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Nonstandard Roughness of Terraced Surfaces

Domenii publicaţii > Fizica + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: S. Gheorghiu and P. Pfeifer

Editorial: Physical Review Letters, 85, p.3894, 2000.

Rezumat:

We present a class of surfaces which are simultaneously flat and rough over the same range of lengths. They are self-affine, have well-defined roughness exponents, and consist of terraces of all sizes. The coexistence of flat and rough makes them respond to different external interactions with variable roughness. We demonstrate this for optical scattering (including x rays), two wetting situations, diffusion currents, and catalysis. A terraced Cu surface is a “self-assembled” experimental example, and designs for nano and micromachined examples are presented.

Cuvinte cheie: rough surfaces, roughness exponents, self-affinity, terraced surfaces