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dc.contributor.authorGuidetti, Giulia
dc.contributor.authorSun, Hui
dc.contributor.authorIvanova, Alesja
dc.contributor.authorMarelli, Benedetto
dc.contributor.authorFrka‐Petesic, Bruno
dc.date.accessioned2021-10-18T18:20:27Z
dc.date.available2021-10-18T18:20:27Z
dc.date.issued2021-03
dc.date.submitted2021-03
dc.identifier.issn2366-7486
dc.identifier.urihttps://hdl.handle.net/1721.1/133034
dc.description.abstractControlled self-assembly of bio-sourced nanocolloids is of high importance for the development of sustainable and low-cost functional materials but controlling nanocomposite fabrication with both satisfactory optical properties and composition remains challenging. Silk fibroin (SF) and cellulose nanocrystals (CNCs) have independently demonstrated their ability to produce high-quality photonic materials, in part due to their low absorbance and their transparency in the visible range. While SF is able to replicate inverse structures by high-resolution nano-templating, CNCs can spontaneously assemble into cholesteric liquid crystalline structures that are retained upon solvent evaporation, yielding photonic films. In this work, the conditions of successful co-assembly of regenerated SF, extracted from silkworm silk, with CNCs extracted from cotton, are investigated. Their co-assembly is investigated for various relative concentration ratios and pH, combining polarized optical microscopy and spectroscopy, SEM, and other characterization techniques (XRD, ATR-FTIR, TGA). The appearance of photonic properties is observed when CNC and SF are assembled at pH ≥ 4.15, highlighting the importance of suppressing attractive electrostatic interactions between the two species for an organized structure to emerge. Beyond its fundamental motivations for colloidal co-assembly with structural proteins, this work is relevant to design sustainable optical materials compatible with food packaging coatings and edible coloring pigments.en_US
dc.language.isoen
dc.publisherWileyen_US
dc.relation.isversionof10.1002/ADSU.202000272en_US
dc.rightsCreative Commons Attribution 4.0 International licenseen_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.sourceWileyen_US
dc.titleCo‐Assembly of Cellulose Nanocrystals and Silk Fibroin into Photonic Cholesteric Filmsen_US
dc.typeArticleen_US
dc.identifier.citationGuidetti, G., Sun, H., Ivanova, A., Marelli, B., Frka-Petesic, B., Co-Assembly of Cellulose Nanocrystals and Silk Fibroin into Photonic Cholesteric Films. Adv. Sustainable Syst. 2021, 5, 2000272.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Civil and Environmental Engineering
dc.relation.journalAdvanced Sustainable Systemsen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dc.date.updated2021-10-18T18:03:16Z
dspace.orderedauthorsGuidetti, G; Sun, H; Ivanova, A; Marelli, B; Frka‐Petesic, Ben_US
dspace.date.submission2021-10-18T18:03:18Z
mit.journal.volume5en_US
mit.journal.issue6en_US
mit.licensePUBLISHER_CC
mit.metadata.statusAuthority Work Neededen_US


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