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Structurally Colore...
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Shanker, RaviLinköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten,Wallenberg Wood Science Center
(författare)
Structurally Colored Cellulose Nanocrystal Films as Transreflective Radiative Coolers
- Artikel/kapitelEngelska2022
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2022-06-06
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American Chemical Society (ACS),2022
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:kth-325271
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-325271URI
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https://doi.org/10.1021/acsnano.1c10959DOI
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https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-187541URI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
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QC 20230404
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Funding Agencies|Knut and Alice Wallenberg foundation; Linkoping University; Wallenberg Wood Science Center; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [2009 00971]; Swedish Foundation for Strategic Research; Wenner-Gren Foundations; Olle Engkvist Foundation [194-0679]; Swedish Research Council
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Radiative cooling forms an emerging direction in which objects are passively cooled via thermal radiation to cold space. Cooling materials should provide high thermal emissivity (infrared absorptance) and low solar absorptance, making cellulose an ideal and sustainable candidate. Broadband solar-reflective or transparent coolers are not the only systems of interest, but also more pleasingly looking colored systems. However, solutions based on wavelength-selective absorption generate not only color but also heat and thereby counteract the cooling function. Intended as coatings for solar cells, we demonstrate a transreflective cellulose material with minimal solar absorption that generates color by wavelength-selective reflection, while it transmits other parts of the solar spectrum. Our solution takes advantage of the ability of cellulose nanocrystals to self-assemble into helical periodic structures, providing nonabsorptive films with structurally colored reflection. Application of violet-blue, green, and red cellulose films on silicon substrates reduced the temperature by up to 9 °C under solar illumination, as result of a combination of radiative cooling and reduced solar absorption due to the wavelength-selective reflection by the colored coating. The present work establishes self-assembled cellulose nanocrystal photonic films as a scalable photonic platform for colored radiative cooling.
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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Anusuyadevi, Prasaanth RaviKTH,Fiber- och polymerteknologi,Royal Inst Technol KTH, Sweden; MS Ramaiah Inst Technol, India(Swepub:kth)u102o9ff
(författare)
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Gamage, SampathLinköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten,Wallenberg Wood Science Center(Swepub:liu)samga31
(författare)
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Hallberg, T.FOI Swedish Def Res Agcy, Dept Electroopt Syst, S-58330 Linkoping, Sweden
(författare)
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Kariis, H.FOI Swedish Def Res Agcy, Dept Electroopt Syst, S-58330 Linkoping, Sweden
(författare)
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Banerjee, DebashreeLinköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten(Swepub:liu)debba39
(författare)
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Svagan, Anna JustinaKTH,Fiber- och polymerteknologi,Royal Inst Technol KTH, Sweden(Swepub:kth)u1hz2inh
(författare)
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Jonsson, Magnus,1981-Linköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten,Wallenberg Wood Science Center(Swepub:liu)magjo02
(författare)
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Linköpings universitetLaboratoriet för organisk elektronik
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:ACS Nano: American Chemical Society (ACS)16:7, s. 10156-101621936-08511936-086X
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