Issue 23, 2017

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

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

Supplementary files

Article information

Article type
Communication
Submitted
22 Apr 2017
Accepted
10 May 2017
First published
11 May 2017

Nanoscale, 2017,9, 7708-7713

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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