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Title: 3D Plasmon Coupling Assisted Sers on Nanoparticle-Nanocup Array Hybrids

Abstract

Unique colorimetric optical properties of nanomaterials can effectively influence the light absorption or emission of molecules. Here, we design plasmonic substrate for surface-enhanced Raman scattering (SERS) by inducing three-dimensional (3D) hot spots on the sensing surface. The 3D hot spots are formed by the self-assembly of plasmonic nanoparticles (NPs) on a 3D plasmonic nanocup array structure. This 3D hot spot formation on the periodic nanocup arrays achieves much higher SERS enhancement factor than the 2D NP arrays, which have been conventionally sought SERS substrates. We also utilize the colorimetric properties of the nanocup arrays for an additional degree of SERS enhancement. Colorimetry, achieved by tunable plasmon resonance wavelength by controlling dielectric property on the nanocup array surface, eases the modulation of the plasmonic resonance condition without modifying the nanostructure design. By continuously monitoring the shifts of the plasmon resonance condition and its effect on the light absorption and emission of the nearby molecules, we verify that larger SERS enhancement is achieved when the plasmon resonance wavelength is matched with the Raman excitation wavelength. In conclusion, the ease of plasmon resonance tuning of this nanocup array-nanoparticle hybrid structure allows versatile SERS enhancement for a variety of different Raman measurement conditions.

Authors:
 [1];  [1];  [1]
  1. Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States)
Publication Date:
Research Org.:
Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1500106
Grant/Contract Number:  
FG02-07ER46453; FG02-07ER46471
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Seo, Sujin, Chang, Te -Wei, and Liu, Gang Logan. 3D Plasmon Coupling Assisted Sers on Nanoparticle-Nanocup Array Hybrids. United States: N. p., 2018. Web. doi:10.1038/s41598-018-19256-7.
Seo, Sujin, Chang, Te -Wei, & Liu, Gang Logan. 3D Plasmon Coupling Assisted Sers on Nanoparticle-Nanocup Array Hybrids. United States. doi:10.1038/s41598-018-19256-7.
Seo, Sujin, Chang, Te -Wei, and Liu, Gang Logan. Wed . "3D Plasmon Coupling Assisted Sers on Nanoparticle-Nanocup Array Hybrids". United States. doi:10.1038/s41598-018-19256-7. https://www.osti.gov/servlets/purl/1500106.
@article{osti_1500106,
title = {3D Plasmon Coupling Assisted Sers on Nanoparticle-Nanocup Array Hybrids},
author = {Seo, Sujin and Chang, Te -Wei and Liu, Gang Logan},
abstractNote = {Unique colorimetric optical properties of nanomaterials can effectively influence the light absorption or emission of molecules. Here, we design plasmonic substrate for surface-enhanced Raman scattering (SERS) by inducing three-dimensional (3D) hot spots on the sensing surface. The 3D hot spots are formed by the self-assembly of plasmonic nanoparticles (NPs) on a 3D plasmonic nanocup array structure. This 3D hot spot formation on the periodic nanocup arrays achieves much higher SERS enhancement factor than the 2D NP arrays, which have been conventionally sought SERS substrates. We also utilize the colorimetric properties of the nanocup arrays for an additional degree of SERS enhancement. Colorimetry, achieved by tunable plasmon resonance wavelength by controlling dielectric property on the nanocup array surface, eases the modulation of the plasmonic resonance condition without modifying the nanostructure design. By continuously monitoring the shifts of the plasmon resonance condition and its effect on the light absorption and emission of the nearby molecules, we verify that larger SERS enhancement is achieved when the plasmon resonance wavelength is matched with the Raman excitation wavelength. In conclusion, the ease of plasmon resonance tuning of this nanocup array-nanoparticle hybrid structure allows versatile SERS enhancement for a variety of different Raman measurement conditions.},
doi = {10.1038/s41598-018-19256-7},
journal = {Scientific Reports},
number = 1,
volume = 8,
place = {United States},
year = {2018},
month = {2}
}

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Works referenced in this record:

Shell-isolated nanoparticle-enhanced Raman spectroscopy
journal, March 2010

  • Li, Jian Feng; Huang, Yi Fan; Ding, Yong
  • Nature, Vol. 464, Issue 7287, p. 392-395
  • DOI: 10.1038/nature08907