SERS study on the synergistic effects of electric field enhancement and charge transfer in an Ag2S quantum dots/plasmonic bowtie nanoantenna composite system
文献类型：期刊论文
| 作者 | B. Wang,C. Zhao,H. Y. Lu,T. T. Zou,S. C. Singh,Z. Yu,C. N. Yao,X. Zheng,J. Xing,Y. T. Zou,C. Z. Tong,W. L. Yu,B. Zhao and C. L. Guo |
| 刊名 | Photonics Research
 |
| 出版日期 | 2020 |
| 卷号 | 8期号:4页码:548-563 |
| ISSN号 | 2327-9125 |
| DOI | 10.1364/prj.383612 |
| 英文摘要 | Localized surface plasmon resonance (LSPR) of nanostructures and the interfacial charge transfer (CT) of semiconductor materials play essential roles in the study of optical and photoelectronic properties. In this paper, a composite substrate of Ag2S quantum dots (QDs) coated plasmonic Au bowtie nanoantenna (BNA) arrays with a metal insulator -metal (MIM) configuration was built to study the synergistic effect of LSPR and interfacial CT using surface-enhanced Raman scattering (SERS) in the near-infrared (NIR) region. The Au BNA array structure with a large enhancement of the localized electric field (E-field) strongly enhanced the Raman signal of adsorbed p-aminothiophenol (PATP) probe molecules. Meanwhile, the broad enhanced spectral region was achieved owing to the coupling of LSPR. The as-prepared Au BNA array structure facilitated enhancements of the excitation as well as the emission of Raman signal simultaneously, which was established by finite-difference time-domain simulation. Moreover, Ag2S semiconductor QDs were introduced into the BNA/PATP system to further enhance Raman signals, which benefited from the interfacial CT resonance in the BNA/Ag2S-QDs/PATP system. As a result, the Raman signals of PATP in the BNA/Ag2S-QDs/PATP system were strongly enhanced under 785 nm laser excitation due to the synergistic effect of E-field enhancement and interfacial CT. Furthermore, the SERS polarization dependence effects of the BNA/Ag2S-QDs/PATP system were also investigated. The SERS spectra indicated that the polarization dependence of the substrate increased with decreasing polarization angles (theta(pola)) of excitation from p-polarized (theta(pola) = 90 degrees) excitation to s-polarized (theta(pola) = 0 degrees) excitation. This study provides a strategy using the synergistic effect of interfacial CT and E-field enhancement for SERS applications and provides a guidance for the development of SERS study on semiconductor QD-based plasmonic substrates, and can be further extended to other material-nanostructure systems for various optoelectronic and sensing applications. (C) 2020 Chinese Laser Press |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| 源URL | [http://ir.ciomp.ac.cn/handle/181722/64876]  |
| 专题 | 中国科学院长春光学精密机械与物理研究所 |
| 推荐引用方式 GB/T 7714 | B. Wang,C. Zhao,H. Y. Lu,T. T. Zou,S. C. Singh,Z. Yu,C. N. Yao,X. Zheng,J. Xing,Y. T. Zou,C. Z. Tong,W. L. Yu,B. Zhao and C. L. Guo. SERS study on the synergistic effects of electric field enhancement and charge transfer in an Ag2S quantum dots/plasmonic bowtie nanoantenna composite system[J]. Photonics Research,2020,8(4):548-563. |
| APA | B. Wang,C. Zhao,H. Y. Lu,T. T. Zou,S. C. Singh,Z. Yu,C. N. Yao,X. Zheng,J. Xing,Y. T. Zou,C. Z. Tong,W. L. Yu,B. Zhao and C. L. Guo.(2020).SERS study on the synergistic effects of electric field enhancement and charge transfer in an Ag2S quantum dots/plasmonic bowtie nanoantenna composite system.Photonics Research,8(4),548-563. |
| MLA | B. Wang,C. Zhao,H. Y. Lu,T. T. Zou,S. C. Singh,Z. Yu,C. N. Yao,X. Zheng,J. Xing,Y. T. Zou,C. Z. Tong,W. L. Yu,B. Zhao and C. L. Guo."SERS study on the synergistic effects of electric field enhancement and charge transfer in an Ag2S quantum dots/plasmonic bowtie nanoantenna composite system".Photonics Research 8.4(2020):548-563. |
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