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Self-Assembly Route to TiO2 and TiC with a Liquid Crystalline Order

TitleSelf-Assembly Route to TiO2 and TiC with a Liquid Crystalline Order
Publication TypeJournal Article
Year of Publication2019
AuthorsNguyen, T-D, Lizundia, E, Niederberger, M, Hamad, WY, MacLachlan, MJ
JournalCHEMISTRY OF MATERIALS
Volume31
Pagination2174-2181
Date PublishedMAR 26
Type of ArticleArticle
ISSN0897-4756
Abstract

We report the liquid crystalline self-assembly of cellulose nanocrystals (CNCs) with peroxotitanate to replicate large freestanding mesoporous films of TiO2 and chiral nematic TiC structures. The compatibility of cellulose liquid crystals with water-soluble peroxotitanate enabled them to self-assemble into flexible chiral nematic TiO2/cellulose composite films. The highly compatible peroxotitanate/CNC mixture is a new liquid crystalline system to investigate the development of photonic films with tunable optical properties and structural replication by varying the ratio of constituents. Iridescent peroxotitanate/CNC composites were heated under hydrothermal conditions and calcined to generate layered mesoporous anatase TiO2 replicas that are robust, semitransparent films. Through magnesiothermic reduction, we transformed carbonized peroxotitanate/ CNC assemblies to mesoporous TiC with a chiral nematic order. Our work shows the potential of the mesoporous TiC to function as a long-life cycle rechargeable lithium-ion battery anode material and may extend this route to other peroxometallate compounds.

DOI10.1021/acs.chemmater.9b00462