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The implantation of 1 MeV metal (63Cu+, 107Ag+, 197Au+) and non-metal (4He+, 12C+) ions in a polycarbonate (PC) matrix has been studied in order to evaluate the role of ion species in the modification of optical and electrical properties of the polymer. When the ion fluence is above ∼1 × 1013 ions cm−2, the threshold for latent tracks overlapping is overcome and π-bonded carbon clusters grow and aggregate forming a network of conjugated CC bonds. For fluences around 1 × 1017 ions cm−2, the aggregation phenomena induce the formation of amorphous carbon and/or graphite like structures. At the same time, nucleation of metal nanoparticles (NPs) from implanted species can take place when the supersaturation threshold is overcome. The optical absorption of the samples increases in the visible range and the optical band gap redshifts from 3.40 eV up to 0.70 eV mostly due to the carbonization process …
Publication date: 
15 Jul 2014

V Resta, G Quarta, I Farella, L Maruccio, A Cola, L Calcagnile

Biblio References: 
Volume: 331 Pages: 168-171
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms