English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

Liquid crystalline (LC) mixtures of cholesteryl oleyl carbonate (COC) and4-pentyl-4'-cyanobiphenyl (5CB), as well as dispersions of single-walled carbonnanotubes (NTs) in these mixtures, were studied by means of selectivereflection measurements, differential scanning calorimetry (DSC) and opticalmicroscopy. The relative mass of COC in a mixture X was varied between 0.4 and1.0, the temperature range of measurements was between 284 K and 314 K, andconcentration of NTs was fixed at 0.1 %. Two important anomalies were noted:(1) the cholesteric to smectic-A transition temperature increased on dilutionof COC by non-smectogenic 5CB in the concentration range 0.8<X<1, and (2) thereciprocal pitch vs. 5CB concentration dependence was essentially linear, incontrast to behaviour commonly observed in nematic-cholesteric mixtures. Amodel of molecular arrangement in the mixtures, accounting for the possibilityof integration of 5CB dimers and monomers between COC molecules and presumablyexplaining the experimental data, was proposed. The helical pitch of thecholesteric mixtures remained practically unchanged upon doping by NTs, andonly slight widening of the selective reflection peaks was noted. The obtainedresults allow considering the COC+5CB mixtures as promising matrices forcomposite materials on the basis of liquid crystals and carbon nanotubes.

Anomalous selective reflection in cholesteryl oleyl carbonate - nematic 5CB mixtures and effects of their doping by single-walled carbon nanotubes