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

doi:10.1021/ic200504n

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

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

104 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	8106-8111
Number of pages	6
Journal	Inorganic Chemistry
Volume	50
Issue number	17
DOIs	https://doi.org/10.1021/ic200504n
Publication status	Published - 2011 Sep 5

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry
Inorganic Chemistry

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10.1021/ic200504n

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

abstract = "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.",

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

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AU - Wu, Hsin Lun

AU - Tsai, Huei Ru

AU - Hung, Yun Ting

AU - Lao, Ka Un

AU - Liao, Ching Wen

AU - Chung, Pei Ju

AU - Huang, Jer Shing

AU - Chen, I. Chia

AU - Huang, Michael H.

PY - 2011/9/5

Y1 - 2011/9/5

N2 - 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.

AB - 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.

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

Abstract

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