title: Plasmon-Modulated Excitation-Dependent Fluorescence from Activated CTAB Molecules Strongly Coupled to Gold Nanoparticles.
abstract: Excitation-dependent fluorophores (EDFs) have been attracted increasing attention owing to their high tunability of emissions and prospective applications ranging from multicolor patterning to bio-imaging. Here, we report tunable fluorescence with quenching dip induced by strong coupling of exciton and plasmon in the hybrid nanostructure of CTAB* EDFs and gold nanoparticles (AuNPs). The quenching dip in the fluorescence spectrum is tuned by adjusting excitation wavelength as well as plasmon resonance and concentration of AuNPs. The observed excitation-dependent emission spectra with quenching dip are theoretically reproduced and revealed to be induced by resonant energy transfer from multilevel EDFs with wider width channels to plasmonic AuNPs. These findings provide a new approach to prepare EDF molecules and a strategy to modulate fluorescence spectrum via exciton-to-plasmon energy transfer.
authors.affiliation: Department of Physics, Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, Wuhan University, Wuhan 430072, P. R. China.
authors.forename: Si-Jing
authors.initials: SJ
authors.lastname: Ding
authors.affiliation: Department of Physics, Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, Wuhan University, Wuhan 430072, P. R. China.
authors.forename: Fan
authors.initials: F
authors.lastname: Nan
authors.affiliation: Department of Physics, Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, Wuhan University, Wuhan 430072, P. R. China.
authors.forename: Xiao-Li
authors.initials: XL
authors.lastname: Liu
authors.affiliation: Department of Physics, Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, Wuhan University, Wuhan 430072, P. R. China.
authors.forename: Zhong-Hua
authors.initials: ZH
authors.lastname: Hao
authors.affiliation: Department of Physics, Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, Wuhan University, Wuhan 430072, P. R. China.
authors.forename: Li
authors.initials: L
authors.lastname: Zhou
authors.affiliation: Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
authors.forename: Jie
authors.initials: J
authors.lastname: Zeng
authors.affiliation: Department of Physics, Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, Wuhan University, Wuhan 430072, P. R. China.
authors.forename: Hong-Xing
authors.initials: HX
authors.lastname: Xu
authors.affiliation: Institute of Applied Physics and Computational Mathematics, Beijing 100088, P. R. China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Department of Physics, Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, Wuhan University, Wuhan 430072, P. R. China.|The Institute for Advanced Studies, Wuhan University, Wuhan 430072, P. R. China.
authors.forename: Qu-Quan
authors.initials: QQ
authors.lastname: Wang