Advertisement

Copper Nanoparticles Grafted on a Silicon Wafer and Their Excellent Surface-Enhanced Raman Scattering

Authors

  • Qi Shao,

    1. Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, P. R. China
    2. Department of Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, The University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
    Search for more papers by this author
  • Ronghui Que,

    1. Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, P. R. China
    Search for more papers by this author
  • Mingwang Shao,

    Corresponding author
    1. Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, P. R. China
    • Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, P. R. China
    Search for more papers by this author
  • Liang Cheng,

    1. Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, P. R. China
    Search for more papers by this author
  • Shuit-Tong Lee

    Corresponding author
    1. Center of Super-Diamond and Advanced Films, Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, P. R. China
    • Center of Super-Diamond and Advanced Films, Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, P. R. China.
    Search for more papers by this author

Abstract

Copper nanoparticles grafted on a silicon wafer are fabricated by reducing copper ions with silicon–hydrogen bonds and assembling them in situ on the Si wafer. The nanoparticles, with an average size of 20 nm, grow uniformly and densely on the Si wafer, and they are used as substrates for surface-enhanced Raman scattering. These substrates exhibit excellent enhancement in the low concentration detection (1 × 10−9 M) of rhodamine 6G with an enhancement factor (EF) of 2.29 × 107 and a relative standard deviation (RSD) of <20%. They are also employed to detect sudan-I dye with distinguished sensitivity and uniformity. The results are interesting and significant because Cu substrates are otherwise thought to be poor. These effects might provide new ways to think about surface-enhanced Raman scattering based on Cu substrates.

Ancillary