Goldys Ewa M, Drozdowicz-Tomsia Krystyna, Xie Fang, Shtoyko Tanya, Matveeva Eva, Gryczynski Ignacy, Gryczynski Zygmunt
Macquarie University Biotechnology Research Institute, North Ryde 2109 NSW Australia.
J Am Chem Soc. 2007 Oct 10;129(40):12117-22. doi: 10.1021/ja071981j. Epub 2007 Sep 13.
Electrochemically deposited silver structures with nanowires 50-100 nm in diameter show high fluorescence amplification and strongly reduced fluorescence lifetimes. Both quantities depend on the structure thickness. With increasing thickness the fluorescence amplification proportionally increases and the fluorescence lifetime decreases. This thickness dependence is caused by fluorophore interaction with a system of plasmon excitations in coupled nanowires extending over micrometer size regions. Thus the amplification is attributed to a combination of extended structure area and strong plasmonic coupling between nanowires which also help to radiatively scatter the fluorescence emission.
直径为50 - 100纳米的电化学沉积银纳米线结构表现出高荧光放大和显著降低的荧光寿命。这两个量都取决于结构厚度。随着厚度增加，荧光放大成比例增加，荧光寿命降低。这种厚度依赖性是由荧光团与耦合纳米线中延伸超过微米尺寸区域的等离子体激元激发系统相互作用引起的。因此，放大归因于结构面积的扩大和纳米线之间强烈的等离子体耦合，这也有助于荧光发射的辐射散射。
