Stepwise synthesis of cubic Au-AgCdS core-shell nanostructures with tunable plasmon resonances and fluorescence

作者：Liu, Xiao-Li; Liang, Shan; Nan, Fan; Pan, Yue-Yue; Shi, Jun-Jun; Zhou, Li^*; Jia, Shuang-Feng; Wang, Jian-Bo; Yu, Xue-Feng; Wang, Qu-Quan

来源：Optics Express, 2013, 21(21): 24793-24798.

DOI：10.1364/OE.21.024793

• OPTICAL-PROPERTIES
• QUANTITATIVE-ANALYSIS
• METAL NANOPARTICLES
• GOLD NANOCUBES
• NANOCRYSTALS
• NANORODS
• SULFIDE
• LUMINESCENCE
• ABSORPTION
• GROWTH

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.

• 出版日期2013-10-21
• 单位武汉大学