C[sub 120][sup +] isomers from laser ablation of fullerene films

Journal Article · Thu Aug 04 04:00:00 EDT 1994 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100082a007· OSTI ID:7015458

Hunter, J M; Fye, J L; Boivin, N M; Jarrold, M F ^[1]

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1. Northwestern Univ., Evanston, IL (United States)

Laser ablation of fullerene films results in coalescence of fullerenes to form large carbon clusters. Mobility studies of size-selected C[sub 120][sup +] formed by this method reveal the presence of at least two abundant structural isomers. One of these isomers has a closed-shell fullerene structure (identical to that generated by the laser vaporization of graphite), and the other has a C[sub 60] [open quotes]dimer[close quotes] structure. When these clusters are collisionally annealed, around 40% of the [open quotes]dimer[close quotes] dissociates to give C[sub 60][sup +] + C[sub 60] and around 30% appears to anneal into the closed-shell fullerene. The balance remains unchanged up to relatively high injection energies, indicating the formation of some strongly bound [open quotes]dimers[close quotes]. The activation energies for the annealing and dissociation processes are low, approximately 1.5 eV. 32 refs., 4 figs.

• OSTI ID: 7015458
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 98:31; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400500 -- Photochemistry
ABLATION
CARBON
CATIONS
CHARGED PARTICLES
CHEMICAL ACTIVATION
DISSOCIATION
ELEMENTS
EXCIMER LASERS
FILMS
FULLERENES
GAS LASERS
IONS
ISOMERS
LASERS
MOLECULAR STRUCTURE
NONMETALS
SOLID CLUSTERS