Floating Tip Nanolithography
2008
We demonstrate noncontact, high quality surface modification of soft and hard materials with spatial resolution of ∼20 nm. The nanowriting is based on the interaction between the surface and the tip of a standard atomic force microscope illuminated by a focused femtosecond laser beam and hovering (at ambient conditions) 1-4 nanometers above the surface without touching it. Field enhancement at the tip-sample gap or high tip temperature are identified as the causes of material ablation.
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