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Au Ion Induced Modification of C60 Thin Film Samples

Published online by Cambridge University Press:  01 February 2011

Navdeep Bajwa*
Affiliation:
Department of Physics, Panjab University, Chandigarh-160014, India Nuclear Science Center, Aruna Asaf Ali Marg, New Delhi-110067, India
Alka Ingale*
Affiliation:
Laser Physics Division, Center For Advanced Technology, Indore-452013 India Institut fuer Physikalische Chemie, Universitaet Wuerzburg, D-97074 Wuerzburg, Germany
D. K. Avasthi*
Affiliation:
Nuclear Science Center, Aruna Asaf Ali Marg, New Delhi-110067, India
Ravi Kumar*
Affiliation:
Nuclear Science Center, Aruna Asaf Ali Marg, New Delhi-110067, India
A. Tripathi*
Affiliation:
Nuclear Science Center, Aruna Asaf Ali Marg, New Delhi-110067, India
K. Dharamvir*
Affiliation:
Department of Physics, Panjab University, Chandigarh-160014, India
V. K. Jindal*
Affiliation:
Department of Physics, Panjab University, Chandigarh-160014, India
Michael Schmitt*
Affiliation:
Institut fuer Physikalische Chemie, Universitaet Wuerzburg, D-97074 Wuerzburg, Germany
W. Kiefer*
Affiliation:
Institut fuer Physikalische Chemie, Universitaet Wuerzburg, D-97074 Wuerzburg, Germany
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Extract

The present work reports phase transformations of thin films of C60 irradiated with 100 MeV 197Au8+ ions. This work is in continuation with our earlier work using 58Ni10+ and 16O6+ ions, to study the modification in C60 thin films. The study of C60 thin films using 197Au8+ ions, provides us enough additional data to investigate thoroughly the role of Se in causing phase transformations under different ion fluences. The Raman spectra indicate that swift heavy ion (SHI) irradiation results in several transformations of crystalline C60. At low fluences along with the fragmentation of C60 there is dimer/polymer formation. As fluence increases the dimer/polymer content first rises, optimizes, decreases and finally vanishes at very high fluences. At high fluences, all the C60 molecules as well as the polymer C60 break up, possibly resulting in nano-crystalline graphite embedded in amorphous carbon (a-C).

Type
Research Article
Copyright
Copyright © Materials Research Society 2005

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References

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