3 years ago

Single liquid crystalline dendrimer under smectic-like mean field

Single liquid crystalline dendrimer under smectic-like mean field
Addis Mekonnen, Zerihun G. Workineh

Monte Carlo Simulation studies of different generation liquid crystalline dendrimers (LCDrs) () under smectic-like mean field have been presented. Mean field-induced configurational and alignment properties of several LCDrs at different field strengths and layer spacing values were investigated. Tractable coarse-grained force fields to model both monomer–monomer and monomer–field interaction potentials have been formulated. Particularly, the effect of mean field on the shape, size and orientation of LCDrs was addressed. Depending on the generation of an LCDr, strength of the field and the layer spacing, on average spherically symmetric LCDrs were changed to either rod- or disc-like shapes. At a relatively strong field, smaller-generation LCDrs stretched to their maximum size at bigger values of layer spacing, whereas larger-generation LCDrs compressed to attain short-cylinder-/disc-like shape at smaller values of layer spacing. In addition to stretching and compression, sub-molecular partitioning has also been observed. Two layers of mesogenic units separated by populations of spherical beads were formed along the field direction. Those layers of mesogens are oriented along the field direction with intensity of orientability highly depending on the field strength.

Publisher URL: http://www.tandfonline.com/doi/full/10.1080/02678292.2017.1357844

DOI: 10.1080/02678292.2017.1357844

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