Gold Nanoparticles as Probes for Nano-Raman Spectroscopy: Preliminary Experimental Results and Modeling
Figure 5
(a) map of the Raman enhancement factor in the vicinity of the surface. For modeling this 2D structure, only 1 nanoparticle is considered. The diameter of the NPs was fixed to 15 nm, and the distance between tip-surface was taken 1 nm. The wavelength of the Raman excitation was fixed at 650 nm. (b) Finite Elements Analysis (FEA) of the near-field profile of the gold tip under Plasmon resonance excitation, as a function of the wavelength (400–900 nm) and of the tip-surface distance (0.1 to 10 nm).
