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- Han, Kyoo-Hyun, et al.
(författare)
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Proton bombardment of Hard Carbon
- 2006
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Ingår i: Fullerenes, Nanotubes and Carbon Nanostructures vol. 14 issue 2&3. - : Informa UK Limited. ; , s. 381-384
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Konferensbidrag (refereegranskat)
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- Makarova, Tatiana L., et al.
(författare)
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Experimental realization of high spin states in dilutely hydrogenated fullerenes
- 2009
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Ingår i: Physica status solidi. B, Basic research. - : John Wiley & Sons. - 0370-1972 .- 1521-3951. ; 246:11-12, s. 2778-2781
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Tidskriftsartikel (refereegranskat)abstract
- A novel method for preparing dilutely hydrogenated fullerenes H:C60 is presented. DFT calculations of the Raman spectra at the B3LYP/3-21G level are compared with the experimental data. Under the laser treatment these phases form a rich variety of dimeric and polymeric structures, quite in contrast to pristine C60 which forms dimers and polymers bonded through the [2 + 2] addition, and in contrast to heavily hydrogenated fullerenes which do not polymerize at all. Dilutely hydrogenated fullerenes polymerize differently, forming both double bonded structures and single bonded dimers. We have shown that dilute hydrogenation of C60 creates large amount of unpaired spins which disappear due to the formation of diamagnetic single bonded dimers.
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- Makarova, Tatiana L, et al.
(författare)
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Magnetism in photopolymerized fullerenes
- 2003
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Ingår i: Carbon. - Amsterdam : Elsevier B.V.. - 0008-6223 .- 1873-3891. ; 41:8, s. 1575-1584
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Tidskriftsartikel (refereegranskat)abstract
- The phototransformation of bulk C-60 and laser- and electron-beam treatment of C-60 films in air changes their magnetic properties. Nonlinear magnetization is observed only for samples irradiated in the presence of oxygen, while, in the case of pressure-polymerized C-60, oxygen adversely affects the magnetic properties. The contrasting roles of oxygen in these processes are discussed. Magnetic force microscopy shows that laser- and electron-beam irradiation of fullerene films produces magnetic images which are highly correlated with the topographic images.
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