Metal-enhanced fluorescence of lanthanide chelates near silver nanostructured films  

作　　者：YANG Guang WANG Ting WANG YueHui ZHOU Ji SUN Li 

机构地区：[1]State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China [2]General Research Institute for Nonferrous Metals, Beijing 100088, China

出　　处：《Chinese Science Bulletin》2010年第33期3746-3749,共4页

基　　金：supported by the National Natural Science Foundation of China(90922025,50632030,50621201 and 10774087)

摘　　要：Metal-enhanced fluorescence(MEF)from lanthanide chelates in close proximity to silver films was studied.Different thicknesses of silver films(20 and 50 nm)were deposited onto quartz substrates using magnetron sputtering,while silver island films were prepared using a previously published procedure.Obviously enhanced emissions from the lanthanide chelates were observed on the silver films.The effect of using different concentrations of aqueous solutions polyvinyl alcohol(PVA)on MEF was also investigated.Fluorescence close to a 20-nm-thick silver film showed that the enhancement of emission is a function of the thickness of the PVA film,reaching a maximum(～2.5-fold increase in intensity)at 83 nm.In conclusion,the MEF induced by the silver films is caused by an electric field effect arising from surface plasmon resonance.Metal-enhanced fluorescence （MEF） from lanthanide chelates in close proximity to silver films was studied. Different thicknesses of silver films （20 and 50 nm） were deposited onto quartz substrates using magnetron sputtering, while silver island films were prepared using a previously published procedure. Obviously enhanced emissions from the lanthanide~ chelates were observed on the silver films. The effect of using different concentrations of aqueous solutions polyvinyl alcohol （PVA） on MEF was also in- vestigated. Fluorescence close to a 20-nm-thick silver film showed that the enhancement of emission is a function of the thickness of the PVA film, reaching a maximum （-2.5-fold increase in intensity） at 83 nm. In conclusion, the MEF induced by the silver films is caused by an electric field effect arising from surface plasmon resonance.

关 键 词：稀土螯合物 纳米薄膜 银薄膜 荧光 金属 表面等离子体共振 聚乙烯醇 薄膜厚度 

分 类 号：O484.1[理学—固体物理] TQ133.3[理学—物理]