The structural modification of C60 films induced by 300-keV Xe-ion irradiation was investigated. The irradiated C60 films were analysed using Fourier transform infrared spectroscopy, the Raman scattering technique, ultraviolet/visible spectrophotometry and atomic force microscopy. The analysis results indicate that the Xe-ion irradiation induces polymerization and damage of the C60 molecule and significantly modifies the surface morphology and the optical property of the C60 films. The damage cross-section for the C60 molecule was also evaluated.
In the present work, we used the technique of “low energy ion implantation + swift; heavy ion irradiation ”to investigate huge electronic excitations induced modification in N-doped graphite-like-carbon.
Experimental results showed that energetic ion induced phase change in a solid could be achieved not only by irradiation at high fluences but also by singe ion induced huge electronic excitations. The phase change produced in the later condition is just along individual ion latent tracks。Poecently, we have proposed a novel technique,“low energy ion implantation + swift heavy ion irradiation”, for synthesizing new structures in atom mixed materials in which more attention was paid to the dense electronic excitations effect induced by theincident ions. In the present work, the technique[2} was used to investigate huge electronic excitations
The structural stability of C60 films under the bombardment of 1.95 GeV Kr ions is investigated.The irradiated C60 films were analyzed by Fourier Transform Infrared(FTIR) spectroscopy and Raman scattering technique.The analytical results indicate that the irradiation induced a decrease of icosahedral symmetry of C60 molecule and damage of C60 films;different vibration modes of C60 molecule have different irradiation sensitivities;the mean efficient damage radius obtained from experimental data is about 1.47 nm,which is in good agreement with thermal spike model prediction.
YAO CunFengFU YunChongJIN YunFanWANG ZhiGuangZANG HangWEI KongFangGOU JieMA YiZhunSHEN TieLong
