
TERS
Tip enhanced Raman spectroscopy




As a part of research into Surface-Enhanced Raman Scattering (SERS), an advanced study focusing on Tip-Enhanced Raman Scattering (TERS) for a novel imager device was performed. The initial aim was to define the optimal shape of the probe - tip or cavity, round or sharp. The investigations focused on the effects of shape (hemisphere, hemispheroid, ellipsoidal cavity, ellipsoidal rod, nanocone) and material (Ag, Au, Al) on enhancement, as well as the effect of excitation wavelengths on the electric field. Thorough analyses were performed around critical parameters, such as the plasmonic metal (using the Rakic model), the tip geometry, 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.
Articles
Y. Mandelbaum, R. Mottes, Z. Zalevsky, D. Zitoun, A. Karsenty, “Investigations of Shape, Material and Excitation Wavelength Effects on Field Enhancement in SERS Advanced Tips”, Nanomaterials 2021, 11(1), 237. Special Issue “Application of SERS for Nanomaterials”. doi: https://doi.org/10.3390/nano11010237