title: Stepwise synthesis of cubic Au-AgCdS core-shell nanostructures with tunable plasmon resonances and fluorescence.
abstract: Cubic Au-AgCdS core-shell nanostructures were synthesized through cation exchange method assisted by tributylphosphine (TBP) as a phase-transfer agent. Among intermediate products, Au-Ag core-shell nanocubes exhibited many high-order plasmon resonance modes related to the special cubic shape, and these plasmon bands red-shifted along with the increasing of particle size. The plasmon band of Au core first red-shifted and broadened at the step of Au-Ag₂S and then blue-shifted and narrowed at the step of Au-AgCdS. Since TBP was very crucial for the efficient conversion from Ag₂S to CdS, we found that both absorption and fluorescence of the final products could be controlled by TBP.
authors.forename: Xiao-Li
authors.initials: XL
authors.lastname: Liu
authors.forename: Shan
authors.initials: S
authors.lastname: Liang
authors.forename: Fan
authors.initials: F
authors.lastname: Nan
authors.forename: Yue-Yue
authors.initials: YY
authors.lastname: Pan
authors.forename: Jun-Jun
authors.initials: JJ
authors.lastname: Shi
authors.forename: Li
authors.initials: L
authors.lastname: Zhou
authors.forename: Shuang-Feng
authors.initials: SF
authors.lastname: Jia
authors.forename: Jian-Bo
authors.initials: JB
authors.lastname: Wang
authors.forename: Xue-Feng
authors.initials: XF
authors.lastname: Yu
authors.forename: Qu-Quan
authors.initials: QQ
authors.lastname: Wang