Selective synthesis of three-dimensional ZnO@Ag/SiO2@Ag nanorod arrays as surface-enhanced Raman scattering substrates with tunable interior dielectric layer

doi:10.1088/1674-1056/ab4d45

中国物理B ›› 2019, Vol. 28 ›› Issue (12): 124204-124204.doi: 10.1088/1674-1056/ab4d45

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Selective synthesis of three-dimensional ZnO@Ag/SiO₂@Ag nanorod arrays as surface-enhanced Raman scattering substrates with tunable interior dielectric layer

Jia-Jia Mu(牟佳佳), Chang-Yi He(何畅意), Wei-Jie Sun(孙伟杰), Yue Guan(管越)

1 College of Science, Beihua University, Jilin 132013, China;
2 Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China

收稿日期:2019-06-06 修回日期:2019-08-24 出版日期:2019-12-05 发布日期:2019-12-05
通讯作者: Jia-Jia Mu E-mail:allthat2010@126.com
基金资助:
Project supported by the Fund from the Science and Technology Department of Jilin Province, China (Grant No. 20170520108JH), the Beihua University Youth Nurtural Fund, China (Grant No. 2017QNJJL15), the Beihua University PhD Research Start-up Fund, China (Grant No. 202116140), and the Undergraduate Innovation Project, China (Grant No. 220718100).

Selective synthesis of three-dimensional ZnO@Ag/SiO₂@Ag nanorod arrays as surface-enhanced Raman scattering substrates with tunable interior dielectric layer

Jia-Jia Mu(牟佳佳)¹, Chang-Yi He(何畅意)¹, Wei-Jie Sun(孙伟杰)², Yue Guan(管越)¹

1 College of Science, Beihua University, Jilin 132013, China;
2 Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China

Received:2019-06-06 Revised:2019-08-24 Online:2019-12-05 Published:2019-12-05
Contact: Jia-Jia Mu E-mail:allthat2010@126.com
Supported by:
Project supported by the Fund from the Science and Technology Department of Jilin Province, China (Grant No. 20170520108JH), the Beihua University Youth Nurtural Fund, China (Grant No. 2017QNJJL15), the Beihua University PhD Research Start-up Fund, China (Grant No. 202116140), and the Undergraduate Innovation Project, China (Grant No. 220718100).

摘要/Abstract

摘要： We describe the synthesis of three-dimensional (3D) multilayer ZnO@Ag/SiO₂@Ag nanorod arrays by the physico-chemical method. The surface-enhanced Raman scattering (SERS) performance of the 3D multilayer ZnO@Ag/SiO₂@Ag nanorod arrays is studied by varying the thickness of dielectric layer SiO₂ and outer-layer noble Ag. The 3D ZnO@Ag/SiO₂@Ag nanorod arrays create a huge number of SERS “hot spots” that mainly contribute to the high SERS sensitivity. The great enhancement of SERS results from the electron transfer between ZnO and Ag and different electromagnetic enhancements of Ag nanoparticles (NPs) with different thicknesses. Through the finite-difference time-domain (FDTD) theoretical simulation, the enhancement of SERS signal can be ascribed to a strong electric field enhancement produced in the 3D framework. The simplicity and generality of our method offer great advantages for further understanding the SERS mechanism induced by the surface plasmon resonance (SPR) effect.

关键词: ZnO, multilayer composite structure, surface-enhanced Raman scattering (SERS), dielectric layer, electromagnetic field enhancement

Abstract: We describe the synthesis of three-dimensional (3D) multilayer ZnO@Ag/SiO₂@Ag nanorod arrays by the physico-chemical method. The surface-enhanced Raman scattering (SERS) performance of the 3D multilayer ZnO@Ag/SiO₂@Ag nanorod arrays is studied by varying the thickness of dielectric layer SiO₂ and outer-layer noble Ag. The 3D ZnO@Ag/SiO₂@Ag nanorod arrays create a huge number of SERS “hot spots” that mainly contribute to the high SERS sensitivity. The great enhancement of SERS results from the electron transfer between ZnO and Ag and different electromagnetic enhancements of Ag nanoparticles (NPs) with different thicknesses. Through the finite-difference time-domain (FDTD) theoretical simulation, the enhancement of SERS signal can be ascribed to a strong electric field enhancement produced in the 3D framework. The simplicity and generality of our method offer great advantages for further understanding the SERS mechanism induced by the surface plasmon resonance (SPR) effect.

Key words: ZnO, multilayer composite structure, surface-enhanced Raman scattering (SERS), dielectric layer, electromagnetic field enhancement

中图分类号: (Raman lasers)

42.55.Ye

02.70.Bf (Finite-difference methods) 42.62.Fi (Laser spectroscopy)

牟佳佳, 何畅意, 孙伟杰, 管越. Selective synthesis of three-dimensional ZnO@Ag/SiO₂@Ag nanorod arrays as surface-enhanced Raman scattering substrates with tunable interior dielectric layer[J]. 中国物理B, 2019, 28(12): 124204-124204.

Jia-Jia Mu(牟佳佳), Chang-Yi He(何畅意), Wei-Jie Sun(孙伟杰), Yue Guan(管越). Selective synthesis of three-dimensional ZnO@Ag/SiO₂@Ag nanorod arrays as surface-enhanced Raman scattering substrates with tunable interior dielectric layer[J]. Chin. Phys. B, 2019, 28(12): 124204-124204.

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Selective synthesis of three-dimensional ZnO@Ag/SiO₂@Ag nanorod arrays as surface-enhanced Raman scattering substrates with tunable interior dielectric layer

Selective synthesis of three-dimensional ZnO@Ag/SiO₂@Ag nanorod arrays as surface-enhanced Raman scattering substrates with tunable interior dielectric layer

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