Infrared-optical properties of gas-evaporated gold blacks Evidence for anomalous conduction on fractal structures

Details Infrared-optical properties of gas-evaporated gold blacks Evidence for anomalous conduction on fractal structures Infrared-optical properties of gas-evaporated gold blacks Evidence for anomalous conduction on fractal structures

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986phrvl..56..256n&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 56, Jan. 20, 1986, p. 256-258. Research supported by the Naturvetenskapliga Forsk

Physics

37

Fractals, Gold, Infrared Absorption, Microstructure, Optical Properties, Conduction, Dielectrics

Scientific paper

It is shown that the far-infrared absorption in gas-evaporated gold blacks, which was measured by Harris et al. (1948) exhibits all the features expected for anomalous conduction on fractal structures and therefore constitutes a confirmation of current theory. The frequency-dependent optical conductivity of the gold blacks conforms to the powder law rho varies as exp 0.7 sigma below the relaxation frequency for electrons in a single particle. This result is consistent with the conductivity exponents for percolation clusters and diffusion-limited aggregates.

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