Abstract
Transparent polycarbonate samples were implanted with 1 MeV Ag+ ions to various doses ranging from 5 × 1014 to 3 × 1016 ions cm−2 with a beam current density of 900 nA cm−2. Modification in the structure of polycarbonate as a function of the implantation fluence was investigated using micro-Raman spectroscopy, glancing angle X-ray diffraction, and UV-Vis spectroscopy. Raman spectroscopy pointed toward the formation of graphite structures/clusters due to the ion implantation. UV-Vis absorption analysis suggests the formation of a carbonaceous layer and a drastic decrease in optical band gap from 4.12 eV to 0.50 eV at an implanted dose of 3 × 1016 ions cm−2. The correlation between the decrease in band gap and the structural changes is discussed.
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