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Bian Y, Liu S, Zhang Y, Liu Y, Yang X, Lou S, Wu E, Wu B, Zhang X, Jin Q. Distance-Dependent Plasmon-Enhanced Fluorescence of Submonolayer Rhodamine 6G by Gold Nanoparticles. Nanoscale Res Lett 2021; 16:90. [PMID: 34021820 PMCID: PMC8141076 DOI: 10.1186/s11671-021-03546-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 05/13/2021] [Indexed: 05/22/2023]
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.
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Affiliation(s)
- Yajie Bian
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, 200241 People’s Republic of China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, 030006 Shanxi People’s Republic of China
| | - Shikang Liu
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, 200241 People’s Republic of China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, 030006 Shanxi People’s Republic of China
| | - Yuyi Zhang
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, 200241 People’s Republic of China
| | - Yiting Liu
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, 200241 People’s Republic of China
| | - Xiaoyu Yang
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, 200241 People’s Republic of China
| | - Shitao Lou
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, 200241 People’s Republic of China
| | - E. Wu
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, 200241 People’s Republic of China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, 030006 Shanxi People’s Republic of China
| | - Botao Wu
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, 200241 People’s Republic of China
| | - Xiaolei Zhang
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, 200241 People’s Republic of China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, 030006 Shanxi People’s Republic of China
| | - Qingyuan Jin
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, 200241 People’s Republic of China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, 030006 Shanxi People’s Republic of China
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