A comparative study of gold nanocubes, octahedra, and rhombic dodecahedra as highly sensitive SERS substrates

Hsin Lun Wu, Huei Ru Tsai, Yun Ting Hung, Ka Un Lao, Ching Wen Liao, Pei Ju Chung, Jer Shing Huang, I. Chia Chen, Michael H. Huang

研究成果: Article同行評審

85 引文 斯高帕斯(Scopus)

摘要

Gold nanocubes, octahedra, and rhombic dodecahedra with roughly two sets of particle sizes have been successfully synthesized via a seed-mediated growth approach. All six samples were analyzed for comparative surface-enhanced Raman scattering (SERS) activity. All of these Au nanostructures were found to yield strong enhancement at a thiophenol concentration of 10-7 M and are excellent SERS substrates. Rhombic dodecahedra with a rhombus edge length of 32 nm showed significantly better enhancement than the other samples and can reach a detection limit of 10-8 M. Simulations of the binding energies of thiophenol on the different faces of gold and electric near-field intensities of these nanocrystals have been performed to evaluate the experimental results. Superior SERS activity of these nanocrystals can be expected toward the detection of many other molecules.

原文English
頁(從 - 到)8106-8111
頁數6
期刊Inorganic Chemistry
50
發行號17
DOIs
出版狀態Published - 2011 九月 5

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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