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a SEM image of the nose-type gold-coated AFM tip. The red frame indicates the simulated part of the tip. b Mesh representation of the tip end. The spherical ending (11 nm radius) was taken off axis in order to better represent the roughness of a gold-coated tip. The red shadow indicates laser focus (out of scale) The 44° half-cone light is associated to the 0.7 NA lens used in the experiment (see “Materials and Methods” section)
