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dc.contributor.authorZhu, Wenkai
dc.contributor.authorDroguet, Benjamin
dc.contributor.authorShen, Qingchen
dc.contributor.authorZhang, Yun
dc.contributor.authorParton, Thomas
dc.contributor.authorShan, Xiwei
dc.contributor.authorParker, Richard
dc.contributor.authorDe Volder, Michael FL
dc.contributor.authorDeng, Tao
dc.contributor.authorVignolini, Silvia
dc.contributor.authorLi, Tian
dc.date.accessioned2022-06-22T23:30:52Z
dc.date.available2022-06-22T23:30:52Z
dc.identifier.issn2198-3844
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/338311
dc.description.abstractDaytime radiative cooling (DRC) materials offer a sustainable approach to thermal management by exploiting a net positive heat transfer to deep space. While such materials typically have a white or mirror-like appearance to maximize solar reflection, extending the palette of available colors is required to promote their real-world utilization. However, the incorporation of conventional absorption-based colorants inevitably leads to solar heating, which counteracts any radiative cooling effect. In this work, we instead demonstrate efficient sub-ambient DRC (Day: -4 °C, Night: -11 °C) from a vibrant, structurally colored film prepared from naturally-derived cellulose nanocrystals (CNCs). Arising from the underlying photonic nanostructure, the film selectively reflects visible light resulting in intense, fade-resistant coloration, whilst maintaining a low solar absorption (~3%). Additionally, a high emission within the mid-infrared atmospheric transparent window (>90%) allows for significant radiative heat loss. By coating such a CNC film onto a highly-scattering, porous ethylcellulose (EC) base-layer, any sunlight that penetrates the CNC layer is backscattered by the EC layer below, achieving broadband solar reflection and vibrant structural color at the same time. Finally, we demonstrate scalable manufacturing using a commercially-relevant roll-to-roll process, which validates the potential to produce such colored radiative cooling materials at a large scale from a low-cost and sustainable feedstock.
dc.description.sponsorshipStartup Funds from School of Mechanical Engineering at Purdue University, ASME Haythornthwaite Foundation Research Initiation Grant, the European Research Council (ERC-2014-STG H2020 639088), the Engineering and Physical Sciences Research Council (EPSRC: EP/R511675/1; EP/N016920/1; EP/L015978/1), the Biotechnology and Biological Sciences Research Council (BBSRC: BB/V00364X/1), the European Union Horizon 2020 Marie Skłodowska-Curie research and innovation programme (H2020-MSCA-ITN-2016 722842), the Shanghai Jiao Tong Grant.
dc.publisherWiley
dc.rightsAll Rights Reserved
dc.rights.urihttp://www.rioxx.net/licenses/all-rights-reserved
dc.titleStructurally Colored Radiative Cooling Cellulosic Films
dc.typeArticle
dc.publisher.departmentDepartment of Chemistry
dc.date.updated2022-06-22T09:30:39Z
prism.publicationNameAdvanced Science
dc.identifier.doi10.17863/CAM.85720
dcterms.dateAccepted2022-06-21
rioxxterms.versionofrecord10.1002/advs.202202061
rioxxterms.versionAM
dc.contributor.orcidZhu, Wenkai [0000-0002-1844-0579]
dc.contributor.orcidDroguet, Benjamin [0000-0002-9293-5182]
dc.contributor.orcidShen, Qingchen [0000-0001-6394-7769]
dc.contributor.orcidZhang, Yun [0000-0003-1665-0561]
dc.contributor.orcidParton, Thomas [0000-0001-7153-1042]
dc.contributor.orcidParker, Richard [0000-0002-4096-9161]
dc.contributor.orcidDe Volder, Michael FL [0000-0003-1955-2270]
dc.contributor.orcidVignolini, Silvia [0000-0003-0664-1418]
dc.contributor.orcidLi, Tian [0000-0002-1087-0662]
dc.identifier.eissn2198-3844
rioxxterms.typeJournal Article/Review
pubs.funder-project-idBBSRC (BB/V00364X/1)
pubs.funder-project-idEuropean Research Council (639088)
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (722842)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/N016920/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/R511675/1)
pubs.funder-project-idEPSRC (1948659)
pubs.funder-project-idEngineering and Physical Sciences Research Council (1948659)
cam.issuedOnline2022-07-17
datacite.issupplementedby.urlhttps://doi.org/10.17863/CAM.85818
cam.orpheus.successWed Aug 03 09:45:53 BST 2022 - Embargo updated*
cam.orpheus.counter3
cam.depositDate2022-06-22
pubs.licence-identifierapollo-deposit-licence-2-1
pubs.licence-display-nameApollo Repository Deposit Licence Agreement
rioxxterms.freetoread.startdate2022-07-17


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