水溶性NaYF4BYb,Er纳米颗粒的溶剂热合成及其上转换发光性能/陈志钢等#5#*水溶性NaYF4BYb,Er纳米颗粒的溶剂热合成及其上转换发光性能陈志钢1,宋岳林1,田启威1,杨健茂2,胡俊青1(1东华大学材料科学与工程学院纤维材料改性国家重点实验室,上海201620;2东华大学分析测试中心,上海201620)摘要稀土上转换发光纳米材料具有极好的生物应用前景,但其应用的前提是能制备出水溶性、发光效率高的稀土纳米材料。以乙二醇为溶剂、稀土氯化物和NaF为反应物,采用简易的溶剂热法一步制备出水溶性的NaYF4BYb,Er纳米颗粒。NaYF4BYb,Er样品以粒径为25~40nm的球形颗粒为主,同时含有少量直径为25~40nm、长度为50~100nm的虫状纳米颗粒。该样品具有立方相结构,样品表面上的乙二醇配体使其能够很好地分散于水中。在980nm激光器激发下,NaYF4BYb,Er纳米颗粒水溶液展现了强的黄绿色上转换发光。因此该样品拥有良好的生物应用潜力。关键词NaYF4BYb,Er纳米颗粒水溶性溶剂热合成上转换发光SolvothermalSynthesisandUpconvertingLuminescentPropertiesofWater-solubleNaYF4BYb,ErNanoparticlesCHENZhigang1,SONGYuelin1,TIANQiwei1,YANGJianmao2,HUJunqing1(1StateKeyLaboratoryforModificationofChemicalFibersandPolymerMaterials,CollegeofMaterialsScienceandEngineering,DonghuaUniversity,Shanghai201620;2ResearchCenterforAnalysisandMeasurement,DonghuaUniversity,Shanghai201620)AbstractRare-earthupconvertingnanophosphorshavegreatsuperiorityasluminescentlabelingmaterialsforbiologicalapplications.Aprerequisitefortheirbiologicalapplicationsistogainaccesstopreparewater-solublenanopa-rticleswithappropriatefunctionalgroupsandhighluminescentefficiencies.Thewater-solubleNaYF4BYb,Ernano-particlesarepreparedbyasimplesolvothermalmethod,usingethyleneglycolasasolvent,rareearthchlorideandNaFasreactants.TheresultingNaYF4BYb,Ernanoparticlesaremainlysphericalparticleswithdiameterof25~40nm,andincludingasmallquantityofnano-wormswithdiameterof25~40nmandlengthof50~100nm.Theyexhibitcu-bic-phasestructure,andthepresenceofethyleneglycolligandsontheirsurfaceconfershighsolubilityinwater.Undercontinuous-waveexcitationof980nmlaser,aqueoussolutionofNaYF4BYb,Ernanoparticlesexhibitsstronglyyellow-greenupconvertingluminescence.Therefore,thepresentNaYF4BYb,Ernanoparticlesarepotentialcandidatesinbio-logicalapplications.KeywordsNaYF4BYb,Er,nanoparticles,watersolubility,solvothermalsynthesis,upconvertinglumines-cence乎无损伤、无背景荧光等。这些特征导致它们拥有广阔的生0引言物应用前景。本课题组已经利用UCNPs构建了高度灵敏的传统的生物荧光标记材料主要包括有机荧光染料[1]和DNA纳米传感器[5]