The effect of keV ion irradiation on the electronic structure of highly oriented pyrolytic graphite has been investigated by means of electronic spectroscopies. Samples were irradiated by a 0.5 keV Ar+ beam with fluences from 3 x 10(14) up to 3 x 10(15) ions/cm2. In order to investigate the relationship between initial (crystalline) and final (amorphous) structure in ion beam processing, we have compared the electronic states of graphite with those of damaged diamond and polystyrene. Results indicate that the process of amorphization by ion beam is very fast and it stabilizes after a dose corresponding to about one atomic monolayer, producing the same type of amorphous carbon regardless of the virgin material.
ELECTRONIC-STRUCTURE OF 0.5 KEV AR+ IRRADIATED GRAPHITE
TERRASI, Antonio;
1993-01-01
Abstract
The effect of keV ion irradiation on the electronic structure of highly oriented pyrolytic graphite has been investigated by means of electronic spectroscopies. Samples were irradiated by a 0.5 keV Ar+ beam with fluences from 3 x 10(14) up to 3 x 10(15) ions/cm2. In order to investigate the relationship between initial (crystalline) and final (amorphous) structure in ion beam processing, we have compared the electronic states of graphite with those of damaged diamond and polystyrene. Results indicate that the process of amorphization by ion beam is very fast and it stabilizes after a dose corresponding to about one atomic monolayer, producing the same type of amorphous carbon regardless of the virgin material.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
