Preparing templated optics using cellulose nanocrystal LC

Julian Evans; Nan Wang; Chenxi Li; Tingbiao Guo; Sailing He

doi:10.1117/12.2567152

20 August 2020 Preparing templated optics using cellulose nanocrystal LC

Julian Evans, Nan Wang, Chenxi Li, Tingbiao Guo, Sailing He

Proceedings Volume 11472, Liquid Crystals XXIV; 114720J (2020) https://doi.org/10.1117/12.2567152
Event: SPIE Organic Photonics + Electronics, 2020, Online Only

Abstract

Cellulose Nanocrystals are readily produced from many plant and bacterial sources and have been studied extensively for low cost self-assembled optical elements. Nanocrystals are known to form a chiral nematic phase, which allows for production of films with chiral character. I will discuss recent advances in understanding how to control the chirality of cellulose nanocrystal solutions. The Debye length of a nanocrystal solution is typically around 4nm for pH between 1.5 and 10 and abruptly drops to around 1 nm for pH lower or higher than this range. With a Debye Length of 1nm, the solution can only form nematic phase, which is more useful for production of waveplates and other birefringent optics. Additionally I will discuss the behavior of cellulose solutions with amorphous material remaining in solution which form discotic- like systems.

Conference Presentation

Citation Download Citation

Julian Evans, Nan Wang, Chenxi Li, Tingbiao Guo, and Sailing He "Preparing templated optics using cellulose nanocrystal LC", Proc. SPIE 11472, Liquid Crystals XXIV, 114720J (20 August 2020); https://doi.org/10.1117/12.2567152

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