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. 2018 Oct 26;8:15847. doi: 10.1038/s41598-018-34158-4

Figure 1.

Figure 1

A schematic view of NF etching on the NV nanodiamonds. Optical near-fields (ONF) are generated by the He-Cd laser (3.81 eV) irradiation at the nanoscale protrusions on the nanodiamond surface. Since the photon energy is below the O2 dissociation energy (5.12 eV), O2 is only dissociated at the protrusions, thus allowing selective etching.