{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,5]],"date-time":"2026-05-05T02:34:19Z","timestamp":1777948459336,"version":"3.51.4"},"reference-count":30,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2025,10,24]],"date-time":"2025-10-24T00:00:00Z","timestamp":1761264000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"},{"start":{"date-parts":[[2025,10,24]],"date-time":"2025-10-24T00:00:00Z","timestamp":1761264000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["advanced.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Advanced Optical Materials"],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>One of the unresolved aspects of cellulose\u2010based liquid crystalline phases is their chirality. Although cellulose is intrinsically chiral, both left\u2010handed (LH) and right\u2010handed (RH) chiral nematic phases are reported in cellulose derivatives under different conditions. The origin of these discrepancies\u2014and whether LH and RH twisted structures coexist within a single material\u2014has remained unclear. Here, the first direct evidence of hierarchical LH and RH twisted structures coexisting in a solvent\u2010free, thermotropic cellulose derivative at room temperature is provided. Free\u2010standing cholesteric films exhibit distinct LH and RH twisted domains, whose pitches respond oppositely to uniaxial mechanical strain: the LH pitch increases, while the RH pitch decreases with increasing strain. This contrasting response results from the coexistence of intertwined LH and RH twisted structures, whose optical axes are oriented differently relative to the strain direction. Notably, after stretching beyond their elastic limit, the films spontaneously recover their original shape within minutes. During this recovery, circular dichroism (CD) measurements reveal an increase in RH pitch and a decrease in LH pitch, evidencing reversible, strain\u2010responsive behavior. Multiscale structural characterization confirms the hierarchical chiral organization and its mechanoresponsive nature, providing new insights into the origin of chirality in cellulose\u2010based liquid crystalline materials.<\/jats:p>","DOI":"10.1002\/adom.202502728","type":"journal-article","created":{"date-parts":[[2025,10,24]],"date-time":"2025-10-24T11:40:27Z","timestamp":1761306027000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Hierarchical Twist: Chirality Across Scales in Cellulose Cholesterics"],"prefix":"10.1002","volume":"14","author":[{"given":"N.","family":"Monge","sequence":"first","affiliation":[{"name":"i3N\/CENIMAT Department of Materials Science Faculty of Science and Technology Universidade NOVA de Lisboa  Campus de Caparica Caparica 2829\u2010516 Portugal"},{"name":"Faculty of Architecture University of Lisbon, Rua S\u00e1 Nogueira, P\u00f3lo Universit\u00e1rio  Alto da Ajuda Lisbon 1349\u2010055 Portugal"},{"name":"Lisbon School of Education Polytechnic University of Lisbon  Campus de Benfica do IPL Lisbon 1549\u2010003 Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5697-4363","authenticated-orcid":false,"given":"L.F.V.","family":"Pinto","sequence":"additional","affiliation":[{"name":"i3N\/CENIMAT Department of Materials Science Faculty of Science and Technology Universidade NOVA de Lisboa  Campus de Caparica Caparica 2829\u2010516 Portugal"}]},{"given":"E.","family":"Ferreira","sequence":"additional","affiliation":[{"name":"Department of Chemistry REQUIMTE\/UCIBIO and REQUIMTE\/CQFB Faculty of Science and Technology Universidade NOVA de Lisboa  Campus de Caparica Caparica 2829\u2010516 Portugal"}]},{"given":"P.L.","family":"Almeida","sequence":"additional","affiliation":[{"name":"i3N\/CENIMAT Department of Materials Science Faculty of Science and Technology Universidade NOVA de Lisboa  Campus de Caparica Caparica 2829\u2010516 Portugal"},{"name":"UniRE e Departamento de Engenharia Mec\u00e2nica ISEL \u2013 Instituto Superior de Engenharia de Lisboa Instituto Polit\u00e9cnico de Lisboa  Lisboa 1959\u2010007 Portugal"}]},{"given":"J.L.","family":"Figueirinhas","sequence":"additional","affiliation":[{"name":"CeFEMA &amp; LaPMET and Dept. de F\u00edsica IST  Av. Rovisco Pais Lisbon 1049\u2010001 Portugal"}]},{"given":"A.L.","family":"Carvalho","sequence":"additional","affiliation":[{"name":"Department of Chemistry REQUIMTE\/UCIBIO and REQUIMTE\/CQFB Faculty of Science and Technology Universidade NOVA de Lisboa  Campus de Caparica Caparica 2829\u2010516 Portugal"}]},{"given":"P.J.","family":"Sebasti\u00e3o","sequence":"additional","affiliation":[{"name":"CeFEMA &amp; LaPMET and Dept. de F\u00edsica IST  Av. 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