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 |
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頁(從 - 到) | 8106-8111 |
頁數 | 6 |
期刊 | Inorganic Chemistry |
卷 | 50 |
發行號 | 17 |
DOIs | |
出版狀態 | Published - 2011 9月 5 |
All Science Journal Classification (ASJC) codes
- 物理與理論化學
- 無機化學