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Title: Surface-Enhanced Raman Scattering (SERS) Studies of Disc-on-Pillar (DOP) Arrays: Contrasting Enhancement Factor with Analytical Performance

Abstract

The use of nanomachining methods capable of reproducible construction of nano-arrayed devices have revolutionized the field of plasmonic sensing by the introduction of a diversity of rationally engineered designs. Significant strides have been made to fabricate plasmonic platforms with tailored interparticle gaps to improve their performance for surface-enhanced Raman scattering (SERS) applications. Over time, a dichotomy has emerged in the implementation of SERS for analytical applications, the construction of substrates, optimization of interparticle spacing as a means to optimize electromagnetic field enhancement at the localized surface plasmon level, and the substrate sensitivity over extended areas to achieve quantitative performance. Here, we assessed the enhancement factor of plasmonic Ag/SiO 2/Si disc-on-pillar (DOP) arrays of variable pitch with its analytical performance for quantitative applications. Experimental data were compared with those from finite-difference time-domain (FDTD) simulations used in the optimization of the array dimensions. A self-assembled monolayer (SAM) of benzenethiol rendered highly reproducible signals (RSD ~4–10%) and SERS substrate enhancement factor (SSEF) values in the orders of 10 6–10 8 for all pitches. Furthermore, spectra corresponding to rhodamine 6G (R6G) and 4-aminobenzoic acid demonstrated the advantages of using the more densely packed DOP arrays with a 160 nm pitch (gap= 40 nm) formore » quantitation in spite of the strongest SSEF was attained for a pitch of 520 nm corresponding to a 400 nm gap.« less

Authors:
ORCiD logo [1];  [2];  [2];  [3];  [1]
  1. Univ. of Puerto Rico, Mayaguez (Puerto Rico)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1564208
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Applied Spectroscopy
Additional Journal Information:
Journal Volume: 73; Journal Issue: 6; Journal ID: ISSN 0003-7028
Publisher:
Society for Applied Spectroscopy
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Surface-enhanced Raman spectroscopy; SERS; nanofabrication; finite-difference time-domain; FDTD; calibration sensitivity; SERS substrate enhancement factor; disc-on-pillar

Citation Formats

Velez, Raymond A., Lavrik, Nickolay V., Kravchenko, Ivan I., Sepaniak, Michael J., and Jesus, Marco A. De. Surface-Enhanced Raman Scattering (SERS) Studies of Disc-on-Pillar (DOP) Arrays: Contrasting Enhancement Factor with Analytical Performance. United States: N. p., 2019. Web. doi:10.1177/0003702819846503.
Velez, Raymond A., Lavrik, Nickolay V., Kravchenko, Ivan I., Sepaniak, Michael J., & Jesus, Marco A. De. Surface-Enhanced Raman Scattering (SERS) Studies of Disc-on-Pillar (DOP) Arrays: Contrasting Enhancement Factor with Analytical Performance. United States. doi:10.1177/0003702819846503.
Velez, Raymond A., Lavrik, Nickolay V., Kravchenko, Ivan I., Sepaniak, Michael J., and Jesus, Marco A. De. Mon . "Surface-Enhanced Raman Scattering (SERS) Studies of Disc-on-Pillar (DOP) Arrays: Contrasting Enhancement Factor with Analytical Performance". United States. doi:10.1177/0003702819846503.
@article{osti_1564208,
title = {Surface-Enhanced Raman Scattering (SERS) Studies of Disc-on-Pillar (DOP) Arrays: Contrasting Enhancement Factor with Analytical Performance},
author = {Velez, Raymond A. and Lavrik, Nickolay V. and Kravchenko, Ivan I. and Sepaniak, Michael J. and Jesus, Marco A. De},
abstractNote = {The use of nanomachining methods capable of reproducible construction of nano-arrayed devices have revolutionized the field of plasmonic sensing by the introduction of a diversity of rationally engineered designs. Significant strides have been made to fabricate plasmonic platforms with tailored interparticle gaps to improve their performance for surface-enhanced Raman scattering (SERS) applications. Over time, a dichotomy has emerged in the implementation of SERS for analytical applications, the construction of substrates, optimization of interparticle spacing as a means to optimize electromagnetic field enhancement at the localized surface plasmon level, and the substrate sensitivity over extended areas to achieve quantitative performance. Here, we assessed the enhancement factor of plasmonic Ag/SiO2/Si disc-on-pillar (DOP) arrays of variable pitch with its analytical performance for quantitative applications. Experimental data were compared with those from finite-difference time-domain (FDTD) simulations used in the optimization of the array dimensions. A self-assembled monolayer (SAM) of benzenethiol rendered highly reproducible signals (RSD ~4–10%) and SERS substrate enhancement factor (SSEF) values in the orders of 106–108 for all pitches. Furthermore, spectra corresponding to rhodamine 6G (R6G) and 4-aminobenzoic acid demonstrated the advantages of using the more densely packed DOP arrays with a 160 nm pitch (gap= 40 nm) for quantitation in spite of the strongest SSEF was attained for a pitch of 520 nm corresponding to a 400 nm gap.},
doi = {10.1177/0003702819846503},
journal = {Applied Spectroscopy},
number = 6,
volume = 73,
place = {United States},
year = {2019},
month = {5}
}

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Works referenced in this record:

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