荧光超疏水(4)

Large-scaleandexionaluorescentsuperhydrophobiclmTheelectrochemicaldepositiontechniqueprovidesafacileandcontrollablewaytopreparerapidlythelarge-areap-conjugatedpolymerlmsonthevariousconductingsubstrates,includingstainlesssteelsheets,stainlesssteelwovenwiremesh,titaniumsheets,AgsheetsandplastictransparentITO-PETlms.Inthiswork,forfurtherinvestigatingthepotentialapplicationsoftheFPSHlm,suchasindisplaydevicesorluminoussigns,thelarge-scaleandexionalFPSHlmswerepreparedbyelectro-depositingpolypyreneonaconductingstainlesssteelwovenwiremeshandaplastictransparentITO-PETlm(Fig.5).AsshowninFig.5a,theyellowFPSHlmcanadherewelltothelargestainlesssteelwovenwiremesh.TheFPSH-enclosingstainlesssteelwovenwiremeshpresentsasuperhydrophobicitywith4mLWCAof162???1??(insetofFig.5a),andthewaterdroplets(20–30mL)drippingonsuchasurfacedonotstickbutrollo?rapidly,indicatingtheself-cleaningproperty(MovieS2andS3?).Whenexposedto365nmUVlight,theFPSH-enclos-ingstainlesssteelwovenwiremeshemittedabrightblue-greenuorescenceatalargescale,indicatingitsgooduorescenceproperties(Fig.5b).Themeshyuorescencepatternsalsocanbeobservedcleanlyinitsuorescencemicroscopepictureexcitedbythebluelight,furtherindicatingthattheFPSHlmenclosedthestainlesssteelwovenwiremeshverywell(insetofFig.5b).Interestingly,althoughtheuorescentpolypyrenemoietiesintheFPSHlmwereseparatedfromthespeciesinaqueoussolutionbythesuperhydrophobicsurface,thelow-costFPSH-enclosingstainlesssteelwovenwiremeshcanalsobeusedasachemicalsensorinthelow-surface-energyorganic

Thisjournalis?TheRoyalSocietyofChemistry2015(WCA:ca.162???1??).(b)TheFPSH?lmonthestainlesssteelwovenwiremeshemittedtheblue-green?uorescenceunderUVlightof365nm.Inset:the?uorescencemicroscopepictureofthestainlesssteelwovenwiremeshenclosedbythe?uorescentFPSH?lmexcitedbythebluelight.Thescalebaris200mm.(c)TheFPSH?lmpreparedontheplastictransparentITO-PET?lmsubstrate.(d)Thecurved?uorescentFPSH?lmontheITO-PETsubstrateunderUVlightof365nm.

solution(suchasthe4-nitrobenzenechlorideinanethanolsolution)(Fig.S13andS14?).

Similarly,theFPSH-coatingplastictransparentITO-PETlmalsoexhibitsthelarge-scaleandexionaluorescentsuper-hydrophobicity,asevidencedbyitscurvedluminescencesurfaceexcitedat365nmanditshighWCAofabout160.5???1??(Fig.5canddandS15andMovieS4?).Theselarge-scaleandexionaluorescentsuperhydrophobiclmspreparedbytheelectrochemicalstrategymayhaveagooduseinmanypracticalapplications.

Conclusions

Inconclusion,wedevelopedauorescentandsuperhydrophobicself-cleaningcoatingbasedonauorinatedelectrodeposited-polypyrene/silicahybridlm.Theelectrodepositedpolypyrenelmhasapetal-likeporousstructureandstronguorescence,whichisadvantageousforthefabricationofsuperhydrophobiccoatingswithuorescenceproperties.Toprotectthefragilestructureofthepolypyrenelmandimproveitswater-impactresistance,wecoatedthelmwithasilicalayermadeviaCVD.Aeruorination,theas-preparedFPSHlmnotonlyexhibitedasuperhydrophobicself-cleaningsurfacewithastaticwatercontactangleof163???1??andaslidingangleof4???1??,butalsoideallyinheritedtheexcellentblue-greenuorescenceofthepolypyrenelm.Theuorescencecanbeattributedtotheexcimeremissioninthepolypyrenelm.Thisuorescentsuperhydrophobicbifunctionalcoatingwasfoundtobeabletowithstandharshenvironmentaltests.Aerhigh-temperatureannealing,upto200??Cfor1hinair,itssuperhydrophobicityanduorescenceremainedalmostunchanged.Thecoatingalsoshowedastrongrepellencetoacidorbasedroplets,andastrongwaterdropletimpactresistance.Furthermore,suchaFPSHlmalsocanbepreparedreadilyonthelarge-scaleandexionalconductingsubstrates,suchasthesteelwovenwiremeshandplastictransparentITO-PETlm.Theuorescentand

robust

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superhydrophobicself-cleaningcoatingswouldhavepotentialapplicationsinphotoluminescencewindows,sensors,externalsigncoatings,andsoon.

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Acknowledgements

3/2015 02:44:39.

Thisworkwassupportedby973Projects(2012CB933803and2014CB643605),theNationalScienceFundforDistinguishedYoungScholars(50925310),theNationalScienceFoundationofChina(21374060and51173103),andExcellentAcademicLeadersofShanghai(11XD1403000).

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