Plasmon-Like Collective Effects in the Tma-Oda Conductive Layer Obtained by Ion Irradiation

Abstract

We show by SIMS analysis that the conductive layer obtained by ion bombardment of TMA-ODA in the 100 keV energy range is in fact consumed of two sheets. The first one results from the accumulation of non volatile compounds, probably arranged in a conjugated dienes structure. Because the physical stage of bond breaks concerns only the linkages with the highest ionization potentials, we can assume, for the energy tranfer between the moving ion and the macro-molecule, a coherent coupling mode (plasmon) defined by ω² _res = ω² _p+ω² _k0 where ω^p is the bulk plasma frequency and ω² _k0 ^1/2 the root-mean-square value of the individual transition frequencies of the concerned valence electrons (i. e. σ and π electrons).