Issue 18, 2015

Guided formation of sub-5 nm interstitial gaps between plasmonic nanodisks

Abstract

To achieve a reliable formation of a surface-enhanced Raman scattering (SERS) sensor with evenly distributed hot spots on a wafer scale substrate, we propose a hybrid approach combining physical nanolithography for preparing Au nanodisks and chemical Au reduction for growing them. During the chemical growth, the interstitial distance between the nanodisks decreased from 60 nm to sub-5 nm. The resulting patterns of the nanogap-rich Au nanodisks successfully enhance the SERS signal, and its intensity map shows only a 5% or less signal variation on the entire sample.

Graphical abstract: Guided formation of sub-5 nm interstitial gaps between plasmonic nanodisks

Supplementary files

Article information

Article type
Communication
Submitted
27 Feb 2015
Accepted
06 Apr 2015
First published
13 Apr 2015

Nanoscale, 2015,7, 8338-8342

Author version available

Guided formation of sub-5 nm interstitial gaps between plasmonic nanodisks

J. G. Son, S. W. Han, J. Wi and T. G. Lee, Nanoscale, 2015, 7, 8338 DOI: 10.1039/C5NR01317H

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