[Ifeffit] EXAFS mean free path in small particles

This is one of the references stating that surface plazmon intensity vanishes as the particle size gets smaller than 2nm: C.N.R.Rao et al, Size-Dependent Chemistry: Properties of Nanocrystals, Chem. Eur. J. 2002, 8, No. 1, p. 29. Here is the quote: "Gold nanocrystals of varying diameters between 2 and 4nm exhibit distinct bands around ~ 525 nm, the intensity of which increases with size (ref, ref). The intensity of this feature becomes rather small in the case of 1 nm diameter particles basically due to a reduced number of "itinerant" electrons in the electron cloud." There are other evidences that small particles have DOS similar to molecules, not typical metals. Most notable is the evidence that HOMO-LUMO band grows to more than 1 eV at sizes of 1 nm range.

The point is, to my opinion, that since In the most interesting range, below 2nm, the plasmon activity decreases, therefore its effect on EXAFS interpretation, if any, should be negligible.