title: Anomalous enhancement in the infrared phonon intensity of a one-dimensional uneven peanut-shaped C60 polymer.
abstract: A one-dimensional (1D) uneven peanut-shaped C(60) polymer formed from electron-beam (EB)-induced polymerization of C(60) molecules showed an anomalous increase in two characteristic infrared (IR) peak intensities, which are respectively due to the radial and tangential motion of the 1D polymer, when compared to the IR peaks of pristine C(60) films. This anomaly was analyzed on the basis of the vibrational van Hove singularity (VHS), using an extended thin-shell elastic model fully considering the effects of periodic radius modulation inherent to the 1D uneven peanut-shaped C(60) polymer. We succeeded in explaining the enhancement in the tangential peak intensity by VHS, whereas the origin to cause that in the radial peak intensity is still unclear.
authors.affiliation: Research Laboratory for Nuclear Reactors and Department of Nuclear Engineering, Tokyo Institute of Technology, O-okayama, Meguro, Tokyo 152-8550, Japan. neno@phys.uni-sofia.bg
authors.forename: J
authors.initials: J
authors.lastname: Onoe
authors.forename: A
authors.initials: A
authors.lastname: Takashima
authors.forename: S
authors.initials: S
authors.lastname: Ono
authors.forename: H
authors.initials: H
authors.lastname: Shima
authors.forename: T
authors.initials: T
authors.lastname: Nishii
mesh_terms: D002244:Carbon / Q000737:chemistry; D002627:Chemistry, Physical / Q000379:methods*; D004548:Elasticity; D004583:Electrons; D037741:Fullerenes / Q000737:chemistry*; D015233:Models, Statistical; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods; D037742:Nanotubes, Carbon / Q000737:chemistry; D060739:Phonons; D011108:Polymers / Q000737:chemistry; D013055:Spectrophotometry, Infrared / Q000379:methods; D014732:Vibration
chemical_list: D037741:Fullerenes; D037742:Nanotubes, Carbon; D011108:Polymers; D002244:Carbon; C069837:fullerene C60