Near-field fluorescence and topography characterization of a single nanometre fluorophore by apertureless tip-enhanced scanning near-field Microscopy

摘要

Tip-enhanced near-field fluorescence and topography characterization of a single nanometre fluorophore is conducted by using an apertureless scanning near-field microscopy system. A fluorophore with size 80 nm is mapped with a spatial resolution of 10 nm. The corresponding near-lield fluorescence data shows significant signal enhancement due to the apertureless tip-enhanced effect. With the nanometre spatial resolution capability and nanometre local tip-enhanced effect, the apertureless tip-enhanced scanning near-field microscopy may be further used to characterize a single molecule by realizing the local near-lield spectrum assignment corresponding to topography at nanometre scale.