| 초록 |
Recently, the topographic patterning of surfaces by lithography has emerged as a powerful tool for producing single structural domains of soft materials. Here the use of surface topography is extended to the organization of liquid crystals of bent-core molecules that exhibit a rich and exciting, but that, on the other hand, have proved very difficult to align. Among the most notorious in this regard are the polarization splay modulated (B7) phases, in which the symmetry-required preference for ferroelectric polarization to be locally bouquet-like or “splayed” is expressed. Filling space with splay of a single sign requires defects and in the B7 splay is accommodated in the form of periodic splay stripes spaced by defects and coupled to layer undulations. Growth under conditions of confinement is found to produce completely new growth morphology, generating highly ordered periodic layering patterns. |
