中国物理B ›› 2022, Vol. 31 ›› Issue (7): 77401-077401.doi: 10.1088/1674-1056/ac4f51

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SERS activity of carbon nanotubes modified by silver nanoparticles with different particle sizes

Xiao-Lei Zhang(张晓蕾)1,2,†, Jie Zhang(张洁)3, Yuan Luo(罗元)1, and Jia Ran(冉佳)1,2   

  1. 1 Chongqing Municipal Level Key Laboratory of Photoelectronic Information Sensing and Transmitting Technology, College of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China;
    2 Postdoctoral Research Center of Chongqing Key Laboratory of Optoelectronic Information Sensing and Transmission Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China;
    3 Key Laboratory of Optoelectronic Technology&System, Ministry of Education, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China
  • 收稿日期:2021-12-15 修回日期:2022-01-19 接受日期:2022-01-27 出版日期:2022-06-09 发布日期:2022-07-19
  • 通讯作者: Xiao-Lei Zhang E-mail:zhangxiaolei@cqupt.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 61875024), the Natural Science Foundation of Chongqing, China (Grant Nos. cstc2019jcyjmsxmX0639 and cstc2020jcyj-msxm0605), and the Scientific and Technology Research Program of Chongqing Municipal Education Commission, China (Grant Nos. KJQN202000648 and KJQN201900602).

SERS activity of carbon nanotubes modified by silver nanoparticles with different particle sizes

Xiao-Lei Zhang(张晓蕾)1,2,†, Jie Zhang(张洁)3, Yuan Luo(罗元)1, and Jia Ran(冉佳)1,2   

  1. 1 Chongqing Municipal Level Key Laboratory of Photoelectronic Information Sensing and Transmitting Technology, College of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China;
    2 Postdoctoral Research Center of Chongqing Key Laboratory of Optoelectronic Information Sensing and Transmission Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China;
    3 Key Laboratory of Optoelectronic Technology&System, Ministry of Education, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China
  • Received:2021-12-15 Revised:2022-01-19 Accepted:2022-01-27 Online:2022-06-09 Published:2022-07-19
  • Contact: Xiao-Lei Zhang E-mail:zhangxiaolei@cqupt.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 61875024), the Natural Science Foundation of Chongqing, China (Grant Nos. cstc2019jcyjmsxmX0639 and cstc2020jcyj-msxm0605), and the Scientific and Technology Research Program of Chongqing Municipal Education Commission, China (Grant Nos. KJQN202000648 and KJQN201900602).

摘要: A two-dimensional (2D) surface-enhanced Raman scattering (SERS) substrate is fabricated by decorating carbon nanotube (CNT) films with Ag nanoparticles (AgNPs) in different sizes, via simple and low-cost chemical reduction method and self-assembling method. The change of Raman and SERS activity of carbon nanotubes/Ag nanoparticles (CNTs/AgNPs) composites with varying size of AgNPs are investigated by using rhodamine 6G (R6G) as a probe molecule. Meanwhile, the scattering cross section of AgNPs and the distribution of electric field of CNTs/AgNPs composite are simulated through finite difference time domain (FDTD) method. Surface plasmon resonance (SPR) wavelength is redshifted as the size of AgNPs increases, and the intensity of SERS and electric field increase with AgNPs size increasing. The experiment and simulation results show a Raman scattering enhancement factor (EF) of 108 for the hybrid substrate.

关键词: Raman spectroscopy, surface-enhanced Raman scattering (SERS), carbon nanotubes, silver nanoparticles

Abstract: A two-dimensional (2D) surface-enhanced Raman scattering (SERS) substrate is fabricated by decorating carbon nanotube (CNT) films with Ag nanoparticles (AgNPs) in different sizes, via simple and low-cost chemical reduction method and self-assembling method. The change of Raman and SERS activity of carbon nanotubes/Ag nanoparticles (CNTs/AgNPs) composites with varying size of AgNPs are investigated by using rhodamine 6G (R6G) as a probe molecule. Meanwhile, the scattering cross section of AgNPs and the distribution of electric field of CNTs/AgNPs composite are simulated through finite difference time domain (FDTD) method. Surface plasmon resonance (SPR) wavelength is redshifted as the size of AgNPs increases, and the intensity of SERS and electric field increase with AgNPs size increasing. The experiment and simulation results show a Raman scattering enhancement factor (EF) of 108 for the hybrid substrate.

Key words: Raman spectroscopy, surface-enhanced Raman scattering (SERS), carbon nanotubes, silver nanoparticles

中图分类号:  (Raman and optical spectroscopy)

  • 74.25.nd
78.30.-j (Infrared and Raman spectra) 36.20.Ng (Vibrational and rotational structure, infrared and Raman spectra)