Distance-Dependent Plasmon-Enhanced Fluorescence of Submonolayer Rhodamine 6G by Gold Nanoparticles

Nanoscale Research Letters

Shitao Lou¹  Yiting Liu¹  E. Wu¹  Botao Wu¹  Xiaoyu Yang¹  Xiaolei Zhang¹  Yajie Bian¹  Yuyi Zhang¹  Shikang Liu¹  Qingyuan Jin¹ 

[1] State Key Laboratory of Precision Spectroscopy, East China Normal University;

关键词: Rhodamine 6G molecule;    Gold nanoparticles;    Poly (methyl methacrylate);    Photoluminescence;    Plasmon-enhanced fluorescence;    Quenching effect;   

DOI  :  10.1186/s11671-021-03546-7

来源: DOAJ

【 摘 要 】

Abstract We investigate the fluorescence from submonolayer rhodamine 6G molecules near gold nanoparticles (NPs) at a well-controlled poly (methyl methacrylate) (PMMA) interval thickness from 1.5 to 21 nm. The plasmonic resonance peaks of gold NPs are tuned from 530 to 580 nm by the PMMA spacer of different thicknesses. Then, due to the plasmonic resonant excitation enhancement, the emission intensity of rhodamine 6G molecules at 562 nm is found to be enhanced and shows a decline as the PMMA spacer thickness increases. The variation of spectral intensity simulated by finite-difference time-domain method is consistent with the experimental results. Moreover, the lifetime results show the combined effects to rhodamine 6G fluorescence, which include the quenching effect, the barrier effect of PMMA as spacer layer and the attenuation effect of PMMA films.

【 授权许可】

Unknown