简介：Thelayer-by-layercomplexationtechniqueofpolymerandmetalionwassuccessfullyutilizedtofabricatetheuhrathinmuhilayerfilmofpoly(3-thiopheneaceticacid(PTAA)andTb^3+ionbydippingthesubstratesalternativelyinpolymerandTb^3+ionaqueoussolutions.UV-vismeasurementrevealedthattheabsorbancehaslinearitywiththebilayernumberfromlayertolayerandtheX-rayphotoelectronspectrum(XPS)confirmedtheexistenceofTb^3+ion.ThepHofboththepolymerandTbCl3solutionsinfluencethethicknessdramaticallywhiletheconcentrationofthesolutionsisnotsosensitive.TheluminescentspectrumofthecomplexfilmshowsthecharacteristicemissionofTb^3+ionaswellastheligandindicatingtheformationofthecomplex.

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简介：Tobreakthroughthebottle-neckofquantumyieldinupconversion(UC)core-shellsystem,weelucidatedthattheenergytransferefficiencyincore-shellsystemhadanevidentcontributionfromthechargetransferofinterfacewithrelatedtotwofactors:(1)bandoffsetsand(2)bindingenergyareadensity.Thesetwovariablesweredeterminedbymaterialintrinsicpropertiesandcore-shellthicknessratio.Wefurtherunraveledthemechanismofnon-radiativeenergytransferbychargetransferinduceddipoleattheinterface,basedonaquasi-classicalderivationfromF?rstertyperesonantenergytransfer(FRET)model.Withstablebondingacrosstheinterface,thecontributionsonenergytransferinbothradiativeandnon-radiativeenergytransfershouldalsobeaccountedtogetherinAuzel'senergytransfer(ETU)modelincore-shellsystem.Basedonthediscussionaboutinterfacebonding,bandoffsets,andformationenergies,wefiguredoutthesignificanceofinterfacebondinginducedgapstates(IBIGS)thatplayedasignificantroleforinfluencingthechargetransferandradiativetypeenergytransfer.Theinterfacebandoffsetswereakeyfactorindominatingthenon-radiativeenergytransfer,whichwasalsocorrelatedtocore-shellthicknessratio.Wefoundthattheenergyareadensitywithrelatedtocore/shellthicknessratiofollowedthetrendofBoltzmansigmoidalgrowthfunction.Bythephysicaltrend,thisworkcontributedareferencehowthemulti-layeredcore-shellstructurewasformedstartingfromtheverybeginningwithinminimumsize.Aroutewaspavedtowardsasystematicstudyoftheinterfacetounveiltheenergytransfermechanismincore-shellsystems.