Refractive index sensing and surface-enhanced Raman spectroscopy using silver–gold layered bimetallic plasmonic crystals
Abstract
Herein we describe the fabrication and characterization of Ag and Au bimetallic plasmonic crystals as a system that exhibits improved capabilities for quantitative, bulk refractive index (RI) sensing and surface-enhanced Raman spectroscopy (SERS) as compared to monometallic plasmonic crystals of similar form. The sensing optics, which are bimetallic plasmonic crystals consisting of sequential nanoscale layers of Ag coated by Au, are chemically stable and useful for quantitative, multispectral, refractive index and spectroscopic chemical sensing. Compared to previously reported homometallic devices, the results presented herein illustrate improvements in performance that stem from the distinctive plasmonic features and strong localized electric fields produced by the Ag and Au layers, which are optimized in terms of metal thickness and geometric features. Finite-difference time-domain (FDTD) simulations theoretically verify the nature of the multimode plasmonic resonances generated by the devices and allow for a better understanding of the enhancements in multispectral refractive index and SERS-based sensing. Taken together, these results demonstrate a robust and potentially useful new platform for chemical/spectroscopic sensing.
- Authors:
-
- Univ. of Illinois at Urbana-Champaign, IL (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Publication Date:
- Research Org.:
- California Institute of Technology (CalTech), Pasadena, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1628617
- Grant/Contract Number:
- SC0001293
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Beilstein Journal of Nanotechnology
- Additional Journal Information:
- Journal Volume: 8; Journal ID: ISSN 2190-4286
- Publisher:
- Beilstein Institute
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 77 NANOSCIENCE AND NANOTECHNOLOGY; Science & Technology - Other Topics; Materials Science; Physics; finite-difference time-domain; nanoimprint soft lithography; plasmonics; surface plasmon resonance
Citation Formats
Kang, Somi, Lehman, Sean E., Schulmerich, Matthew V., Le, An-Phong, Lee, Tae-woo, Gray, Stephen K., Bhargava, Rohit, and Nuzzo, Ralph G. Refractive index sensing and surface-enhanced Raman spectroscopy using silver–gold layered bimetallic plasmonic crystals. United States: N. p., 2017.
Web. doi:10.3762/bjnano.8.249.
Kang, Somi, Lehman, Sean E., Schulmerich, Matthew V., Le, An-Phong, Lee, Tae-woo, Gray, Stephen K., Bhargava, Rohit, & Nuzzo, Ralph G. Refractive index sensing and surface-enhanced Raman spectroscopy using silver–gold layered bimetallic plasmonic crystals. United States. https://doi.org/10.3762/bjnano.8.249
Kang, Somi, Lehman, Sean E., Schulmerich, Matthew V., Le, An-Phong, Lee, Tae-woo, Gray, Stephen K., Bhargava, Rohit, and Nuzzo, Ralph G. Fri .
"Refractive index sensing and surface-enhanced Raman spectroscopy using silver–gold layered bimetallic plasmonic crystals". United States. https://doi.org/10.3762/bjnano.8.249. https://www.osti.gov/servlets/purl/1628617.
@article{osti_1628617,
title = {Refractive index sensing and surface-enhanced Raman spectroscopy using silver–gold layered bimetallic plasmonic crystals},
author = {Kang, Somi and Lehman, Sean E. and Schulmerich, Matthew V. and Le, An-Phong and Lee, Tae-woo and Gray, Stephen K. and Bhargava, Rohit and Nuzzo, Ralph G.},
abstractNote = {Herein we describe the fabrication and characterization of Ag and Au bimetallic plasmonic crystals as a system that exhibits improved capabilities for quantitative, bulk refractive index (RI) sensing and surface-enhanced Raman spectroscopy (SERS) as compared to monometallic plasmonic crystals of similar form. The sensing optics, which are bimetallic plasmonic crystals consisting of sequential nanoscale layers of Ag coated by Au, are chemically stable and useful for quantitative, multispectral, refractive index and spectroscopic chemical sensing. Compared to previously reported homometallic devices, the results presented herein illustrate improvements in performance that stem from the distinctive plasmonic features and strong localized electric fields produced by the Ag and Au layers, which are optimized in terms of metal thickness and geometric features. Finite-difference time-domain (FDTD) simulations theoretically verify the nature of the multimode plasmonic resonances generated by the devices and allow for a better understanding of the enhancements in multispectral refractive index and SERS-based sensing. Taken together, these results demonstrate a robust and potentially useful new platform for chemical/spectroscopic sensing.},
doi = {10.3762/bjnano.8.249},
journal = {Beilstein Journal of Nanotechnology},
number = ,
volume = 8,
place = {United States},
year = {Fri Nov 24 00:00:00 EST 2017},
month = {Fri Nov 24 00:00:00 EST 2017}
}
Web of Science
Figures / Tables:
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Quantitative multispectral biosensing and 1D imaging using quasi-3D plasmonic crystals
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Bimetallic Layers Increase Sensitivity of Affinity Sensors Based on Surface Plasmon Resonance
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Figures / Tables found in this record: