Influence of tip geometry on the spatial resolution of tip enhanced Raman mapping

Zhang Chao¹, Chen Bao-Qin², Li Zhi-Yuan^{1, †,}

The local field intensities for different molecular locations considering the molecular self-interaction: β = 1, (a), (c), (e), (g) for r_z = 0.7 nm, 1 nm, 1.3 nm, 1.6 nm; β = 5β₀, (b), (d), (f), (h) for r_z = 0.7 nm, 1 nm, 1.3 nm, 1.6 nm. The radius of the tip apex is R = 10nm and the tip–substrate distance is d = 2 nm.