Surface-Enhanced Raman Spectroscopy Using Lipid Encapsulated Plasmonic Nanoparticles and J-Aggregates To Create Locally Enhanced Electric Fields

2013 ◽  
Vol 117 (4) ◽  
pp. 1879-1886 ◽  
Author(s):  
Colin R. Zamecnik ◽  
Aftab Ahmed ◽  
Christopher M. Walters ◽  
Reuven Gordon ◽  
Gilbert C. Walker
Keyword(s):  
Raman Spectroscopy ◽  
Electric Fields ◽  
Surface Enhanced Raman Spectroscopy ◽  
Plasmonic Nanoparticles ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
J Aggregates

scholarly journals Refractive index sensing and surface-enhanced Raman spectroscopy using silver–gold layered bimetallic plasmonic crystals

2017 ◽  
Vol 8 ◽  
pp. 2492-2503 ◽  
Author(s):  
Somi Kang ◽  
Sean E Lehman ◽  
Matthew V Schulmerich ◽  
An-Phong Le ◽  
Tae-woo Lee ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Refractive Index ◽  
Electric Fields ◽  
Surface Enhanced Raman Spectroscopy ◽  
Plasmonic Crystals ◽  
Metal Thickness ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Difference Time

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.

scholarly journals Sandwiching analytes with structurally diverse plasmonic nanoparticles on paper substrates for surface enhanced Raman spectroscopy

RSC Advances ◽  
2019 ◽  
Vol 9 (56) ◽  
pp. 32535-32543 ◽  
Author(s):  
Jemima A. Lartey ◽  
John P. Harms ◽  
Richard Frimpong ◽  
Christopher C. Mulligan ◽  
Jeremy D. Driskell ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Hot Spots ◽  
Surface Enhanced Raman Spectroscopy ◽  
Signal Enhancement ◽  
Plasmonic Nanoparticles ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Paper Substrates

Systematic combination of plasmonic nanoparticles on a paper-based substrate introduces SERS-based signal-enhancement environments via interparticle coupling and hot spots.

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