Chinese Optics Letters, Volume. 21, Issue 11, 113001(2023)

Improvement of Raman spectrum uniformity of SERS substrate based on flat electrode

Zhihui Jiang1, Shen Zhang1, Congxi Song1, Hongmin Mao1, Xin Zhao2, Huanjun Lu1、*, and Zhaoliang Cao1、**
Author Affiliations
  • 1Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou 215009, China
  • 2School of Chemistry and Life Sciences, Suzhou University of Science and Technology, Suzhou 215009, China
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    Figures & Tables(13)
    Schematic diagram showing the electrodeposition process.
    Relationship between the number of deposited particles and the distance of the electrodes.
    Selected scan position and area of (a) the silver plate and (b) the ITO glass by the probe-type surface contouring instrument.
    Profiles of the electrode surfaces: (a) silver plate; (b) ITO glass.
    Schematic representation of the electrochemical deposition of the SERS substrate: (a) phase states of lyotropic LC; (b) synergistic growth process of silver nanoflowers in electrodeposition.
    SEM characterization of the SERS substrate prepared with the silver plate as an anode: (a) the five chosen positions on the fabricated SERS substrate; (b)–(f) surface morphologies at Positions 1–5; (g) zoom-in image of the formed silver nanoflower.
    (a)–(e) Surface morphologies at Positions 1–5 of the SERS substrate prepared with the ITO glass as an anode.
    SEM images used for surface coverage calculation: (a) gray-scale image; (b) binarized image.
    Comparison of surface coverage of SERS substrates fabricated from the silver plate and ITO glass anodes.
    Schematic diagram of the distance of electrodes with the silver plate (left) and the ITO glass (right) as the anode.
    Comparison of the simulation and experimental surface distribution uniformity of the SERS substrate fabricated from (a) a silver plate anode and (b) an ITO glass anode.
    Raman spectrum detected at different positions of the substrate fabricated from (a) a silver plate anode and (b) an ITO glass anode; (c) comparison of their peak intensities at 613 cm-1; (d) Raman spectroscopy detection of R6G on a silicon wafer.
    • Table 1. Parameters Used in the Simulation

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      Table 1. Parameters Used in the Simulation

      ParameterDefinitionValue
      qCharge amount of the silver ion1.6 × 10-19 C
      UElectrodeposition voltage5 V
      mMass of the silver ion2.8 × 10-22 g
      tElectrochemical reaction time10,800 s
      N1Number of silver ions per unit volume3.6 × 107
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    Zhihui Jiang, Shen Zhang, Congxi Song, Hongmin Mao, Xin Zhao, Huanjun Lu, Zhaoliang Cao. Improvement of Raman spectrum uniformity of SERS substrate based on flat electrode[J]. Chinese Optics Letters, 2023, 21(11): 113001

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    Paper Information

    Category: Spectroscopy

    Received: Jan. 6, 2023

    Accepted: Jul. 6, 2023

    Posted: Jul. 6, 2023

    Published Online: Nov. 9, 2023

    The Author Email: Huanjun Lu (luhuanjun@usts.edu.cn), Zhaoliang Cao (caozl@usts.edu.cn)

    DOI:10.3788/COL202321.113001

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