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However, the issue of self-organization under non-equilibrium conditions, which is ubiquitous in living matter, has scarcely been addressed in cellulose-based materials. Here, we show that quasi-2D preparations of a lyotropic cellulose-based cholesteric mesophase display travelling colourful patterns, which are generated by a chemical reaction-diffusion mechanism being simultaneous with the evaporation of solvents at the boundaries. These patterns involve spatial and temporal variation in the amplitude and sign of the helix\u00b4s pitch. We propose a simple model, based on a reaction-diffusion mechanism, which simulates the observed spatiotemporal colour behaviour.<\/jats:p>","DOI":"10.1038\/s43246-021-00182-7","type":"journal-article","created":{"date-parts":[[2021,7,20]],"date-time":"2021-07-20T10:26:57Z","timestamp":1626776817000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Travelling colourful patterns in self-organized cellulose-based liquid crystalline structures"],"prefix":"10.1038","volume":"2","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8783-8740","authenticated-orcid":false,"given":"Pedro E. 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