Extended Data Fig. 6: Multiple pillar sensing.
a, A schematic for multiple pillar sensing. The diamond is tilted at an angle θ (using goniometric motors) so that one pillar is in contact with the substrate, while the scanning pillar maintains a constant height above the sample without touching it. The angle θ controls the height of the NV probe above the sample. b, An optical image of a multiple pillar scanning tip with 7 pillars. The extreme pillars are made to be thicker so they are optimized for durability in contact, while the central pillars are optimized for NV sensing.
