RECONFIGURATION OF STRUCTURAL CHIRALITY IN POLYMER STABILIZED LIQUID CRYSTAL PHASES
Abstract
The cholesteric liquid crystalline (CLC) phase self organizes into a helical structure which in the planar orientation exhibits a selective interference reflection. The CLC phase can exhibit dynamic optical responses with thermal, photonic, and electric stimuli. Electric field control of the selective reflection of the CLC phase has long been considered as an approach to realize electrochromism. Our prior research has developed a novel method to reconfigure the selective reflection of the CLC phase by developing structural chirality within a stabilizing polymer network. Upon application of an electric field, the structural chirality of the polymer network is deformed (due to ions trapped on or within the polymer). Informed and motivated in part by the potential utility of the dynamic electro-optic performance realized in hierarchically organized and chiral liquid crystal phases, this proposal targets basic research relating to elucidating the fundamental nature of chirality transfer from these templated polymer networks onto liquid crystalline materials. Through targeted composition structure-property studies, we will target three research objectives: Develop a physical understanding of the nature of structural chirality. Elucidate ion-material interactions in polymer/liquid crystalline composites prepared with structural chirality. Tailor mechanical properties of polymer stabilizing network to realize differentiated electro-optic performance. The novel electro-optic response of these polymer/liquid crystal composites make them distinguished candidates to realize dynamic optical elements relevant for USAF applications in light management. The primary outcome of this research activity is to finally elucidate the fundamental organic materials chemistry of the reconfiguration of structural chirality derived from polymer networks in liquid crystalline systems.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 12, 2021
- Source ID
- FA95502010311
Entities
People
- Timothy White
Organizations
- Air Force Office of Scientific Research
- Regents of the University of Colorado
- United States Air Force