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MANFREDI SAELI

Nano-composite thermochromic thin films and their application in Energy-efficient glazing

  • Autori: Saeli, M; Piccirillo, C; Parkin, IP; Ridley, I; Binions, R
  • Anno di pubblicazione: 2009
  • Tipologia: Articolo in rivista (Articolo in rivista)
  • Parole Chiave: CVD, Hybrid Aerosol, Vanadium dioxide, Thermochromism
  • OA Link: http://hdl.handle.net/10447/44006

Abstract

A hybridatmosphericpressureandaerosol-assistedchemicalvapourdepositionstrategyispresentedas a facileroutefortheproductionofvanadiumdioxidenano-compositethinfilms.Theeffectofthe inclusionofgoldnanoparticlesandtheuseofasurfactantmolecule,tetraoctylammoniumbromide,is discussed.Thefilmswerefullycharacterisedusingawidevarietyoftechniques,includingscanning electronmicroscopy,X-raydiffraction,X-rayphotoelectronspectroscopyandUV/vis/NIRspectroscopy. It isshownthatmicro-structuralchangesbroughtaboutbycarefulcontroloffilmgrowthconditions, and/ortheuseofsurfactant,leadtoanenhancementofthermochromicproperties.Goldnanoparticle incorporationleadstoasignificantchangeinthecolourofthefilmsfromayellow-browncolourtoa varietyofgreensandbluesdependingonthegoldnanoparticleconcentration.Thefilmsbecomemore reflectiveintheinfra-redwithincreasedgoldnanoparticleincorporation.Opticaldataareusedin energy modellingstudiestoelucidatethefilmpotentialasanenergy-savingcoatinginarchitectural glazing.Theenergymodellingresultssuggestthatforwarmerclimatesthethermochromicnano- compositesinvestigatedhereleadtosignificantenergysavingswhencomparedwithplainglassand other standardindustryproducts.