A Comparative Study of Gold Nanocubes, Octahedra, and Rhombic Dodecahedra as Highly Sensitive SERS Substrates

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 foun...

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Published in:Inorganic chemistry 2011-09, Vol.50 (17), p.8106-8111
Main Authors: Wu, Hsin-Lun, Tsai, Huei-Ru, Hung, Yun-Ting, Lao, Ka-Un, Liao, Ching-Wen, Chung, Pei-Ju, Huang, Jer-Shing, Chen, I-Chia, Huang, Michael H
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cited_by cdi_FETCH-LOGICAL-a380t-ce7dfbb1d32e164185d24620870a220d734dc36c987af1678222bc7d54cdda8b3
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container_end_page 8111
container_issue 17
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container_title Inorganic chemistry
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creator Wu, Hsin-Lun
Tsai, Huei-Ru
Hung, Yun-Ting
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Chen, I-Chia
Huang, Michael H
description 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.
doi_str_mv 10.1021/ic200504n
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title A Comparative Study of Gold Nanocubes, Octahedra, and Rhombic Dodecahedra as Highly Sensitive SERS Substrates
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