【摘要】 构建了银纳米立方体/PE/金膜三明治结构用于拉曼检测,由于这种结构的场增强特性,一般认为它用于荧光增强也能有较好的性能,在实际测试中发现两者并不完全相同,主要是由于物质分子与纳米颗粒靠近时有荧光猝灭现象。为了尽可能消除荧光猝灭现象,探究场增强基底最强荧光增强能力,更改了中间层的厚度和物质分子在中间层的位置,获得最强荧光增强光谱。这种能够使荧光增强的结构对研究下一代纳米光子学器件在荧光检测上的应用有启示意义;同时,也为开发具有更强大检测功能的拉曼-荧光双检测器提供可参照的模板。更多还原

【Abstract】 A silver nanocube/PE/gold film sandwich structure for Raman detection was constructed,and due to the field enhancement properties of this structure,it is generally believed that it can also have good performance for fluorescence enhancement,which we found in the actual test is true,mainly due to the fluorescence giemcjomg phenomenon when the substance molecules are close to the nanoparticles.In order to eliminate the fluorescence guenching phenomenon as much as possible and explore the strongest fluorescence enhancement ability of the field-enhanced substrate,we changed the thickness of the intermediate layer and the position of the substance molecules in the intermediate layer to obtain the strongest fluorescence enhancement spectrum.This structure that enables fluorescence enhancement is enlightening for the study of next-generation nanophotonics devices for fluorescence detection;it also provides a referenceable template for the development of Raman-fluorescence dual-testlng eguipment with more powerful detection capabilities.更多还原