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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemistry
Gold dimer nanoantenna with slanted gap for tunable LSPR and improved SERS
Journal of Physical Chemistry C, Volume 118, No. 6, Year 2014
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Description
We focus on improving the surface-enhanced Raman scattering (SERS) of dimer nanoantenna by tailoring the shape of the coupled nanoantennas extremities from rounded to straight or slanted ones. A numerical model based on the discrete dipole approximation method-taking into account periodicity, adhesion layer, and roughness-is first validated by comparison with localized surface plasmon resonance (LSPR) and SERS experiments on round-edged dimer nanoantennas and then used to investigate the effect of the straight or slanted gap in the dimer antenna. Simulations show that both LSPR and SERS can be tuned by changing the gap slanting angle. The SERS enhancement factor can also be improved by 2 orders of magnitude compared to the one reached using a rounded gap. Therefore, the slanting angle can be used as a new control parameter in the design of SERS substrates to guarantee stronger field confinement and higher sensitivity, especially as its feasibility is demonstrated. © 2014 American Chemical Society.
Authors & Co-Authors
Kessentini, Sameh
Tunisia, Sfax
Faculté Des Sciences de Sfax
Barchiesi, Dominique
France, Troyes
Université de Technologie de Troyes
D'Andrea, C.
Italy, Rome
Consiglio Nazionale Delle Ricerche
Toma, Andrea
Italy, Genoa
Istituto Italiano Di Tecnologia
Guillot, Nicolas
France, Villetaneuse
University Sorbonne Paris Nord
Di Fabrizio, Enzo
Saudi Arabia, Thuwal
King Abdullah University of Science and Technology
Italy, Catanzaro
Università Degli Studi Magna Graecia Di Catanzaro
Fazio, B.
Italy, Rome
Consiglio Nazionale Delle Ricerche
Maragò, O. M.
Italy, Rome
Consiglio Nazionale Delle Ricerche
Gucciardi, P. G.
Italy, Rome
Consiglio Nazionale Delle Ricerche
Lamy de la Chapelle, Marc L.
France, Villetaneuse
University Sorbonne Paris Nord
Statistics
Citations: 91
Authors: 10
Affiliations: 7
Identifiers
Doi:
10.1021/jp409844y
ISSN:
19327447
e-ISSN:
19327455