title: Controlled plasmon enhanced fluorescence by silver nanoparticles deposited onto nanotube arrays.
abstract: Three-dimensional (3D) plasmonic nanostructures of porous alumina array (PAA) with silver nanoparticles (AgNPs) were prepared for enhancing fluorescence emission. In order to avoid fluorescence quenching effects and obtain clear fluorescence enhancement, the molecules were separated by using such 3D substrates, and the mean distance between the molecules and nanoparticles' surface can be easily controlled by changing the diameters of the PAA tube. It was found that the PAA tube with smaller size provides better fluorescence enhancement. Enhanced cross section, a new fluorescence enhanced factor, combined with the simulation of localized electromagnetic field enhancement was presented to understand the experimental results.
authors.affiliation: School of Physics and Information Technology, Shaanxi Normal University, 710062 Xi'an, People's Republic of China. Leibniz Institute of Photonic Technology, Albert-Einstein-Str. 9, 07745 Jena, Germany.
authors.forename: Zhenglong
authors.initials: Z
authors.lastname: Zhang
authors.forename: Yanni
authors.initials: Y
authors.lastname: Wu
authors.forename: Jun
authors.initials: J
authors.lastname: Dong
authors.forename: Wei
authors.initials: W
authors.lastname: Gao
authors.forename: Qingyan
authors.initials: Q
authors.lastname: Han
authors.forename: Hairong
authors.initials: H
authors.lastname: Zheng