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Journal Articles

Uniformly dimerized C60 film prepared by deposition under ${it in situ}$ photoirradiation

Tanimoto, Hisanori*; Yamada, Kaina*; Mizubayashi, Hiroshi*; Matsumoto, Yoshihiro; Naramoto, Hiroshi*; Sakai, Seiji

Applied Physics Letters, 93(15), p.151919_1 - 151919_3, 2008/10

https://doi.org/10.1063/1.3003866
 Times Cited Count：7 Percentile：29.99(Physics, Applied)

C60 films with thicknesses of 100-480 nm were deposited on Si reed substrates under in situ photoirradiation. In anelasticity measurements, no internal friction peaks associated with rotational motions of the C60 molecules were observed, and Young's modulus was 1.5 times larger than that of a pristine C60 material. X-ray diffraction patterns suggested that the face-centered cubic lattice was contracted by about 3% and locally distorted from the pristine C60 material. Raman spectra very similar to those reported for dimerized C60 were also obtained. These characteristics recovered to those of the pristine C60 materials after annealing the C60 films at 523 K. These results indicate uniform dimerization in C60 films deposited under ${it in situ}$ photoirradiation.

Journal Articles

Elasticity study of the irradiation-induced polymerization and decomposition of C$$_{60}$$ solid

Tanimoto, Hisanori*; Yamada, Kaina; Mizubayashi, Hiroshi*; Sakai, Seiji; Narumi, Kazumasa; Naramoto, Hiroshi*

Materials Science & Engineering A, 442(1-2), p.319 - 322, 2006/12

https://doi.org/10.1016/j.msea.2006.01.151
 Times Cited Count：3 Percentile：28.59(Nanoscience & Nanotechnology)

We investigated the polymerization and decomposition of C$$_{60}$$ solids by high-energy ion irradiation. Young's modulus of the films showed a slight increase after irradiation with 15 MeV C$$^{4+}$$ ions at a dose of 1$$times$$10$$^{13}$$ ion/cm$$^{-2}$$. Relaxation and lambda-shaped peaks were observed at approximately 135 and 250 K, respectively, in the internal friction. These almost disappeared at a dose of 1$$times$$10$$^{15}$$ ion/cm$$^{-2}$$. We concluded that the polymerization of C$$_{60}$$ and the local destruction of the face-centered cubic structure proceed concurrently on irradiation, and the structural phase transition at 250 K is suppressed after irradiation with doses greater than 1$$times$$10$$^{15}$$ ion/cm$$^{-2}$$.

Oral presentation

Micro-pattern formation of C$$_{60}$$ by traveling pulsating-wave of in-melt in transition metal-fullerene compounds

Sakai, Seiji; Naramoto, Hiroshi; Rikukawa, Atsushi*; Narumi, Kazumasa; Tanimoto, Hisanori*

no journal, , 

no abstracts in English

Oral presentation

Elasticity study on polymerization of C$$_{60}$$ by UV-light and ion irradiations

Yamada, Kaina; Tanimoto, Hisanori*; Mizubayashi, Hiroshi*; Sakai, Seiji; Naramoto, Hiroshi; Narumi, Kazumasa

no journal, , 

no abstracts in English

Oral presentation

Polymerization in C$$_{60}$$ thin films deposited under ${it in situ}$ UV light irradiation

Sakai, Seiji; Tanimoto, Hisanori*; Matsumoto, Yoshihiro; Entani, Shiro; Otomo, Manabu; Arai, Daijiro

no journal, , 

no abstracts in English

Oral presentation

Polymerization and electric conductivity of C$$_{60}$$ film deposited under ${it in-situ}$ UV light irradiation

Sakai, Seiji; Arai, Daijiro; Tanimoto, Hisanori*; Otomo, Manabu; Entani, Shiro; Matsumoto, Yoshihiro

no journal, , 

no abstracts in English

Oral presentation

Nano-carbon and molecular materials for spintronic applications

Sakai, Seiji; Matsumoto, Yoshihiro; Entani, Shiro; Otomo, Manabu; Arai, Daijiro; Tanimoto, Hisanori*; Naramoto, Hiroshi*

no journal, , 

no abstracts in English

Oral presentation

FET characteristics of photo-polymerized C$$_{60}$$ thin films on graphene electrodes

Arai, Daijiro; Tanimoto, Hisanori*; Otomo, Manabu; Entani, Shiro; Matsumoto, Yoshihiro*; Sakai, Seiji

no journal, , 

no abstracts in English

8 (Records 1-8 displayed on this page)
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