Anchoring and molecular conformation of liquid crystalline dendrimer

Nontrivial topological defects of micro-rods immersed in nematics and their phototuning

“…Under our experimental conditions, W of the homeotropic surface covered by AzD6 was previously estimated to be of the order of 10 −3 W m −2 . 27 Assuming the real values of K and R are 5 pN and 5 μm, respectively, we obtain w ∼ 1000. This explains why we see the hedgehog-type defect in the experiment.…”

“…Upon the UV irradiation, AzD6 undergoes trans -to- cis isomerization, leading to a change in the easy axis of the anchoring from the homeotropic to tilt state. 27–29 Here we study a pair of micro-rods that are aligned with a small inclination angle (Fig. 7).…”

“…In 3D, the majority of the surface localized AzD6 molecules stay in a bowl-like conformation. 27 This in turn triggers the homeotropic alignment. The phase sequence of AzD6 molecules is smectic B [SmB]-(48.6 °C) smectic A [SmA]-(97.6 °C)-isotropic liquids [Iso].…”

“…1A. 27–29 The molecule is a second-generation azodendrimer, bearing azobenzene mesogenic wings. The core of AzD6 is, to some extent, hydrophilic, and the mesogenic wings are hydrophobic.…”

Developments in Treatment Methodologies Using Dendrimers for Infectious Diseases

“…The mesogenic liquid crystalline type of monomers facilitate formation of an interfacial layer. This liquid crystalline alignment can be spatially controlled by irradiation with light of different wavelengths [ 28 ].…”