The possibility of forming nanostructures on the surface of solids by the action of nanosecond laser pulses causing the material to melt has been shown both theoretically and experimentally. The depen dence that the characteristic sizes of the surface nanostructures have on the energy of the laser beam and duration is established. Experimental results on samples of various materials obtained by direct laser nano structuring using an ArF laser and images of titanium samples with surface nanostructures are presented.

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