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Plasmonic near-field localization of silver core-shell nanoparticle assemblies via wet chemistry nanogap engineering

(2017) ACS APPLIED MATERIALS & INTERFACES. 9(47). p.41577-41585
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Abstract
Silver nanoparticles are widely used in the field of plasmonics because of their unique optical properties. The wavelength-dependent surface plasmon resonance gives rise to a strongly enhanced electromagnetic field, especially at so-called hot spots located in the nanogap in-between metal nanoparticle assemblies. Therefore, the interparticle distance is a decisive factor in plasmonic applications, such as surface-enhanced Raman spectroscopy (SERS). In this study, the aim is to engineer this interparticle distance for silver nanospheres using a convenient wet-chemical approach and to predict and quantify the corresponding enhancement factor using both theoretical and experimental tools. This was done by building a tunable ultrathin polymer shell around the nanoparticles using the layer-by-layer method, in which the polymer shell acts as the separating interparticle spacer layer. Comparison of different theoretical approaches and corroborating the results with SERS analytical experiments using silver and silver polymer core shell nanoparticle clusters as SERS substrates was also done. Herewith, an approach is provided to estimate the extent of plasmonic near-field enhancement both theoretically as well as experimentally.
Keywords
surface plasmon resonance, silver, core-shell nanoparticles, SERS, layer-by-layer, nanogap, COMSOL Multiphysics, SURFACE-ENHANCED RAMAN, HOT-SPOTS, GAS-PHASE, SPECTROSCOPY, SCATTERING, SERS, PHOTOCATALYSIS, BIOPHOTONICS, DEGRADATION, EXCITATION

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Citation

Please use this url to cite or link to this publication:

Chicago
Asapu, Ramesh, Radu-George Ciocarlan, Nathalie Claes, Natan Blommaerts, Matthias Minjauw, Tareq Ahmad, Jolien Dendooven, et al. 2017. “Plasmonic Near-field Localization of Silver Core-shell Nanoparticle Assemblies via Wet Chemistry Nanogap Engineering.” Acs Applied Materials & Interfaces 9 (47): 41577–41585.
APA
Asapu, R., Ciocarlan, R.-G., Claes, N., Blommaerts, N., Minjauw, M., Ahmad, T., Dendooven, J., et al. (2017). Plasmonic near-field localization of silver core-shell nanoparticle assemblies via wet chemistry nanogap engineering. ACS APPLIED MATERIALS & INTERFACES, 9(47), 41577–41585.
Vancouver
1.
Asapu R, Ciocarlan R-G, Claes N, Blommaerts N, Minjauw M, Ahmad T, et al. Plasmonic near-field localization of silver core-shell nanoparticle assemblies via wet chemistry nanogap engineering. ACS APPLIED MATERIALS & INTERFACES. 2017;9(47):41577–85.
MLA
Asapu, Ramesh, Radu-George Ciocarlan, Nathalie Claes, et al. “Plasmonic Near-field Localization of Silver Core-shell Nanoparticle Assemblies via Wet Chemistry Nanogap Engineering.” ACS APPLIED MATERIALS & INTERFACES 9.47 (2017): 41577–41585. Print.
@article{8541528,
  abstract     = {Silver nanoparticles are widely used in the field of plasmonics because of their unique optical properties. The wavelength-dependent surface plasmon resonance gives rise to a strongly enhanced electromagnetic field, especially at so-called hot spots located in the nanogap in-between metal nanoparticle assemblies. Therefore, the interparticle distance is a decisive factor in plasmonic applications, such as surface-enhanced Raman spectroscopy (SERS). In this study, the aim is to engineer this interparticle distance for silver nanospheres using a convenient wet-chemical approach and to predict and quantify the corresponding enhancement factor using both theoretical and experimental tools. This was done by building a tunable ultrathin polymer shell around the nanoparticles using the layer-by-layer method, in which the polymer shell acts as the separating interparticle spacer layer. Comparison of different theoretical approaches and corroborating the results with SERS analytical experiments using silver and silver polymer core shell nanoparticle clusters as SERS substrates was also done. Herewith, an approach is provided to estimate the extent of plasmonic near-field enhancement both theoretically as well as experimentally.},
  author       = {Asapu, Ramesh and Ciocarlan, Radu-George and Claes, Nathalie and Blommaerts, Natan and Minjauw, Matthias and Ahmad, Tareq and Dendooven, Jolien and Cool, Pegie and Bals, Sara and Denys, Siegfried and Detavernier, Christophe and Lenaerts, Silvia and Verbruggen, Sammy W},
  issn         = {1944-8244},
  journal      = {ACS APPLIED MATERIALS \& INTERFACES},
  language     = {eng},
  number       = {47},
  pages        = {41577--41585},
  title        = {Plasmonic near-field localization of silver core-shell nanoparticle assemblies via wet chemistry nanogap engineering},
  url          = {http://dx.doi.org/10.1021/acsami.7b13965},
  volume       = {9},
  year         = {2017},
}

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