Tam Felicia, Goodrich Glenn P, Johnson Bruce R, Halas Naomi J
Department of Physics and Astronomy, Rice University, 6100 Main Street, Houston, Texas 77005, USA.
Nano Lett. 2007 Feb;7(2):496-501. doi: 10.1021/nl062901x. Epub 2007 Jan 27.
Metallic nanoparticles are known to dramatically modify the spontaneous emission of nearby fluorescent molecules and materials. Here we examine the role of the nanoparticle plasmon resonance energy and nanoparticle scattering cross section on the fluorescence enhancement of adjacent indocyanine green (ICG) dye molecules. We find that enhancement of the molecular fluorescence by more than a factor of 50 can be achieved for ICG next to a nanoparticle with a large scattering cross section and a plasmon resonance frequency corresponding to the emission frequency of the molecule.
众所周知，金属纳米颗粒会显著改变附近荧光分子和材料的自发发射。在此，我们研究了纳米颗粒等离子体共振能量和纳米颗粒散射截面在相邻吲哚菁绿（ICG）染料分子荧光增强中的作用。我们发现，对于紧邻具有大散射截面且等离子体共振频率与分子发射频率相对应的纳米颗粒的ICG，分子荧光可增强50倍以上。
