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Issue 23, 2017
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A close-packed 3D plasmonic superlattice of truncated octahedral gold nanoframes

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Abstract

We report the surface-enhanced Raman scattering (SERS) enhancement of three-dimensional (3D) close-packed plasmonic superlattices of truncated octahedral gold nanostructures. Experimentally, we resolved two different types of hot spots, one originates from the face-to-face contacts and the other is from the edge-to-edge contacts among the 3D close-packed plasmonic superlattice of gold nanostructures. The high degree of homogeneity of truncated octahedral Au@Pt nanoparticles (TOh Au@Pt NPs) and truncated octahedral Pt@Au nanoframes (TOh Pt@Au NFs) allowed them to self-assemble into remarkable 3D close-packed plasmonic superlattices. The morphological evolution and the corresponding optical behavior of TOh Pt@Au NFs were systematically monitored during each synthetic process. The measured SERS enhancement on the hot spots from the edge-to-edge contacts of TOh Pt@Au NFs was five times greater than the SERS response from the analogous face-to-face contacts of TOh Au@Pt NPs under the same given experimental conditions. The hollow interior and well-defined structural morphology of TOh Pt@Au NFs will allow researchers to design highly programmable 3D plasmonic superlattices for efficient SERS enhancement.

Graphical abstract: A close-packed 3D plasmonic superlattice of truncated octahedral gold nanoframes

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Publication details

The article was received on 22 Apr 2017, accepted on 10 May 2017 and first published on 11 May 2017


Article type: Communication
DOI: 10.1039/C7NR02856C
Citation: Nanoscale, 2017,9, 7708-7713
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    A close-packed 3D plasmonic superlattice of truncated octahedral gold nanoframes

    J. Yoon, H. Jang, I. Jung and S. Park, Nanoscale, 2017, 9, 7708
    DOI: 10.1039/C7NR02856C

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