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Article

Investigations of Shape, Material and Excitation Wavelength Effects on Field Enhancement in SERS Advanced Tips

1
Advanced Laboratory of Electro-Optics (ALEO), Department of Applied Physics/Electro-Optics Engineering, Jerusalem College of Technology, Jerusalem 9116001, Israel
2
Faculty of Engineering, Bar-Ilan University, Ramat Gan 5290002, Israel
3
Nanotechnology Center, Bar-Ilan University, Ramat Gan 5290002, Israel
4
Faculty of Exact Science, Department of Chemistry, Bar-Ilan University, Ramat Gan 5290002, Israel
5
Nanotechnology Center for Research and Education, Jerusalem College of Technology, Jerusalem 9116001, Israel
*
Author to whom correspondence should be addressed.
Nanomaterials 2021, 11(1), 237; https://doi.org/10.3390/nano11010237
Received: 5 January 2021 / Revised: 12 January 2021 / Accepted: 14 January 2021 / Published: 18 January 2021
(This article belongs to the Special Issue Application of SERS for Nanomaterials)
This article, a part of the larger research project of Surface-Enhanced Raman Scattering (SERS), describes an advanced study focusing on the shapes and materials of Tip-Enhanced Raman Scattering (TERS) designated to serve as part of a novel imager device. The initial aim was to define the optimal shape of the “probe”: tip or cavity, round or sharp. The investigations focused on the effect of shape (hemi-sphere, hemispheroid, ellipsoidal cavity, ellipsoidal rod, nano-cone), and the effect of material (Ag, Au, Al) on enhancement, as well as the effect of excitation wavelengths on the electric field. Complementary results were collected: numerical simulations consolidated with analytical models, based on solid assumptions. Preliminary experimental results of fabrication and structural characterization are also presented. Thorough analyses were performed around critical parameters, such as the plasmonic metal—Silver, Aluminium or Gold—using Rakic model, the tip geometry—sphere, spheroid, ellipsoid, nano-cone, nano-shell, rod, cavity—and the geometry of the plasmonic array: cross-talk in multiple nanostructures. These combined outcomes result in an optimized TERS design for a large number of applications. View Full-Text
Keywords: TERS; SERS; nano-cones; nano-cavities; plasmon; numerical; analytical model TERS; SERS; nano-cones; nano-cavities; plasmon; numerical; analytical model
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MDPI and ACS Style

Mandelbaum, Y.; Mottes, R.; Zalevsky, Z.; Zitoun, D.; Karsenty, A. Investigations of Shape, Material and Excitation Wavelength Effects on Field Enhancement in SERS Advanced Tips. Nanomaterials 2021, 11, 237. https://doi.org/10.3390/nano11010237

AMA Style

Mandelbaum Y, Mottes R, Zalevsky Z, Zitoun D, Karsenty A. Investigations of Shape, Material and Excitation Wavelength Effects on Field Enhancement in SERS Advanced Tips. Nanomaterials. 2021; 11(1):237. https://doi.org/10.3390/nano11010237

Chicago/Turabian Style

Mandelbaum, Yaakov, Raz Mottes, Zeev Zalevsky, David Zitoun, and Avi Karsenty. 2021. "Investigations of Shape, Material and Excitation Wavelength Effects on Field Enhancement in SERS Advanced Tips" Nanomaterials 11, no. 1: 237. https://doi.org/10.3390/nano11010237

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