The requirements for reliability of the parameters deduced from the statistical analysis of the cluster morphology of thin inhomogeneous films near the percolation threshold are first pointed out. Two experimental examples of non-relevance in the treatment of films very close to the percolation...

Percolation clusters are known to be well described by the percolation correlation length ξ. In fact, this length is defined by the geometry of the clusters, and thus can only give an account of zero frequency (time independent) physical properties, such as dc conductivity or fractal morphology...

We compare the theoretical calculation of the dielectric function ϵ given by the Bruggeman theory, and the experimental values obtained from the reflectance and the transmittance measured by spectrophotometry in the infrared range (1–50 μm). It is concluded that the diluted regimes are well...

A slice of 3D metal-insulating mixture behaves like a 2D material when the correlation length is larger than its thickness, i.e. near the insulating-conducting transition. The experimental relation between the thickness and the critical filling factor is pointed out, by both electrical and...

The optical and electrical properties of metal-dielectric composites (cermets) show large variations as a function of volume fraction, size, shape and the statistical distribution of metallic grains in the dielectric. The flexibility of the optical properties around the percolation threshold can...

The physical properties of nanocermets are related mostly to their morphology. In this contribution, we present the microstructural and morphological evolution of co-sputtered PtAl2O3 granular films with thickness, metal concentration and thermal annealing. These investigations are achieved...

Aluminum/aluminiu nitride (A1/A1N) cerment films have been deposited by radio-frequency cosputtering. Determination of percolation threshold qc = 0.22 was derived from microstructural analysis and conductivity measurements. SIMS measurements also revealed inhomogeneities of atomic composition...

D.C. resistance, mass thickness, optical reflectance and transmittance at two infrared wavelengths (1.7 and 2.2 μm) are performed during the deposition process of thin gold films. A very large absorption is found in the vicinity of the percolation threshold well below and after it, while the...

Experimental optical absorption of gold granular films near the percolation threshold are compared with a two dimensional simulation using a real space renormalization procedure. It is some times asserted that the optical properties around the percolation cannot be described by an effective...