
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- Record sourced from PubMed, PMID 25867200.
- Also identified by DOI 10.1021/acs.nanolett.5b00760.
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Abstract
We report the first in situ measurement of the helical pitch of the helical nanofilament B4 phase of bent-core liquid crystals using linearly polarized, resonant soft X-ray scattering at the carbon K-edge. A strong, anisotropic scattering peak corresponding to the half-pitch of the twisted smectic layer structure was observed. The equilibrium helical half-pitch of NOBOW is found to be 120 nm, essentially independent of temperature. However, the helical pitch can be tuned by mixing guest organic molecules with the bent-core host, followed by thermal annealing.