Playing the blues, the greens and the reds with cellulose-based structural colours
| Autor(a) principal: | |
|---|---|
| Data de Publicação: | 2020 |
| Outros Autores: | , , , |
| Tipo de documento: | Artigo |
| Idioma: | eng |
| Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
| Texto Completo: | http://hdl.handle.net/10362/110265 |
Resumo: | POCI- 01-0145-FEDER-007688 (Reference UIDB/50025/2020-2023) PTDC/CTM-BIO/6178/2014 M-ERA-NET2/0007/2016 PTDC/CTM-REF/30529/2017 EUTOPIA CA17139 Slovenian Research Agency Grant Z1-5441 P1-0099 |
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oai:run.unl.pt:10362/110265 |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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7160 |
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Playing the blues, the greens and the reds with cellulose-based structural coloursPhysical and Theoretical ChemistryPOCI- 01-0145-FEDER-007688 (Reference UIDB/50025/2020-2023) PTDC/CTM-BIO/6178/2014 M-ERA-NET2/0007/2016 PTDC/CTM-REF/30529/2017 EUTOPIA CA17139 Slovenian Research Agency Grant Z1-5441 P1-0099Structural vivid colours can arise from the interference of light reflected from structures exhibiting periodicity on scales in the range of visible wavelengths. This effect is observed with light reflected from cell-walls of some plants and exoskeletons of certain insects. Sometimes the colour sequence observed for these structures consists of nearly circular concentric rings that vary in colour from Red, Orange, Yellow, Green, Cyan to Blue, from the periphery to the centre, similarly to the colour scheme sequence observed for the rainbow (ROYGB). The sequence of colours has been found for solid films obtained from droplets of aqueous cellulose nanocrystals (CNCs) suspensions and attributed to a "coffee ring"effect. In this work, coloured lyotropic solutions and solid films obtained from a cellulose derivative in the presence of trifluoroacetic acid (TFA), which acts as a "reactive solvent", are revisited. The systems were investigated with spectroscopy, using circularly and linearly polarised light, coupled with a polarised optical microscope (POM) and scanning electron microscopy (SEM). The lyotropic cholesteric liquid crystalline solutions were confined in capillaries to simplify 1D molecular diffusion along the capillary where an unexpected sequence of the structural colours was observed. The development and reappearance of the sequence of vivid colours seem consistent with the reaction-diffusion of the "reactive solvent"in the presence of the cellulosic chains. The strong TFA acts as an auto-catalyst for the chemical reaction between TFA and the hydroxyl groups, existing along the cellulosic chain, and diffuses to the top and bottom along the capillaries, carrying dissolved cellulosic chains. Uncovering the precise mechanism of colour sequence and evolution over time in cellulosic lyotropic solutions has important implications for future optical/sensors applications and for the understanding of the development of cellulose-based structures in nature. This journal isCENIMAT-i3N - Centro de Investigação de Materiais (Lab. Associado I3N)DCM - Departamento de Ciência dos MateriaisRUNChagas, RicardoSilva, Pedro E. S.Fernandes, Susete N.Žumer, SlobodanGodinho, Maria Helena2022-03-31T00:31:41Z2020-10-012020-10-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article14application/pdfhttp://hdl.handle.net/10362/110265eng1359-6640PURE: 26616545https://doi.org/10.1039/d0fd00020einfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-03-11T04:54:12Zoai:run.unl.pt:10362/110265Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:41:35.781915Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
| dc.title.none.fl_str_mv |
Playing the blues, the greens and the reds with cellulose-based structural colours |
| title |
Playing the blues, the greens and the reds with cellulose-based structural colours |
| spellingShingle |
Playing the blues, the greens and the reds with cellulose-based structural colours Chagas, Ricardo Physical and Theoretical Chemistry |
| title_short |
Playing the blues, the greens and the reds with cellulose-based structural colours |
| title_full |
Playing the blues, the greens and the reds with cellulose-based structural colours |
| title_fullStr |
Playing the blues, the greens and the reds with cellulose-based structural colours |
| title_full_unstemmed |
Playing the blues, the greens and the reds with cellulose-based structural colours |
| title_sort |
Playing the blues, the greens and the reds with cellulose-based structural colours |
| author |
Chagas, Ricardo |
| author_facet |
Chagas, Ricardo Silva, Pedro E. S. Fernandes, Susete N. Žumer, Slobodan Godinho, Maria Helena |
| author_role |
author |
| author2 |
Silva, Pedro E. S. Fernandes, Susete N. Žumer, Slobodan Godinho, Maria Helena |
| author2_role |
author author author author |
| dc.contributor.none.fl_str_mv |
CENIMAT-i3N - Centro de Investigação de Materiais (Lab. Associado I3N) DCM - Departamento de Ciência dos Materiais RUN |
| dc.contributor.author.fl_str_mv |
Chagas, Ricardo Silva, Pedro E. S. Fernandes, Susete N. Žumer, Slobodan Godinho, Maria Helena |
| dc.subject.por.fl_str_mv |
Physical and Theoretical Chemistry |
| topic |
Physical and Theoretical Chemistry |
| description |
POCI- 01-0145-FEDER-007688 (Reference UIDB/50025/2020-2023) PTDC/CTM-BIO/6178/2014 M-ERA-NET2/0007/2016 PTDC/CTM-REF/30529/2017 EUTOPIA CA17139 Slovenian Research Agency Grant Z1-5441 P1-0099 |
| publishDate |
2020 |
| dc.date.none.fl_str_mv |
2020-10-01 2020-10-01T00:00:00Z 2022-03-31T00:31:41Z |
| dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
| dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10362/110265 |
| url |
http://hdl.handle.net/10362/110265 |
| dc.language.iso.fl_str_mv |
eng |
| language |
eng |
| dc.relation.none.fl_str_mv |
1359-6640 PURE: 26616545 https://doi.org/10.1039/d0fd00020e |
| dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
14 application/pdf |
| dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
| institution |
RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799138028969525248 |